| 1 | Aciclovir Impurities |
| a | Aciclovir RS | 2-Amino-9-((2-hydroxyethoxy)methyl)-1H-purin-6(9H)-one | 59277-89-3 | C8H11N5O3 | 225.2 |
| b | Aciclovir EP Impurity-B | 2-Amino-1H-purin-6(7H)-one | 73-40-5 | C5H5N5O | 151.1 |
| c | Aciclovir EP Impurity-G | 2-((2-Acetamido-6-oxo-1H-purin-9(6H)-yl)methoxy)ethyl acetate,
Synonyms:Acyclovir Related Compound G;Aciclovir EP Impurity G;Diacetyl Acyclovir | 75128-73-3 | C12H15N5O5 | 309.2 |
| d | Aciclovir EP Impurity-L | N-(9-Acetyl-6-oxo-6,9-dihydro-1H-purin-2-yl)acetamide | 3056-33-5 | C9H9N5O3 | 235.2 |
| 2 | Acelofenac Impurities |
| a | Acelofenac RS | 2-(2-(2-((2,6-Dichlorophenyl)amino)phenyl)acetoxy)acetic acid
Synonyms:Preservex; Airtal | 89796-99-6 | C16H13Cl2NO4 | 354.2 |
| b | Acelofenac EP Impurity A | [2[2,6-dichlorophenyl)amino]phenyl]acetic acid | 15307-86-5 | C14H11Cl2NO2 | 296.147 |
| c | Acelofenac EP Impurity B | Methyl[2[2,6-dichlorophenyl)amino]phenyl]acetate | 15307-78-5 | C15H13Cl2NO2 | 310.174 |
| d | Acelofenac EP Impurity C | Ethyl[2[2,6-dichlorophenyl)amino]phenyl]acetate | 15307-77-4 | C16H15Cl2NO2 | 324.2 |
| e | Acelofenac EP Impurity D | Methyl[[[2[2,6-dichlorophenyl)amino]phenyl]acetyl]oxy]acetate | 139272-66-5 | C17H15Cl2NO4 | 368.2 |
| f | Acelofenac EP Impurity E | Ethyl[[[2[2,6-dichlorophenyl)amino]phenyl]acetyl]oxy]acetate | 139272-67-6 | C18H17Cl2NO4 | 382.2 |
| g | Acelofenac EP Impurity F | Benzyl[[[2[2,6-dichlorophenyl)amino]phenyl]acetyl]oxy]acetate | 100499-89-6 | C23H19Cl2NO4 | 444.3 |
| h | Acelofenac EP Impurity G | {[({[2-(2,6-dichloroanilino)phenyl]acetyl}oxy)acetyl]oxy}acetic acid | 1215709-75-3 | C18H15Cl2NO6 | 412.2 |
| i | Acelofenac EP Impurity H | [({[({[2-(2,6-dichloroanilino)phenyl]acetyl}oxy)acetyl]oxy}acetyl)oxy]acetic acid | 1216495-92-9 | C20H17Cl2NO8 | 470.2 |
| j | Acelofenac EP Impurity I | 1-(2,6-Dichlorophenyl)-2-indolinone | 15362-40-0 | C14H9Cl2NO | 278.1 |
| k | Acelofenac tert butyl ester | 2-(tert-Butoxy)-2-oxoethyl 2-(2-((2,6-dichlorophenyl)amino)phenyl)acetate | 139272-68-7 | C20H21Cl2NO4 | 410.3 |
| l | 4-Hydroxy Acelofenac | 2-(2-(2-((2,6-Dichloro-4-hydroxyphenyl)amino)phenyl)acetoxy)acetic acid
or ({[2-(2,6-dichloro-4-hydroxyanilino)phenyl]acetyl}oxy)acetic acid | 229308-90-1 | C16H13Cl2NO5 | 370.2 |
| 3 | Acesulfame Impurities |
| a | Acesulfame Potassium RS | N/A | 55589-62-3 | C4H5NO4S : K | 163.1 : 39.1 |
| b | Acesulfame Potassium EP Impurity A | N/A | 5977-14-0 | C4H7NO2 | 101.1 |
| c | Acesulfame Potassium EP Impurity B | N/A | 72827-08-8 | C4H4ClNO4S | 197.6 |
| 4 | Acetazolamide Impurities |
| a | Acetazolamide EP Impurity A | N-(5-Chloro-1,3,4-thiadiazol-2-yl)acetamide | 60320-32-3 | C4H4ClN3OS | 177.6 |
| b | Acetazolamide EP Impurity C | N-(5-Mercapto-1,3,4-thiadiazol-2-yl)acetamide | 32873-56-6 | C4H5N3OS2 | 175.2 |
| c | Acetazolamide EP Impurity D | 5-Amino-1,3,4-thiadiazole-2-sulfonamide | 14949-00-9 | C2H4N4O2S2 | 180.2 |
| d | Acetazolamide EP Impurity E | 5-Acetamido-1,3,4-thiadiazole-2-sulfonic acid | 827026-60-8 | C4H5N3O4S2 | 223.2 |
| e | Acetazolamide EP Impurity G | 5-Amino-1,3,4-thiadiazole-2-thiol | 2349-67-9 | C2H3N3S2 | 133.1 |
| 5 | Acetylcysteine Impurities |
| a | Acetylcysteine | (R)-2-Acetamido-3-mercaptopropanoic acid | 616-91-1 | C5H9NO3S | 163.2 |
| b | Acetylcysteine EP Impurity A (L-Cystine) | (2R,2'R)-3,3'-Disulfanediylbis(2-aminopropanoic acid) | 56-89-3 | C6H12N2O4S2 | 240.3 |
| c | Acetylcysteine EP Impurity B Hydrochloride | (R)-2-Amino-3-mercaptopropanoic acid hydrochloride | 52-89-1 | C3H7NO2S : HCl | 121.2 : 36.5 |
| d | Acetylcysteine EP Impurity C | N,N'-Diacetyl-L-Cystine | 5545-17-5 | C10H16N2O6S2 | 324.4 |
| e | Acetylcysteine EP Impurity D | (R)-2-Acetamido-3-(acetylthio)propanoic acid | 18725-37-6 | C7H11NO4S | 205.2 |
| f | N-Acetyl-L-Cysteine | (R)-2-Acetamido-3-(((R)-2-amino-2-carboxyethyl)disulfanyl)propanoic acid | 25779-79-7 | C8H14N2O5S2 | 282.3 |
| 6 | Alfuzosin Impurities |
| a | Alfuzosin EP Impurity B | 2-Chloro-4-amino-6,7-dimethoxyquinazoline | 23680-84-4 | C10H10CIN3O2 | 239.7 |
| 7 | Albendazole Impurities |
| a | Albendazole EP Impurity A | 5-(propylsulfanyl)-1H-1,3-benzimidazol-2-amine | 80983-36-4 | C10H13N3S | 207.3 |
| b | Albendazole EP Impurity B | Methyl (6-(propylsulfinyl)-1H-benzo[d]imidazol-2-yl)carbamate,
Synonyms:Ricobendazole | 54029-12-8 | C12H15N3O3S | 281.3 |
| c | Albendazole EP Impurity I | Methyl (5-propoxy-1H-benzo[d]imidazol-2-yl)carbamate
Synonyms:Anthelcide-EQ | 20559-55-1 | C12H15N3O3 | 249.3 |
| 8 | Allopurinol Impurities |
| a | Allopurinol RS | 1H-Pyrazolo[3,4-d]pyrimidin-4(5H)-one, | 315-30-0 | C5H4N4O | 136.1 |
| b | Allopurinol EP Impurity A (Sulfate) | 3-Amino-1H-pyrazole-4-carboxamide sulfate(2:1) | 27511-79-1 | 2(C4H6N4O) : H2O4S | 2(126.1) : 98.1 |
| c | Allopurinol EP Impurity D | Ethyl 3-amino-1H-pyrazole-4-carboxylate | 6994-25-8 | C6H9N3O2 | 155.2 |
| d | Allopurinol EP Impurity F (Hydrazine) | Hydrazine | 302-01-2 | H4N2 | 32.1 |
| e | Allopurinol Nitrile Impurity | 3-Amino-1H-pyrazole-4-carbonitrile | 16617-46-2 | C4H4N4 | 108.1 |
| 9 | Alogliptin Impurities |
| a | Alogliptin Benzoate RS | (R)-2-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile benzoate | 850649-62-6 | C18H21N5O2 : C7H6O2 | 339.4 : 122.1 |
| 10 | Anagrelide Impurities |
| a | Anagrelide RS | 6,7-Dichloro-5,10-dihydroimidazo[2,1-b]quinazolin-2(3H)-one hydrochloride | 58579-51-4 | C10H7Cl2N3O•HCl | 292.55 |
| b | Anagrelide USP Related compound A | Ethyl 2-((6-amino-2,3-dichlorobenzyl)amino)acetate | 70406-92-7 | C11H14Cl2N2O2 | 277.2 |
| 11 | Apixaban Impurities |
| a | Apixaban RS | 1-(4-Methoxyphenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxamide | 503612-47-3 | C25H25N5O4 | 459.5 |
| b | Apixaban Impurity A
(Apixaban Acid impurity) | 1-(4-Methoxyphenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylic acid | 503614-92-4 | C25H24N4O5 | 460.5 |
| c | Apixaban Impurity 9 (Ethyl ester) | Ethyl 1-(4-methoxyphenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate | 503614-91-3 | C27H28N4O5 | 488.6 |
| d | Apixaban USP Related Compound E
(Methyl ester of Apixaban) | Methyl 1-(4-methoxyphenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate | 1074365-84-6 | C26H26N4O5 | 474.5 |
| 12 | Amitriptyline Impurities |
| a | Amitriptyline EP Impurity A | 10,11-Dihydro-5H-dibenzo[a,d][7]annulen-5-one, | 1210-35-1 | C15H12O | 208.3 |
| b | Amitriptyline EP Impurity B | 3-(5H-Dibenzo[a,d][7]annulen-5-ylidene)-N,N-dimethylpropan-1-amine hydrochloride | 6202-23-9 | C20H21N : HCl | 275.4 : 36.5 |
| c | Amitriptyline EP Impurity G | 5-Hydroxy-10,11-dihydro-5H-dibenzo[a,d][7]annulene
Synonyms:Dibenzo(b,f)cycloheptan-1-ol;1,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-ol | 1210-34-0 | C15H14O | 210.3 |
| 13 | Amlodipine Besylate Impurities |
| a | Impurity A (USP Related compound-D) | 3-Ethyl 5-methyl 4-(2-chlorophenyl)-2-((2-(1,3-dioxoisoindolin-2-yl)ethoxy)methyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate, | 88150-62-3 | C28H27ClN2O7 | 539 |
| b | Impurity B (USP Related compound-B) | 3-Ethyl 5-methyl 4-(2-chlorophenyl)-6-methyl-2-((2-(2-(methylcarbamoyl)benzamido)ethoxy)methyl)-1,4-dihydropyridine-3,5-dicarboxylate | 721958-72-1 | C29H32ClN3O7 | 570.1 |
| c | Impurity D (Amlodipine Related Compound A ) | 3-Ethyl 5-methyl 2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methylpyridine-3,5-dicarboxylate | 113994-41-5 | C20H23ClN2O5 | 406.9 |
| d | Impurity G | Dimethyl 4-(2-chlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate | 43067-01-2 | C17H18ClNO4 | 335.8 |
| e | Impurity H | 2-((2-((4-(2-Chlorophenyl)-3-(ethoxycarbonyl)-5-(methoxycarbonyl)-6-methyl-1,4-dihydropyridin-2-yl)methoxy)ethyl)carbamoyl)benzoic acid | 318465-73-5 | C28H29ClN2O8 | 557 |
| 14 | Amiodarone Impurities |
| a | Amiodarone Hydrochloride | (2-Butylbenzofuran-3-yl)(4-(2-(diethylamino)ethoxy)-3,5-diiodophenyl)methanone hydrochloride | 19774-82-4 | C25H29I2NO3 : HCl | 645.3 : 36.5 |
| b | Amiodarone EP Impurity D | (2-Butylbenzofuran-3-yl)(4-hydroxy-3,5-diiodophenyl)methanone, | 1951-26-4 | C19H16I2O3 | 546.1 |
| 15 | Aspartame Impurities |
| a | Aspartame RS | (S)-3-Amino-4-(((S)-1-methoxy-1-oxo-3-phenylpropan-2-yl)amino)-4-oxobutanoic acid | 22839-47-0 | C14H18N2O5 | 294.3 |
| b | Aspartame EP Impurity B | (S)-3-Amino-4-(((S)-1-carboxy-2-phenylethyl)amino)-4-oxobutanoic acid, | 13433-09-5 | C13H16N2O5 | 280.3 |
| 16 | Atenolol Impurities |
| a | Atenolol EP Impurity A | 4-Hydroxyphenylacetamide | 17194-82-0 | C8H9NO2 | 151.2 |
| 17 | Aripiprazole Impurities |
| a | Aripiprazole EP Impurity A | 7-Hydroxy-3,4-dihydroquinolin-2(1H)-one
Synonyms:3,4-Dihydro-7-hydroxy-2(1H)-quinolinone | 22246-18-0 | C9H9NO2 | 163.2 |
| 18 | Atorvastatin Impurities |
| a | Atorvastatin Calcium Trihydrate | Calcium (3R,5R)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate trihydrate | 44423-98-9 | C33H34FN2O5 : 1/2(Ca) : 3/2H2O | 557.6 : 1/2(40.1) : 3/2(18.0) |
| b | Atorvastatin Diketo Amide Impurity | 2-(2-(4-Fluorophenyl)-2-oxo-1-phenylethyl)-4-methyl-3-oxo-N-phenylpentanamide | 125971-96-2 | C26H24FNO3 | 417.5 |
| 19 | Benserazide Impurities |
| a | Benserazide Hydrochloride | 2-Amino-3-hydroxy-N'-(2,3,4-trihydroxybenzyl)propanehydrazide hydrochloride, | 14919-77-8 | C10H15N3O5 : HCl | 257.2 : 36.5 |
| b | Benserazide EP Impurity A | DL-Serine Hydrazide Hydrochloride | 55819-71-1 | C3H9N3O2 : HCl | 119.1 : 36.5 |
| 20 | Bisoprolol impurities |
| a | Bisoprolol EP Impurity S | 4-Hydroxybenzaldehyde | 123-08-0 | C7H6O2 | 122.1 |
| 21 | Bilastine Impurities |
| a | Bilastine | 2-(4-(2-(4-(1-(2-Ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic acid, | 202189-78-4 | C28H37N3O3 | 463.6 |
| 22 | Brimonidine impurities |
| a | Brimonidine RS | N/A | 59803-98-5 | C11H10BrN6 | 293.1 |
| b | Brimonidine EP Impurity A | N-(4,5-Dihydro-1H-imidazol-2-yl)quinoxalin-6-amine | 91147-43-2 | C11H11N5 | 213.2 |
| c | Brimonidine EP Impurity B | 6-Amino-5-bromoquinoxaline | 50358-63-9 | C8H6BrN3 | 224.1 |
| d | Brimonidine EP Impurity C | Quinoxalin-6-amine | 6298-37-9 | C8H7N3 | 145.2 |
| e | Brimonidine EP Impurity D | 1-(5-Bromoquinoxalin-6-yl)thiourea | 842138-74-3 | C9H7BrN4S | 283.2 |
| 23 | Bisacodyl Impurities |
| a | Bisacodyl RS | (Pyridin-2-ylmethylene)bis(4,1-phenylene) diacetate | 603-50-9 | C22H19NO4 | 361.4 |
| b | Bisacodyl EP Impurity A | 4,4'-(Pyridin-2-ylmethylene)diphenol | 603-41-8 | C18H15NO2 | 277.3 |
| c | Bisacodyl EP Impurity B | 2-((4-Hydroxyphenyl)(pyridin-2-yl)methyl)phenol | 16985-05-0 | C18H15NO2 | 277.3 |
| 24 | Brexpiprazole Impurities |
| a | Brexpiprazole base | N/A | 913611-97-9 | N/A | N/A |
| b | Brexpiprazole Impurity-1 | 1-(Benzo[b]thiophen-4-yl)piperazine hydrochloride | 913614-18-3 | C12H14N2S : HCl | 218.3 : 36.5 |
| c | Brexpiprazole Impurity-2 | 4-Bromobenzo[b]thiophene | 5118-13-8 | C8H5BrS | 213.1 |
| d | Brexpiprazole Impurity-3 | 7-(4-Chlorobutoxy)quinolin-2(1H)-one, | 913613-82-8 | C13H14ClNO2 | 251.7 |
| e | Brexpiprazole N-Oxide | 7-[4-(4-Benzo[b]thien-4-yl-1-oxido-1-piperazinyl)butoxy]-2(1H)-quinolinone | 1191900-58-9 | C25H27N3O3S | 449.6 |
| f | Brxpiprazole Bromo | 4-Bromo-2,3-dihydrobenzo[b]thiophene | 203395-59-9 | C13H14BrNO2 | 296.2 |
| j | Brexpiprazole Alcohol | 7-(4-Hydroxybutoxy)quinolin-2(1H)-one | 1886188-97-1 | C13H15NO3 | 233.3 |
| h | Brexpiprazole Dimer | 7,7`-(Butane-1,4-diylbis(oxy))bis(quinolin-2(1H)-one) | 2116542-19-7 | C22H20N2O4 | 376.4 |
| i | 7-Hydroxyquinolinone | 7-Hydroxy-2(1H)-quinolinone; 7-Hydroxy-1H-quinolin-2-one | 70500-72-0 | C9H7NO2 | 161.16 |
| 25 | Butenafine Impurities |
| a | Butenafine Hydrochloride RS | N-(4-(tert-Butyl)benzyl)-N-methyl-1-(naphthalen-1-yl)methanamine hydrochloride | 101827-46-7 | C23H27N : HCl | 317.5 : 36.5 |
| b | Butenafine Impurity-1 | 1-(tert-Butyl)-4-(chloromethyl)benzene | 19692-45-6 | C11H15Cl | 182.7 |
| c | Butenafine Impurity-2 | N-Methylnaphthalen-1-amine | 2216-68-4 | C11H11N | 157.2 |
| 26 | Carbamazepine Impurities |
| a | Carbamazepine RS | 5H-Dibenzo[b,f]azepine-5-carboxamide | 298-46-4 | C15H12N2O | 236.3 |
| c | Carbamazepine EP Impurity A | 10,11-Dihydro-5H-dibenzo[b,f]azepine-5-carboxamide | 3564-73-6 | C15H14N2O | 238.3 |
| d | Carbamazepine EP Impurity B | 9-Methylacridine | 611-64-3 | C14H11N | 193.2 |
| e | Carbamazepine EP Impurity D | 5H-Dibenzo[b,f]azepine | 256-96-2 | C14H11N | 193.2 |
| f | Carbamazepine EP Impurity E | 10,11-Dihydro-5H-dibenzo[b,f]azepine | 494-19-9 | C14H13N | 195.3 |
| j | Carbamazepine EP Impurity G | 10-Bromo-5H-dibenzo[b,f]azepine-5-carboxamide | 59690-97-0 | C15H11BrN2O | 315.2 |
| 27 | Carvedilol Phosphate |
| a | Carvedilol USP Related Compound D | 4-Glycidyloxycarbazole | 51997-51-4 | C15H13NO2 | 239.3 |
| b | Carvedilol USP Related Compound E | 2-(2-Methoxyphenoxy)ethylamine | 1836-62-0 | C9H13NO2 | 167.2 |
| c | Carvedilol 4-Hydroxycarbazole Impurity | 9H-Carbazol-4-ol | 52602-39-8 | C12H9NO | 183.2 |
| 28 | Celecoxib |
| a | Celecoxib RS | 4-(5-(p-Tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide | 169590-42-5 | C17H14F3N3O2S | 381.4 |
| b | Celecoxib USP Related Compound D | 4-(2-(1-(p-Tolyl)ethylidene)hydrazinyl)benzenesulfonamide | 1061214-06-9 | C15H17N3O2S | 303.4 |
| c | Celecoxib EP Impurity G | 4,4,4-Trifluoro-1-(p-tolyl)butane-1,3-dione | 720-94-5 | C11H9F3O2 | 230.2 |
| 29 | Captopril Impurities |
| a | Captopril RS | (S)-1-((S)-3-mercapto-2-methylpropanoyl)pyrrolidine-2-carboxylic acid | 2571-86-2 | C9H15NO3S | 217.3 |
| b | Captopril EP Impurity D | 3-Bromo-2-methylpropanoic acid | 56970-78-6 | C4H7BrO2 | 167 |
| 30 | Cetirizine Impurities |
| a | Cetirizine Dihydrochloride RS | 2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)acetic acid dihydrochloride | 83881-52-1 | C21H25ClN2O3 : 2(HCl) | 388.9 : 2(36.5) |
| b | Cetirizine EP Impurity A | 1-((4-Chlorophenyl)(phenyl)methyl)piperazine | 303-26-4 | C17H19ClN2 | 286.8 |
| c | Cetirizine EP Impurity D | 1,4-Bis((4-chlorophenyl)(phenyl)methyl)piperazine dihydrochloride | 856841-95-7 | C30H28Cl2N2 : 2(HCl) | 487.7: 2(36.5) |
| d | Cetirizine 4-CBH impurity (USP) | 4-Chlorobenzhydrol | 119-56-2 | C13H11ClO | 218.7 |
| e | Cetirizine 4-Chlorobenzophenone Impurity (USP) | 4-Chlorobenzophenone | 134-85-0 | C13H9ClO | 216.7 |
| f | Nitrosoamine impurity of Cetirizine EP Impurity A |
| 31 | Chlorphenamine Impurities |
| a | Chlorphenamine Maleate | 3-(4-Chlorophenyl)-N,N-dimethyl-3-(pyridin-2-yl)propan-1-amine maleate | 113-92-8 | C16H19ClN2 : C4H4O4 | 274.8 : 116.1 |
| b | Chlorphenamine EP Impurity B | Di(pyridin-2-yl)amine | 202-34-2 | C10H9N3 | 171.2 |
| 32 | Ciclopirox Impurities |
| a | Ciclopirox | 6-Cyclohexyl-1-hydroxy-4-methylpyridin-2(1H)-one 2-aminoethanol salt | 41621-49-2 | C12H17NO2 : C2H7NO | 207.3 : 61.1 |
| b | Ciclopirox EP Impurity B | 6-Cyclohexyl-4-methyl-2H-pyran-2-one | 14818-35-0 | C12H16O2 | 192.3 |
| 33 | Cinacalcet Impurities |
| a | Cinacalcet HCl RS | (R)-N-(1-(Naphthalen-1-yl)ethyl)-3-(3-(trifluoromethyl)phenyl)propan-1-amine hydrochloride | 364782-34-3 | C22H22F3N : HCl | 357.4 : 36.5 |
| b | Cinacalcet USP Related Compound D | ent-Cinacalcet Hydrochloride | 1217809-88-5 | C22H22F3N : HCl | 357.4 : 36.5 |
| c | Cinacalcet Impurity A | (R)-1-(Naphthalen-1-yl)ethanamine hydrochloride | 82572-04-1 | C12H13N : HCl | 171.2 : 36.5 |
| d | Cinacalcet Impurity B | (R)-N-Benzyl-1-(naphthalen-1-yl)ethanamine hydrochloride | 163831-65-0 | C19H19N : HCl | 261.4 : 36.5 |
| e | Nitrosamine imp of Cinacalcet |
| 34 | Clenbuterol Hydrochloride |
| a | Clenbuterol EP Impurity A | 4-Amino-3,5-dichlorobenzaldehyde | 62909-66-4 | C7H5Cl2NO | 190 |
| b | Clenbuterol EP Impurity B | 1-(4-Amino-3,5-dichlorophenyl)-2-[(1,1-dimethylethyl)amino]ethanone | 37148-49-5 | C12H16Cl2 N2O | 275.17 |
| c | Clenbuterol EP Impurity C | 4'-Amino-3',5'-dichloroacetophenone | 37148-48-4 | C8H7Cl2NO | 204.1 |
| d | Clenbuterol EP Impurity D | 1-(4-Aminophenyl)ethanone | 99-92-3 | C8H9NO | 135.16 |
| e | Clenbuterol EP Impurity E | 1-(4-Amino-3,5-dichlorophenyl)-2-bromoethanone | 37148-47-3 | C8H6BrCl2 NO | 282.94 |
| f | Clenbuterol EP Impurity F | (1RS)-1-(4-Amino-3-bromo-5-chlorophenyl)-2-[(1,1-dimethylethyl)amino]ethanol | 37153-52-9 | C12H18BrCl N2O | 321.64 |
| g | Mono chloro impurity | 1-(4-amino-3-chlorophenyl)ethan-1-one | 6953-83-9 | C8H8Cl NO | 169.61 |
| 35 | Ciprofloxacin Impurities |
| a | Ciprofloxacin EP Impurity A | 7-Chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid | 86393-33-1 | C13H9ClFNO3 | 281.7 |
| b | N-Nitroso Ciprofloxacin | N/A | 864443-44-7 | C17H17FN4O4 | 360.3 |
| c | N-Nitroso Ciprofloxacin EP Impurity C | N/A | N/A | C15H15FN4O4 | 334.3 |
| 36 | Clotrimazole Impurities |
| a | Clotrimazole EP Impurity C | (Chloro(2-chlorophenyl)methylene)dibenzene | 42074-68-0 | C19H14Cl2 | 313.2 |
| b | Clotrimazole EP Impurity D | 1H-Imidazole | 288-32-4 | C3H4N2 | 68 |
| c | Clotrimazole EP Impurity E | (2-Chlorophenyl)(phenyl)methanone | 1191489 | C13H9ClO | 216.6 |
| d | Clotrimazole EP Impurity F | 1-Trityl-1H-imidazole | 15469-97-3 | C22H18N2 | 310.4 |
| e | Clotrimazole Deschloroanaloge | Chloromethanetriyl)tribenzene | 76-83-5 | N/A | N/A |
| 37 | Cyclizine Impurities |
| a | Cyclizine |
| b | Cyclizine Hydrochloride EP Impurity B | Diphenylmethanol, | 91-01-0 | C13H12O | 184.2 |
| c | Cyclizine Hydrochloride EP Impurity A | 1-Methylpiperazine | 109-01-3 | C5H12N2 | 100.2 |
| 38 | Dabigatran Impurities |
| a | Dabigatran Etexilate RS | Hexyl 2-(4-(((5-((3-ethoxy-3-oxopropyl)(pyridin-2-yl)carbamoyl)-1-methyl-1H-benzo[d]imidazol-2-yl)methyl)amino)benzylidene)hydrazinecarboxylate | 211915-06-9 | C34H41N7O5 | 627.7 |
| 39 | Deferasirox Impurities |
| a | Deferasirox RS | 4-(3,5-Bis(2-hydroxyphenyl)-1H-1,2,4-triazol-1-yl)benzoic acid | 201530-41-8 | C21H15N3O4 | 373.4 |
| b | Deferasirox Benzamide Impurity | 2-Hydroxybenzamide | 65-45-2 | C7H7NO2 | 137.1 |
| c | Deferasirox EP Impurity A | 2-Hydroxy-N-(2-hydroxybenzoyl)benzamide | 1972-71-0 | C14H11NO4 | 257.2 |
| d | Deferasirox EP Impurity F | 4-Hydrazinylbenzoic acid | 619-67-0 | C7H8N2O2 | 152.2 |
| 40 | Dicycloverine impurities |
| a | Dicycloverine EP Impurity A | [1,1'-Bi(cyclohexane)]-1-carboxylic acid | 0263-54-9 | C13H22O2 | 210.3 |
| b | Dicycloverine Impurity 1 | Bicyclohexyl | 92-51-3 | C12H22 | 166.3 |
| 41 | Diclofenac Impurities |
| a | Diclofenac Sodium RS |
| b | Diclofenac EP Impurity A | 1-(2,6-Dichlorophenyl)-2-indolinone | 15362-40-0 | C14H9Cl2NO | 278.1 |
| c | Diclofenac EP Impurity B | 2-((2,6-Dichlorophenyl)amino)benzaldehyde | 22121-58-0 | C13H9Cl2NO | 266.1 |
| d | Diclofenac EP Impurity C | (2-((2,6-Dichlorophenyl)amino)phenyl)methanol | 27204-57-5 | C13H11Cl2NO | 268.1 |
| e | Diclofenac EP Impurity D (Diclofenac bromo analogue | 2-(2-((2-Bromo-6-chlorophenyl)amino)phenyl)acetic acid | 127792-23-8 | C14H11BrClNO2 | 340.6 |
| f | Diclofenac EP Impurity E | Indolin-2-one | 59-48-3 | C8H7NO | 133.2 |
| g | Diclofenac EP Impurity F | N-(4-Chlorophenyl)-2-(2,6-dichlorophenyl)acetamide | 560075-65-2 | C14H10Cl3NO | 314.6 |
| h | N-Nitroso Diclofenac | 2-(2-((2,6-Dichlorophenyl)(nitroso)amino)phenyl)acetic acid | 66505-80-4 | C14H10Cl2N2O3 | 325.1 |
| i | Diclofenac benzaldehyde analogue | 2-[(2,6-Dichlorophenyl)amino]benzaldehyde | 22121-58-0 | C13H9Cl2NO | 266.12 |
| j | Diclofenac alcohol analogue | {2-[(2,6-dichlorophenyl)amino]phenyl}methanol | 27204-57-5 | C13H11Cl2NO | 268.14 |
| k | Diclofenac Keto analog | 2-[(2,6-Dichlorophenyl)amino]phenyl-2-oxoacetic acid | 66156-75-0 | C14H8Cl2NNaO3 | 332.11 |
| l | Diclofenac BP Impurity-A | 1-(2,6-Dichlorophenyl)-2-indolinone | 15362-40- 0 | C14H9Cl2NO | 278.13 |
| 42 | Dicloxacllin Impurities |
| a | Dicloxacillin EP Impurity A | (2R,4S)-2-((R)-Carboxy(3-(2,6-dichlorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic acid | 42947-69-3 | C19H19Cl2N3O6S | 488.3 |
| b | Dicloxacillin EP Impurity C | (2S,5R,6R)-6-Amino-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid | 551-16-6 | C8H12N2O3S | 216.3 |
| c | Dicloxacillin EP Impurity D | 3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid | 3919-76-4 | C11H7Cl2NO3 | 272.1 |
| 43 | Donepezil Impurities |
| a | Donepezil HCL RS | 2-((1-Benzylpiperidin-4-yl)methyl)-5,6-dimethoxy-2,3-dihydro-1H-inden-1-one hydrochloride | 120011-70-3 | C24H29NO3 : HCl | 379.5 : 36.5 |
| b | Donepezil EP Impurity F | (E)-2-((1-Benzylpiperidin-4-yl)methylene)-5,6-dimethoxy-2,3-dihydro-1H-inden-1-one | 145546-80-1 | C24H27NO3 | 377.5 |
| c | Hydroxy Donepezil | 2-((1-Benzylpiperidin-4-yl)(hydroxy)methyl)-5,6-dimethoxy-2,3-dihydro-1H-inden-1-one | 197010-20-1 | C24H29NO4 | 395.5 |
| d | Donepezil Benzyl Bromide | 1,1-Dibenzyl-4-((5,6-dimethoxy-1-oxo-2,3-dihydro-1H-inden-2-yl)methyl)piperidin-1-ium bromide | 844694-85-5 | C31H36NO3 : Br | 470.6 : 79.9 |
| e | Dehydrodeoxy Donepezil | 1-Benzyl-4-((5,6-dimethoxy-1H-inden-2-yl)methyl)piperidine | 120013-45-8 | C24H29NO2 | 363.5 |
| f | Deoxy Donepezil | 1-Benzyl-4-((5,6-dimethoxy-2,3-dihydro-1H-inden-2-yl)methyl)piperidine hydrochloride | 1034439-57-0 | C24H31NO2 : HCl | 365.5 : 36.5 |
| g | Donepezil EP Impurity A | 5,6-Dimethoxy-2-(piperidin-4-ylmethyl)-2,3-dihydro-1H-inden-1-one | 120014-30-4 | C17H23NO3 | 289.4 |
| h | Donepezil N-Oxide | 1-Benzyl-4-((5,6-dimethoxy-1-oxo-2,3-dihydro-1H-inden-2-yl)methyl)piperidine 1-oxide | 120013-84-5 | C24H29NO4 | 395.5 |
| i | Donepezil EP Impurity D | 5,6-Dimethoxy-2-(pyridin-4-ylmethyl)-2,3-dihydro-1H-inden-1-one | 4803-57-0 | C17H17NO3 | 283.3 |
| j | Donepezil Aldehyde Impurity | 1-Benzylpiperidine-4-carbaldehyde | 22065-85-6 | C13H17NO | 203.3 |
| k | Donepezil EP Impurity B | 5,6-Dimethoxy-2,3-dihydro-1H-inden-1-one | 2107-69-9 | C11H12O3 | 192.2 |
| l | Donepezil Impurity | 4-Pyridinecarboxaldehyde | 872-85-5 | C6H5NO | 107.11 |
| m | N-Nitroso Donepezil EP Impurity A | N/A | N/A | C17H22N2O4 | 318.4 |
| 44 | Doxepin |
| a | Doxepin EP impurity A | Dibenzo[b,e]oxepin-11(6H)-one | 4504-87-4 | C14H10O2 | 210.23 |
| b | Doxepin EP impurity C | (E)-3-(Dibenzo[b,e]oxepin-11(6H)-ylidene)-N-methylpropan-1-amine hydrochloride | 4504-96-5 | C18H20ClNO | 301.81 |
| 45 | Duloxetine Impurities |
| a | Duloxetine Hydrochloride | N/A | 136434-34-9 | C18H19NOS : HCl | 297.4 : 36.5 |
| b | Duloxetine EP Impurity B | (S)-(-)-3-(N-Methylamino)-1-(2-thienyl)-1-propanol | 116539-55-0 | C8H13NOS | 171.3 |
| c | Duloxetine EP Impurity D | 1-Naphthol | 90-15-3 | C10H8O | 144.2 |
| d | Duloxetine EP Impurity G | 1-Fluoronaphthalene | 321-38-0 | C10H7F | 146.2 |
| e | n-Nitroso Duloxetine | (S)-N-methyl-N-(3-(naphthalen-1-yloxy)-3-(thiophen-2-yl)propyl)nitrous amide. | 2680527-91-5 | C18H18N2O2S | 326.4 |
| f | 1-Naphthylamine | Naphthalene-1-amine | 134-32-7 | C10H9N | 143.19 |
| g | 1-(thiophen-2-yl)ethanone | 1-(thiophen-2-yl)ethanone | 88-15-3 | C6H6OS | 126.17 |
| 46 | Dicycloverine impurities |
| a | Dicycloverine EP Impurity A | [1,1'-Bi(cyclohexane)]-1-carboxylic acid | 0263-54-9 | C13H22O2 | 210.3 |
| b | Dicycloverine Impurity 1 | Bicyclohexyl | 92-51-3 | C12H22 | 166.3 |
| 47 | Felodipine impurities |
| a | Felodipine RS | 3-Ethyl 5-methyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate | 72509-76-3 | C18H19Cl2NO4 | 384.3 |
| b | Felodipine EP Impurity A | 3-Ethyl 5-methyl 4-(2,3-dichlorophenyl)-2,6-dimethylpyridine-3,5-dicarboxylate | 96382-71-7 | C18H17Cl2NO4 | 382.2 |
| c | Felodipine EP Impurity B | Dimethyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate | 91189-59-2 | C17H17Cl2NO4 | 370.2 |
| d | Felodipine EP Impurity C | Diethyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate | 79925-38-5 | C19H21Cl2NO4 | 398.3 |
| e | Felodipine Impurity 1 | Methyl 2-(2,3-dichlorobenzylidene)-3-oxobutanoate | 74073-22-6 | C12H10Cl2O3 | 273.1 |
| f | N-Nitroso-Felodipine | 3-Ethyl 5-methyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1-nitroso-1,4-dihydropyridine-3,5-dicarboxylate; | N/A | C18H18Cl2N2O5 | 413.3 |
| 48 | Famotidine Impurities |
| a | Famotidine Impurity A | 3-[[[2-[(Diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]propanimidamide | 124646-10-2 | C8H14N6S2 | 258.36 |
| 49 | Glycopyrronium Bromideimpurities |
| a | Glycopyrronium Bromide EP Impurity B | 2-Oxo-2-phenylacetic acid | 611-73-4 | C8H6O3 | 150.1 |
| b | Glycopyrronium Bromide EP Impurity C | 2-Hydroxy-2-phenylacetic acid | 90-64-2 | C8H8O3 | 152.2 |
| c | Glycopyrronium Bromide EP Impurity D | Benzoic acid | 65-85-0 | C7H6O2 | 122.1 |
| d | Glycopyrronium Bromide EP Impurity F | Benzaldehyde | 100-52-7 | C7H6O | 106.1 |
| e | Glycopyrronium Bromide EP Impurity H | Methyl 2-oxo-2-phenylacetate | 15206-55-0 | C9H8O3 | 164.2 |
| f | Glycopyrronium Bromide EP Impurity K | 2-Cyclopentyl-2-phenylacetic acid | 3900-93-4 | C13H16O2 | 204.3 |
| g | Glycopyrronium Bromide EP Impurity M | Cyclopentyl(phenyl)methanone | 5422-88-8 | C12H14O | 174.2 |
| h | Glycopyrronium Bromide EP Impurity O | 5-Nitroisophthalic acid | 618-88-2 | C8H5NO6 | 211.1 |
| i | Glycopyrronium Bromide EP Impurity G | 1-Methylpyrrolidin-3-yl 2-cyclopentyl-2-hydroxy-2-phenylacetate hydrochloride | 13118-10-0 | C18H25NO3 : HCl | 303.4 : 36.5 |
| j | Glycopyrronium Bromide EP Impurtiy J and enantiomer | alpha-Cyclopentylmandelic Acid | 427-49-6 | C13H16O3 | 220.3 |
| k | Glycopyrronium Bromide EP Impurity L and enantiomer | Methyl 2-cyclopentyl-2-hydroxy-2-phenylacetate | 19833-96-6 | C14H18O2 | 218.3 |
| 50 | Gabapentin Impurities |
| a | Gabapentin EP Impurity A | 2-Azaspiro[4.5]decan-3-one | 64744-50-9 | C9H15NO | 153.2 |
| 51 | Hydroxyzine |
| a | Hydroxyzine impurity A | 1-((4-Chlorophenyl)(phenyl)methyl)piperazine | 303-26-4 | C17H19ClN2 | 286.8 |
| b | Hydroxyzine impurity B | 2-(2-(4-Benzhydrylpiperazin-1-yl)ethoxy)ethanol hydrochloride | 1263283-80-2 | C21H29ClN2O2 | 376.92 |
| 52 | Levomepromazine Impurity |
| a | Levomepromazine Maleate RS | N/A | 7104-38-3 | C19H24N2OS : C4H4O4 | 328.5 : 116.1 |
| b | Levomepromazine EP Impurity A | 2-Methoxyphenothiazine | 1771-18-2 | C13H11NOS | 229.3 |
| c | Reagennt | 3-Chloro-N,N,2-trimethylpropan-1-amine hydrochloride | 4261-67-0 | C6H14ClN | 135.6 |
| d | Levomepromazine EP Impurity B | 10-[(2R)-3-(Dimethylamino)-2-methylpropyl]-2-methoxy-5λ4 -phenothiazin-5(10H)-one | 7606-29-3 | C19H24N2O2S | 344.5 |
| e | Levomepromazine EP Impurity C (n-desmethyl levomepromazine) | (2R)-3-(2-Methoxy-10H-phenothiazin-10-yl)-N,2-dimethylpropan-1-amine | 37819-98-0 | C18H22N2OS | 314.4 |
| 53 | Levonorgestrel Impurity |
| a | Levonorgestrel - Impurity M | 6(7)-Dehydro Norgestrel | 51087-61-7 | C21H26O2 | 310.43 |
| 54 | Loperamide Impurity |
| a | Loperamide N-Oxide | 4-(4-Chlorophenyl)-1-(4-(dimethylamino)-4-oxo-3,3-diphenylbutyl)-4-hydroxypiperidine 1-oxide; | 217471-03-9 | C29H33ClN2O3 | 493.04 |
| 55 | Linagliptin impurity |
| a | Linagliptin S isomer | (S)-8-(3-Aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7H)-dione | 668270-11-9 | N/A | N/A |
| b | N-BOC impurity of Linagliptin | (R)-tert-Butyl (1-(7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)piperidin-3-yl)carbamate | 668273-75-4 | N/A | N/A |
| 56 | Liothyronine Impurities |
| a | Liothyronine EP Impurity A | O-(4-Hydroxy-3, 5-diiodophenyl)-3, 5-diiodo-L-tyrosine | 51-48-9 | C₁₅H₁₁I₄NO₄ | 776.87 |
| b | Liothyronine EP Impurity C | 2-(4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl)acetic acid | 51-24-1 | C14H9I3O4 | 621.9 |
| c | Liothyronine EP Impurity D |
| d | Liothyronine EP Impurity E | (S)-2-Amino-3-(4-(4-hydroxyphenoxy)-3,5-diiodophenyl)propanoic acid | 1041-01-6 | C15H13I2NO4 | 525.1 |
| 57 | Methotrexate Impurities |
| a | Methotrexate EP Impurity A | (2,4-Diaminopteridin-6-yl)methanol | 945-24-4 | C7H8N6O | 192.1 |
| b | Methotrexate EP Impurity C | N-methylfolic Acid; Methopterine; (2S)-2-[[4-[[(2-amino-4-hydroxypteridin-6-yl)methyl]methylamino]benzoyl]amino]pentanedioic Acid | 2410-93-7 | C20H21N7O6 | 455.42 |
| c | Methotrexate EP Impurity D | 4-(((2-Amino-4-oxo-3,4-dihydropteridin-6-yl)methyl)(methyl)amino)benzoic acid | 5623-18-7 | C15H14N6O3 | 326.3 |
| d | Methotrexate EP Impurity E | 4-(((2,4-Diaminopteridin-6-yl)methyl)(methyl)amino)benzoic acid | 19741-14-1 | C15H15N7O2 | 325.3 |
| 58 | Mebeverine Impurities |
| a | Mebeverine EP- Impurity -A | 4-Methoxyphenylacetone | 122-84-9 | C10H12O2 | 164.2 |
| b | Mebeverine EP- Impurity -B | N/A | 14367-46-5 | C12H19NO | 193.3 |
| c | Mebeverine EP- Impurity -C | Mebeverine metabolite Mebeverine alcoho | 14367-47-6 | C16H27NO2 | 265.4 |
| d | Mebeverine EP- Impurity -D | 3,4-Dimethoxybenzoic acid | 93-07-2 | C9H10O4 | 182.2 |
| 59 | Metformin Impurities |
| a | Metformin HCl WRS | 1,1-Dimethylbiguanide Hydrochloride | 1115-70-4 | C4H11N5 : HCl | 129.2 : 36.5 |
| c | Metformin EP Impurity A | N-Cyanoguanidine, | 461-58-5 | C2H4N4 | 84.1 |
| d | Metformin EP Impurity D | 1,3,5-Triazine-2,4,6-triamine | 108-78-1 | C3H6N6 | 126.12 |
| 60 | Melatonin Impurities |
| a | Melatonin | N-(2-(5-Methoxy-1H-indol-3-yl)ethyl)acetamide | 73-31-4 | C13H16N2O2 | 232.3 |
| b | Melatonin EP Impurity A | N/A | 50-67-9 | C10H12N2O : HCl | 176.2 : 36.5 |
| c | Melatonin EP Impurity B | N-(2-(5-Hydroxy-1H-indol-3-yl)ethyl)acetamide | 1210-83-9 | C12H14N2O2 | 218.3 |
| d | Melatonin EP Impurity C | N/A | 608-07-1 | C11H14N2O | 190.2 |
| e | Melatonin EP Impurity D | N-acetyl-5-acetoxytryptamine | 28026-16-6 | C14H16N2O3 | 260.3 |
| f | Melatonin Impurity-1 | 2-(5-Methoxy-1H-indol-3-yl)acetonitrile | 2436-17-1 | C11H10N2O | 186.2 |
| 61 | Midodrine Impurities |
| a | Midodrine USP Related Compound A | 2-amino-1-(2,5-dimethoxyphenyl)ethan-1-ol | 60407-53-6 | C10H15NO3 : HCl | 197.2 : 36.5 |
| b | RM | 1,4-Dimethoxybenzene | 150-78-7 | C10H8O2 | 138.7 |
| 62 | Meclizine Impurity |
| a | Meclizine Impurity B | 4-Chlorobenzhydrol (4- CBH) | 119-56-2 | C13H11ClO | 218.7 |
| 63 | Nicardipine Impurities |
| a | Nicardipine Related compound- B (Nicardipine Pyridine analog) | 3-{2-[Benzyl(methyl)amino]ethyl} 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)pyridine-3,5-dicarboxylate, Hydrochloride | 1216817-27-4 | C26H27N3O6 .HCl | 513.97 |
| 64 | Pregabalin Impurities |
| a | Pregabalin Impurity-A | (S)-4-Isobutylpyrrolidin-2-one, | 181289-23-6 | C8H15NO | 141.2 |
| b | Pregabalin Impurity-B (USP Related Compound-A) | (3R)-3-(Aminomethyl)-5-methylhexanoic Acid | 148553-51-9 | C8H17NO2 | 159.2 |
| c | Pregabalin Impurity-C (USP impurity) | Mendalic Acid (2-Hydroxy-2-phenylacetic acid) | 90-64-2 | C8H8O3 | 152.2 |
| d | Pregabalin Impurity-D | Isopropyl 2-hydroxy-2-phenylacetate | 4118-51-8 | C11H14O3 | 194.2 |
| e | Pregabalin Impurity-1 (USP impurity) | Isobutylglutarmonoamide (3-(2-Amino-2-oxoethyl)-5-methylhexanoic acid) | 181289-15-6 | C9H17NO3 | 187.2 |
| f | Pregabalin Impurity-2 (USP impurity) (Isobutylglutaric acid) | 3-Isobutylpentanedioic acid | 75143-89-4 | C9H16O4 | 188.2 |
| g | Pregabalin Related compound-C | 4-Isobutylpyrrolidin-2-one | 61312-87-6 | C8H15NO | 141.2 |
| 65 | Paracetamol Impurities |
| a | Paracetamol RS | Acetaminophen | 103-90-2 | C8 H9 N O2 | 151.16 |
| b | Paracetamol EP Impurity A | N-(2-Hydroxyphenyl)acetamide | 614-80-2 | C8H9NO2 | 151.2 |
| c | Paracetamol EP Impurity B | N-(4-Hydroxyphenyl)propanamide | 1693-37-4 | C9H11NO2 | 165.2 |
| d | Paracetamol EP Impurity C | N-(3-Chloro-4-hydroxyphenyl)acetamide | 3964-54-3 | C8H8ClNO2 | 185.6 |
| e | Paracetamol EP Impurity D | N-Phenyl acatamide | 103-84-4 | C8H9NO | 135.16 |
| f | Paracetamol EP Impurity E | 4'-Hydroxyacetophenone | 99-93-4 | C8H8O2 | 136.2 |
| g | Paracetamol EP Impurity F | 4-Nitrophenol | 100-02-7 | C6H5NO3 | 139.11 |
| h | Paracetamol EP Impurity G | 1-(4-Hydroxyphenyl)ethanone oxime | 34523-34-7 | C8H9NO2 | 151.2 |
| i | Paracetamol EP Impurity H | 4-Acetamidophenyl acetate | 2623-33-8 | C10H11NO3 | 193.2 |
| j | Paracetamol EP Impurity I | N-(5-acetamido-2-hydroxyphenyl)-N-(4-hydroxyphenyl)acetamide | 118-93-4 | C8H8O2 | 136.2 |
| k | Paracetamol EP Impurity J | N-(4-Chlorophenyl)acetamide (4-chloroacetanilide ) | 539-03-7 | C8H8ClNO | 169.6 |
| l | Paracetamol EP Impurity K | P- Aminophenol ,1-Amino-4-hydroxy benzene | 123-30-8 | C6H7NO | 109.1 |
| 66 | Telmisartan impurities |
| a | Telmisartan Related Compound-A/ Telmisartan Impurity-A | 2-n-Propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazole Monohydrate | 1282554-35-1 | C19H20N4.H2O | 322.41 |
| 67 | Zolidronic acid impurities |
| a | Imidazole acetic acid | 2-(1H-Imidazol-1-yl)acetic acid | 22884-10-4 | C5H6N2O4 | 128.1 |
