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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

N,N'-Dimethylsulfonyl Dofetilide chemical structure

N,N'-Dimethylsulfonyl Dofetilide

CAS: 937194-91-7
Formula: C₂₁H₃₁N₃O₉S₄
MW: 597.8 g/mol

VQ-030255

Reference Standard

N,N′-[5-(2-Methoxyphenoxy)[2,2′-bipyrimidine]-4,6-diyl]bis[4(1,1dimethylethyl)benzenesulfonamide] chemical structure

N,N′-[5-(2-Methoxyphenoxy)[2,2′-bipyrimidine]-4,6-diyl]bis[4(1,1dimethylethyl)benzenesulfonamide]

CAS: 1218951-81-5
Formula: C₃₅H₃₈N₆O₆S₂
MW: 702.8 g/mol

VQ-021866

Reference Standard

N,O-Desethylene Linezolid chemical structure

N,O-Desethylene Linezolid

CAS: 1219708-30-1
Formula: C₁₄H₁₈FN₃O₄
MW: 311.31 g/mol

VQ-031583

Reference Standard

N,O-Diacetyl Serotonin chemical structure

N,O-Diacetyl Serotonin

CAS: 28026-16-6
Formula: C₁₄H₁₆N₂O₃
MW: 260.29 g/mol

VQ-023050

Reference Standard

N,O-Dibenzoyl-DL-tyrosyl-N`,N`-dipropylamide chemical structure

N,O-Dibenzoyl-DL-tyrosyl-N`,N`-dipropylamide

CAS: 57227-08-4
Formula: C₂₉H₃₂N₂O₄
MW: 472.6 g/mol

VQ-042571

Reference Standard

N,O-Dimethyl-Naltrexone Bromide chemical structure

N,O-Dimethyl-Naltrexone Bromide

CAS: 1005410-37-6
Formula: C₂₂H₂₈BrNO₄
MW: 450.4 g/mol

VQ-038549

Reference Standard

N,O-Fluorophenylbutyryl Haloperidol chemical structure

N,O-Fluorophenylbutyryl Haloperidol

CAS: 2733027-86-4
Formula: C₃₁H₃₂ClF₂NO₃
MW: 540 g/mol

VQ-026042

Reference Standard

N'-((2R,3R)-2-(Benzyloxy)pentan-3-yl)formohydrazide chemical structure

N'-((2R,3R)-2-(Benzyloxy)pentan-3-yl)formohydrazide

CAS: 2173414-68-9
Formula: C₁₃H₂₀N₂O₂
MW: 236.31 g/mol

VQ-033259

Reference Standard

N'-(2-Amino-4,6-dichloro-5-pyrimidinyl)-N,N-dimethylmethanimidamide chemical structure

N'-(2-Amino-4,6-dichloro-5-pyrimidinyl)-N,N-dimethylmethanimidamide

CAS: 171887-02-8
Formula: C₇H₉Cl₂N₅
MW: 234.08 g/mol

VQ-028976

Reference Standard

N'-(7-Chloro-5-phenyl-3H-benzo[e][1,4]diazepin-2-yl)acetohydrazide chemical structure

N'-(7-Chloro-5-phenyl-3H-benzo[e][1,4]diazepin-2-yl)acetohydrazide

CAS: 28910-89-6
Formula: C₁₇H₁₅ClN₄O
MW: 326.8 g/mol

VQ-035664

Reference Standard

N'-Desaminomethylsulfonyl-N'-nitryl Dofetilide chemical structure

N'-Desaminomethylsulfonyl-N'-nitryl Dofetilide

CAS: 115256-44-5
Formula: C₁₈H₂₃N₃O₅S
MW: 393.5 g/mol

VQ-048058

Reference Standard

N'-Desmethylsulfonyl Dofetilide chemical structure

N'-Desmethylsulfonyl Dofetilide

CAS: 115256-12-7
Formula: C₁₈H₂₅N₃O₃S
MW: 363.5 g/mol

VQ-030253

Reference Standard

N'-Desmethylsulfonyl-N-methylsulfonyl Dofetilide chemical structure

N'-Desmethylsulfonyl-N-methylsulfonyl Dofetilide

CAS: 937195-06-7
Formula: C₁₉H₂₇N₃O₅S₂
MW: 441.6 g/mol

VQ-043142

Reference Standard

N'-Methyl-N,N-diphenylurea chemical structure

N'-Methyl-N,N-diphenylurea

CAS: 13114-72-2
Formula: C₁₄H₁₄N₂O
MW: 226.27 g/mol

VQ-028237

Reference Standard

N'-Methyleneisonicotinohydrazide chemical structure

N'-Methyleneisonicotinohydrazide

CAS: 4813-02-9
Formula: C₇H₇N₃O
MW: 149.15 g/mol

VQ-037749

Reference Standard

N'-Methylsulfonyl Dofetilide chemical structure

N'-Methylsulfonyl Dofetilide

CAS: 312315-47-2
Formula: C₂₀H₂₉N₃O₇S₃
MW: 519.7 g/mol

VQ-025358

Reference Standard

N',2-Di(propan-2-ylidene)hydrazine-1-carbohydrazide chemical structure

N',2-Di(propan-2-ylidene)hydrazine-1-carbohydrazide

CAS: 19411-36-0
Formula: C₇H₁₄N₄O
MW: 170.21 g/mol

VQ-038674

Reference Standard

N',O'-(4-Methoxybenzylidene)cabazitaxel chemical structure

N',O'-(4-Methoxybenzylidene)cabazitaxel

CAS: 183133-95-1
Formula: C₅₃H₆₃NO₁₅
MW: 954.1 g/mol

VQ-021944

Reference Standard

N′-(2-Chloroethyl)-N,N-dicyclohexylurea

N′-(2-Chloroethyl)-N,N-dicyclohexylurea

CAS: 1222864-16-5
Formula: C₁₅H₂₇ClN₂O
MW: 286.8 g/mol

VQ-038108

Reference Standard

N1-((1S, 2R,4S)-2-Amino-4-(dimethylcarbamoyl)cyclohexyl)- N2-(5-chloro pyridin-2-yl)oxalamide chemical structure

N1-((1S, 2R,4S)-2-Amino-4-(dimethylcarbamoyl)cyclohexyl)- N2-(5-chloro pyridin-2-yl)oxalamide

CAS: 480452-37-7
Formula: C₁₆H₂₂ClN₅O₃
MW: 367.8 g/mol

VQ-030375

Reference Standard

N1-((8-oxo-8-(Phenylamino)octanoyl)oxy)-N8-phenyloctanediamide

N1-((8-oxo-8-(Phenylamino)octanoyl)oxy)-N8-phenyloctanediamide

CAS: 866824-87-5
Formula: C₂₈H₃₇N₃O₅
MW: 495.62 g/mol

VQ-044631

Reference Standard

N1-(1,3-Dihydroxypropan-2-yl)-N3-(2,3-dihydroxypropyl)-5-(2-hydroxy-N-methylacetamido)-2,4,6-triiodoisophthalamide chemical structure

N1-(1,3-Dihydroxypropan-2-yl)-N3-(2,3-dihydroxypropyl)-5-(2-hydroxy-N-methylacetamido)-2,4,6-triiodoisophthalamide

CAS: 2068038-50-4
Formula: C₁₇H₂₂I₃N₃O₈
MW: 777.1 g/mol

VQ-037716

Reference Standard

N1-(1,3-Dihydroxypropan-2-yl)-N3-(2,3-dihydroxypropyl)-5-(N-(2,3-dihydroxypropyl)acetamido)-2,4,6-triiodoisophthalamide chemical structure

N1-(1,3-Dihydroxypropan-2-yl)-N3-(2,3-dihydroxypropyl)-5-(N-(2,3-dihydroxypropyl)acetamido)-2,4,6-triiodoisophthalamide

CAS: 1404062-34-5
Formula: C₁₉H₂₆I₃N₃O₉
MW: 821.1 g/mol

VQ-037714

Reference Standard

N1-(2-(Piperazin-1-yl)ethyl)ethane-1,2-diamine Tetrahydrochloride

N1-(2-(Piperazin-1-yl)ethyl)ethane-1,2-diamine Tetrahydrochloride

CAS: 881850-92-6
Formula: C₈H₂₄Cl₄N₄
MW: 318.11 g/mol

VQ-035473

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