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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

1-Hydroxyethyl-2-methyl-4-hydroxyimino-5-oxoimidazole chemical structure

1-Hydroxyethyl-2-methyl-4-hydroxyimino-5-oxoimidazole

CAS: 113385-77-6
Formula: C₆H₉N₃O₃
MW: 171.15 g/mol

VQ-043580

Reference Standard

1-Hydroxymidazolam β-D-glucuronide chemical structure

1-Hydroxymidazolam β-D-glucuronide

CAS: 81256-81-7
Formula: C₂₄H₂₁ClFN₃O₇
MW: 517.9 g/mol

VQ-044841

Reference Standard

1-Imidazo[1,2-a]pyridin-6-ylpropan-2-one chemical structure

1-Imidazo[1,2-a]pyridin-6-ylpropan-2-one

CAS: 116355-08-9
Formula: C₁₀H₁₀N₂O
MW: 174.2 g/mol

VQ-044783

Reference Standard

1-Isobutyl-1H-imidazo[4,5-c]quinolin-4-ol chemical structure

1-Isobutyl-1H-imidazo[4,5-c]quinolin-4-ol

CAS: 99010-99-8
Formula: C₁₄H₁₅N₃O
MW: 241.29 g/mol

VQ-031182

Reference Standard

1-Isobutyl-4-methoxy-1H-imidazo[4,5-c]quinoline chemical structure

1-Isobutyl-4-methoxy-1H-imidazo[4,5-c]quinoline

CAS: 99010-98-7
Formula: C₁₅H₁₇N₃O
MW: 255.31 g/mol

VQ-031185

Reference Standard

1-Isobutyl-N-methyl-1H-imidazo[4,5-c]quinolin-4-amine chemical structure

1-Isobutyl-N-methyl-1H-imidazo[4,5-c]quinolin-4-amine

CAS: 853793-02-9
Formula: C₁₅H₁₈N₄
MW: 254.33 g/mol

VQ-043893

Reference Standard

1-Isopropylpyrimidine-2,4,6(1H,3H,5H)-trione chemical structure

1-Isopropylpyrimidine-2,4,6(1H,3H,5H)-trione

CAS: 69998-14-7
Formula: C₇H₁₀N₂O₃
MW: 170.17 g/mol

VQ-031738

Reference Standard

1-Kestose chemical structure

CAS: 470-69-9
Formula: C₁₈H₃₂O₁₆
MW: 504.4 g/mol

VQ-039107

Reference Standard

1-Keto Descarboxy 1-Deshydroxy Fexofenadine chemical structure

1-Keto Descarboxy 1-Deshydroxy Fexofenadine

CAS: 185066-40-4
Formula: C₃₁H₃₇NO₂
MW: 455.6 g/mol

VQ-037254

Reference Standard

1-Methoxy Ertugliflozin

1-Methoxy Ertugliflozin

CAS: 2131749-22-7
Formula: C₂₃H₂₉ClO₈
MW: 468.92 g/mol

VQ-037063

Reference Standard

1-Methoxy-4-Nitrosobenzene chemical structure

1-Methoxy-4-Nitrosobenzene

CAS: 1516-21-8
Formula: C₇H₇NO₂
MW: 137.14 g/mol

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Reference Standard

1-Methy-2-phenylpiperazine chemical structure

1-Methy-2-phenylpiperazine

CAS: 5271-28-3
Formula: C₁₁H₁₆N₂
MW: 176.26 g/mol

VQ-039140

Reference Standard

1-Methyl adamantane chemical structure

1-Methyl adamantane

CAS: 768-91-2
Formula: C₁₁H₁₈
MW: 150.26 g/mol

VQ-026603

Reference Standard

1-Methyl Xanthine chemical structure

1-Methyl Xanthine

CAS: 6136-37-4
Formula: C₆H₆N₄O₂
MW: 166.14 g/mol

VQ-028323

Reference Standard

1-Methyl-1,2,4-triazole chemical structure

1-Methyl-1,2,4-triazole

CAS: 6086-21-1
Formula: C₃H₅N₃
MW: 83.09 g/mol

VQ-032411

Reference Standard

1-Methyl-1,4-dihydro-2H-pyrido[2,3-d][1,3]oxazin-2-one chemical structure

1-Methyl-1,4-dihydro-2H-pyrido[2,3-d][1,3]oxazin-2-one

CAS: 2734004-61-4
Formula: C₈H₈N₂O₂
MW: 164.16 g/mol

VQ-022867

Reference Standard

1-Methyl-1H-benzo[d]imidazole-5-carboxylic acid chemical structure

1-Methyl-1H-benzo[d]imidazole-5-carboxylic acid

CAS: 53484-17-6
Formula: C₉H₈N₂O₂
MW: 176.17 g/mol

VQ-047914

Reference Standard

1-Methyl-1H-indazole-3-carbonyl Chloride chemical structure

1-Methyl-1H-indazole-3-carbonyl Chloride

CAS: 106649-02-9
Formula: C₉H₇ClN₂O
MW: 194.62 g/mol

VQ-032644

Reference Standard

1-Methyl-2-pyrrolidineethanol chemical structure

1-Methyl-2-pyrrolidineethanol

CAS: 67004-64-2
Formula: C₇H₁₅NO
MW: 129.2 g/mol

VQ-035013

Reference Standard

1-Methyl-3-(4-methylbenzoyl)-1H-pyrrol-2-yl Propionate

1-Methyl-3-(4-methylbenzoyl)-1H-pyrrol-2-yl Propionate

CAS: 2512220-17-4
Formula: C₁₆H₁₇NO₃
MW: 271.3 g/mol

VQ-034322

Reference Standard

1-Methyl-3-isopropenylcyclopentyl-1-carboxaldehyde chemical structure

1-Methyl-3-isopropenylcyclopentyl-1-carboxaldehyde

CAS: 59514-63-5
Formula: C₁₀H₁₆O
MW: 152.23 g/mol

VQ-038041

Reference Standard

1-Methyl-4-(1-nitrosopiperidin-4-yl)piperazine chemical structure

1-Methyl-4-(1-nitrosopiperidin-4-yl)piperazine

CAS: 2089333-01-5
Formula: C₁₀H₂₀N₄O
MW: 212.29 g/mol

VQ-042995

Reference Standard

1-Methyl-4-nitro-3-propyl-1H-pyrazole-5-carboxamide chemical structure

1-Methyl-4-nitro-3-propyl-1H-pyrazole-5-carboxamide

CAS: 139756-01-7
Formula: C₈H₁₂N₄O₃
MW: 212.21 g/mol

VQ-028020

Reference Standard

1-Methyl-4-nitro-3-propyl-1H-pyrazole-5-carboxylic acid chemical structure

1-Methyl-4-nitro-3-propyl-1H-pyrazole-5-carboxylic acid

CAS: 139756-00-6
Formula: C₈H₁₁N₃O₄
MW: 213.19 g/mol

VQ-023752

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