Active pharmaceutical ingredient (API) impurities for research

N-Methylphthalimide

2-Chloro-10-(2-diethylaminoethyl)-9,10-dihydroacridin-9-one

(Z)-2-Phenylbut-1-enyl 3,4,5-Trimethoxybenzoate

Dapsone

Dihydrocodeine N-Oxide

3-Oxoandrosta-4,6-dien-17beta-yl Propanoate

(RS)-N-(4-Methyl-phenyl)-2-(propylamino)propanamide Hydrochloride

1-(4-Isopropylphenyl)ethanone (4-Isopropylacetophenone)

1-(2-Deoxy-2,2-difluoro-beta-D-erythro-pentofuranosyl)pyrimidin-2,4(1H,3H)-dione (2'-Deoxy-2',2'-difluorouridine)

Mequinol

(2RS)-1-(Isopropylamino)-3-(4-methylphenoxy)propan-2-ol

5-(Hydroxymethyl)-2,4-dimethylpyridin-3-ol Hydrochloride

Indometacin 2,3-Butylene Glycol Ester

Nicotinamide N-Oxide

Oxatomide N-Oxide

1,1'-[2-Hydroxypropane-1,3-diyl-bis(oxy-2,1-phenylene)]bis(3-phenylpropan-1-one)

[(3S)-3-[[(1S)-3-Cyclohexyl-1-(ethoxycarbonyl)propyl]amino]-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepin-1-yl]acetic Acid Hydrochloride

2-(1,2-Phenylene-diamino)-5-methylthiophene-3-carbonitrile

Diethazine Sulfoxide

8-Chloro-11-(piperazin-1-yl)-5H-dibenzo[b,e][1,4]diazepine

(1RS)-1,8-Diethyl-1-methyl-1,3,4,9-tetrahydropyrano[3,4-b]indole (Decarboxy Etodolac)

6-Methyl-2-(4-methylphenyl)-alpha-oxo-imidazo[1,2-a]pyridine-3-acetamide

5-Chloro-6-(piperidin-1-yl)pyrimidine-2,4-diamine

(2RS)-2-(3,4-Dimethoxyphenyl)-5-[2-[2-(3,4-dimethoxy-phenyl)ethyl](methyl)amino]- 2-propylpentane-nitrile Hydrochloride

11beta-Hydroxyandrosta-1,4-dien-3,17-dione (11beta-Hydroxyboldione)

1,5-Bis-(4-Chlorophenyl)biguanide Hydrochloride

2-Amino-5-methylpyridine

2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylic Acid (Candesartan)

8-Fluoro-5-methyl-6-oxo-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylic Acid

Codeine N-Oxide

(3S,4R)-3-[(1,3-Benzodioxol-5-yloxy)methyl]-4-phenylpiperidine Hydrochloride (Desfluoroparoxetine Hydrochloride)

4-Aminobenzenesulphonamide (Sulphanilamide)

(2RS)-2,6-Dichloro-N-(2,6-dimethylphenyl)hexanamide

N-[(7S,12aRa)-10-Hydroxy-1,2,3-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide (Colchiceine)

4-Hydroxy-2-methyl-2H-thieno-[2,3-e]1,2-thiazine-3-carboxamide 1,1-Dioxide

Pyridoxal Hydrochloride

N-(5-Chloro-1,3,4-thiadiazol-2-yl)acetamide

2,3-Dihydro-5,6-dimethoxy-2-[(4-piperidinyl)methyl]indan-1-one Hydrochloride

S-[2-(1-Methylethoxy)-2-oxoethyl]-L-cysteine Hydrochloride

3-Amino-6-chloro-1-methyl-4-phenylquinolin-2(1H)-one

Clomifene N-Oxide Hydrochloride

Methylclonazepam

6-(2,3-Dichlorophenyl)-1,2,4-triazine-3,5(2H,4H)-dione

N-[3-(3-Chloro-10,11-dihydro-5H-dibenzo[b,f]azepin-5-yl)propyl]-N,N',N'-trimethylpropane-1,3-diamine Dihydrochloride

(3R,5R)-7-[2-(4-Fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl]-5-hydroxy-3-methoxyheptanoic Acid Calcium Salt (3-O-Methylatorvastatin Calcium Salt)

(1RS)-2-[(1,1-Dimethylethyl)amino]-1-(4-hydroxyphenyl)ethanol

7-Bromo-5-(6-methylpyridin-2-yl)-1,3-dihydro-2H-1,4-benzodiazepin-2-one

6-(5-Chloropyridin-2-yl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-one

2,6-Diisopropylbenzoic Acid

Methyl 2-[6-Methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]acetate

2-(Naphthalen-2-ylmethyl)-4,5-dihydro-1H-imidazole Hydrochloride (beta-Naphazoline Hydrochloride)

Sodium 4-[N-Methyl-N-(N-methylaminocarbonyl)amino]-1-methylimidazole-5-carboxylate

Estra-4,9-diene-3,17-dione

(3R,5R)-7-[(1S,2S,6R,8S,8aR)-8-[(2,2-Dimethylbutanoyl)oxy]-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoic Acid Ammonium Salt (Tenivastatin Ammonium Salt)

4-Methyl-N-propyl-3-[[(2RS)-2-(propylamino)propanoyl]amino]thiophene-2-carboxamide Hydrochloride (Articaine Acid Propionamide Hydrochloride)

Ethyl (1RS,2SR)-2-(Methylamino)-1-phenylcyclohex-3-enecarboxylate Hydrochloride (Nortilidine Hydrochloride)

6-(2,4-Dichlorophenyl)-1,2,4-triazine-3,5-diamine

Acridine-9-carbaldehyde

19-Nor-17alpha-pregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-diol (9,11-Didehydroethinylestradiol)

1-(3,4-Dihydroxyphenyl)propan-2-one

4-Methyl-3-[[(2RS)-2-(propylamino)propanoyl]amino]thiophene-2-carboxylic Acid Hydrochloride (Articaine Acid Hydrochloride)

Norfloxacin Methyl Ester

2-Methoxy-5-sulphamoylbenzamide

[1-Hydroxy-2-(pyridin-4-yl)ethylidene]bis(phosphonic Acid) ([1-Hydroxy-2-(pyridin-4-yl)ethane-1,1-diyl]bis(phosphonic Acid))

[(6aR,9R,10aS)-10a-Methoxy-4,7-dimethyl-4,6,6a,7,8,9,10,10a-octahydroindolo[4,3-fg]quinolin-9-yl]methyl 5-Chloropyridine-3-carboxylate (Chloronicergoline)

N,N-Diethyl-2-phenylbutanamide

4-Benzylpyridine

2-(Benzo[b]thien-2-oyl)benzo[b]thiophene

1-[(2RS)-2-(2,4-Dichlorophenyl)-2-[[4-(benzenesulfonyl)benzyl]oxy]ethyl]-1H-imidazole Nitrate (Fenticonazole Sulfone Nitrate)

Erdosteine Isopropyl Ester

Polybutylene Terephthalate Cyclic Pentamer (Cyclopentakis(1,4-butylene Terephthalate))

(1RS,2RS)-2-[(Dimethylamino)methyl]-1-(3-hydroxyphenyl)cyclohexanol Hydrochloride

Doxorubicin Hydrochloride

trans-Clopenthixol Dihydrochloride

(2RS)-3-(Naphthalen-1-yloxy)propane-1,2-diol (Diol Derivative)

N-(4-Chloro-3-fluorophenyl)-7-methoxy-6-[3-(morpholin-4-yl)propoxy]quinazolin-4-amine

Liothyronine Isopropyl Ester

(2S,5R,6R)-6-[[(2S)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid (L-Amoxicillin)

O-Methylmeloxicam

(2RS)-2-(2-Chlorophenyl)-2-hydroxycyclohexanone

1-Bromo-3,5-dimethoxybenzene

6,11-Di-O-methylerythromycin A

Methylprednisolone Acetate

Ethyl 8-Hydroxy-5-methyl-6-oxo-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylate

3-[(1RS)-1-[[Ethyl(methyl)carbamoyl]amino]ethyl]phenyl N-Ethyl-N-methylcarbamate

2,4-Bis(1-methylethyl)phenol

N-Acetylbisoprolol

1-(2-Phenylethyl)piperidin-4-yl Propanoate Hydrochloride

3-Bis[(1-oxo-2-naphthylidene)amino]urea (Naftazone Impurity Blue)

Ethyl (2S)-2-[[(3S)-1-(2-Ethoxy-2-oxoethyl)-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepin-3-yl]amino]-4-phenylbutanoate (Benazepril Ethyl Ester)

17beta-Hydroxyandrosta-4,6-dien-3-one (Δ6-Testosterone)

N-[(7S,12aRa)-3-(beta-D-Glucopyranosyloxy)-1,2,10-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide (Colchicoside)

Triphenylmethanol

2,2'-(Nitrosoimino)diethanol (N-Nitrosodiethanolamine)

3-Amino-6-(2,3-dichlorophenyl)-1,2,4-triazin-5(4H)-one

N-[2-[[[2-[(Dimethylamino)methyl]thiazol-4-yl]methyl]sulfanyl]ethyl]-2-nitroacetamide Sodium Salt

6-Fluoro-3-(1-hydroxy-4-piperidyl)-1,2-benzoxazole

5-Chloroquinolin-8-ol

Buspirone N-Oxide Oxalate

2-[[[3-Methyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]methyl]sulphonyl]-1H-benzimidazole (Lansoprazole Sulphone)