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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

4-Hydroxyphthalic acid chemical structure

4-Hydroxyphthalic acid

CAS: 610-35-5
Formula: C₈H₆O₅
MW: 182.13 g/mol

VQ-038973

Reference Standard

4-Hydroxypiperidine-d9 chemical structure

4-Hydroxypiperidine-d9

CAS: 1219799-39-9
Formula: C₅H₁₁NO
MW: 110.2 g/mol

VQ-041236

Reference Standard

4-Hydroxyquinoline chemical structure

4-Hydroxyquinoline

CAS: 611-36-9
Formula: C₉H₇NO
MW: 145.16 g/mol

VQ-049650

Reference Standard

4-Hydroxyquinoline-3-carboxylic acid chemical structure

4-Hydroxyquinoline-3-carboxylic acid

CAS: 34785-11-0
Formula: C₁₀H₇NO₃
MW: 189.17 g/mol

VQ-048731

Reference Standard

4-Hydroxysolifenacin chemical structure

4-Hydroxysolifenacin

CAS: 861998-77-8
Formula: C₂₃H₂₆N₂O₃
MW: 378.5 g/mol

VQ-033915

Reference Standard

4-Hydroxytestosterone chemical structure

4-Hydroxytestosterone

CAS: 2141-17-5
Formula: C₁₉H₂₈O₃
MW: 304.4 g/mol

VQ-042453

Reference Standard

4-Hydroxytriazolam chemical structure

4-Hydroxytriazolam

CAS: 65686-11-5
Formula: C₁₇H₁₂Cl₂N₄O
MW: 359.2 g/mol

VQ-042670

Reference Standard

4-Iodo-2,6-dimethylaniline chemical structure

4-Iodo-2,6-dimethylaniline

CAS: 4102-53-8
Formula: C₈H₁₀IN
MW: 247.08 g/mol

VQ-035307

Reference Standard

4-Iodo-D-phenylalanine chemical structure

4-Iodo-D-phenylalanine

CAS: 62561-75-5
Formula: C₉H₁₀INO₂
MW: 291.09 g/mol

VQ-027291

Reference Standard

4-Isobutoxybenzylamine Acetate chemical structure

4-Isobutoxybenzylamine Acetate

CAS: 955997-89-4
Formula: C₁₃H₂₁NO₃
MW: 239.31 g/mol

VQ-023491

Reference Standard

4-Isobutylamino-3-aminoquinoline chemical structure

4-Isobutylamino-3-aminoquinoline

CAS: 99010-09-0
Formula: C₁₃H₁₇N₃
MW: 215.29 g/mol

VQ-034985

Reference Standard

4-Isobutylbenzoic acid chemical structure

4-Isobutylbenzoic acid

CAS: 38861-88-0
Formula: C₁₁H₁₄O₂
MW: 178.23 g/mol

VQ-026113

Reference Standard

4-Isobutylpiperidine-2,6-dione chemical structure

4-Isobutylpiperidine-2,6-dione

CAS: 916982-10-0
Formula: C₉H₁₅NO₂
MW: 169.22 g/mol

VQ-033309

Reference Standard

4-Isocyanato-2-trifluoromethylbenzonitrile chemical structure

4-Isocyanato-2-trifluoromethylbenzonitrile

CAS: 143782-18-7
Formula: C₉H₃F₃N₂O
MW: 212.13 g/mol

VQ-030498

Reference Standard

4-Isopropoxy-3-isopropylbenzoic acid chemical structure

4-Isopropoxy-3-isopropylbenzoic acid

CAS: 161070-01-5
Formula: C₁₃H₁₈O₃
MW: 222.28 g/mol

VQ-041735

Reference Standard

4-Isothiocyanato-2-(trifluoromethyl)benzoic acid chemical structure

4-Isothiocyanato-2-(trifluoromethyl)benzoic acid

CAS: 1705583-65-8
Formula: C₉H₄F₃NO₂S
MW: 247.2 g/mol

VQ-030501

Reference Standard

4-Methoxy Lornoxicam chemical structure

4-Methoxy Lornoxicam

CAS: 2469039-23-2
Formula: C₁₄H₁₂ClN₃O₄S₂
MW: 385.8 g/mol

VQ-026509

Reference Standard

4-Methoxy Meloxicam chemical structure

4-Methoxy Meloxicam

CAS: 1391051-96-9
Formula: C₁₅H₁₅N₃O₄S₂
MW: 365.4 g/mol

VQ-023057

Reference Standard

4-Methoxy phenethyl amine Hydrochloride chemical structure

4-Methoxy phenethyl amine Hydrochloride

CAS: 645-58-9
Formula: C₉H₁₄ClNO
MW: 187.66 g/mol

VQ-032614

Reference Standard

4-Methoxy Propranolol-d7 chemical structure

4-Methoxy Propranolol-d7

CAS: 1189868-02-7
Formula: C₁₇H₂₃NO₃
MW: 296.41 g/mol

VQ-043425

Reference Standard

4-Methoxy-10H-phenothiazine chemical structure

4-Methoxy-10H-phenothiazine

CAS: 61174-11-6
Formula: C₁₃H₁₁NOS
MW: 229.3 g/mol

VQ-041681

Reference Standard

4-Methoxy-3-methylphenylacetone chemical structure

4-Methoxy-3-methylphenylacetone

CAS: 16882-23-8
Formula: C₁₁H₁₄O₂
MW: 178.23 g/mol

VQ-031750

Reference Standard

4-Methoxy-3,5-dimethyl-2-pyridinemethanol chemical structure

4-Methoxy-3,5-dimethyl-2-pyridinemethanol

CAS: 86604-78-6
Formula: C₉H₁₃NO₂
MW: 167.2 g/mol

VQ-032735

Reference Standard

4-Methoxy-3,5-dimethylpyridine 1-Oxide chemical structure

4-Methoxy-3,5-dimethylpyridine 1-Oxide

CAS: 91219-89-5
Formula: C₈H₁₁NO₂
MW: 153.18 g/mol

VQ-037083

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