Skip to content

Product division

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

2,5-Dichlorophenol chemical structure

2,5-Dichlorophenol

CAS: 583-78-8
Formula: C₆H₄Cl₂O
MW: 163 g/mol

VQ-040293

Reference Standard

2,5-Dichloroquinoline chemical structure

2,5-Dichloroquinoline

CAS: 59412-12-3
Formula: C₉H₅Cl₂N
MW: 198.05 g/mol

VQ-044580

Reference Standard

2,5-Dichlorothiophen-3-yl Tioconazole Hydrochloride chemical structure

2,5-Dichlorothiophen-3-yl Tioconazole Hydrochloride

CAS: 61675-62-5
Formula: C₁₆H₁₃Cl₅N₂OS
MW: 458.6 g/mol

VQ-034284

Reference Standard

2,5-Difluorophenylacetic acid chemical structure

2,5-Difluorophenylacetic acid

CAS: 85068-27-5
Formula: C₈H₆F₂O₂
MW: 172.13 g/mol

VQ-027138

Reference Standard

2,5-Dimethoxy-4-(1-methylethyl)benzenemethanol chemical structure

2,5-Dimethoxy-4-(1-methylethyl)benzenemethanol

CAS: 62458-52-0
Formula: C₁₂H₁₈O₃
MW: 210.27 g/mol

VQ-044173

Reference Standard

2,5-Dimethoxyphenylacetonitrile chemical structure

2,5-Dimethoxyphenylacetonitrile

CAS: 18086-24-3
Formula: C₁₀H₁₁NO₂
MW: 177.2 g/mol

VQ-034172

Reference Standard

2,5-Dimethyl Celecoxib chemical structure

2,5-Dimethyl Celecoxib

CAS: 457639-26-8
Formula: C₁₈H₁₆F₃N₃O₂S
MW: 395.4 g/mol

VQ-034810

Reference Standard

2,5-Dimethyl Ranolazine Impurity

2,5-Dimethyl Ranolazine Impurity

CAS: 780711-81-1
Formula: C₂₄H₃₃N₃O₄
MW: 427.5 g/mol

VQ-033458

Reference Standard

2,5-Dimethylthiophenol chemical structure

2,5-Dimethylthiophenol

CAS: 4001-61-0
Formula: C₈H₁₀S
MW: 138.23 g/mol

VQ-032888

Reference Standard

2,5-Dioxopyrrolidin-1-yl ((3S,3aR,6aS)-hexahydrofuro[2,3-b]furan-3-yl) carbonate chemical structure

2,5-Dioxopyrrolidin-1-yl ((3S,3aR,6aS)-hexahydrofuro[2,3-b]furan-3-yl) carbonate

CAS: 253265-98-4
Formula: C₁₁H₁₃NO₇
MW: 271.22 g/mol

VQ-030069

Reference Standard

2,5-Dioxopyrrolidin-1-yl 4-((3-((3-(((2S)-1-(((14S,16S,33S,2R,4R,10E,12Z,14R)-86-chloro-14-hydroxy-85,14-dimethoxy-33,2,7,10-tetramethyl-12,6-dioxo-7-aza-1(6,4)-oxazinana-3(2,3)-oxirana-8(1,3)-benzenacyclotetradecaphane-10,12-dien-4-yl)oxy)-1-oxopropan-2-yl)(methyl)amino)-3-oxopropyl)thio) chemical structure

2,5-Dioxopyrrolidin-1-yl 4-((3-((3-(((2S)-1-(((14S,16S,33S,2R,4R,10E,12Z,14R)-86-chloro-14-hydroxy-85,14-dimethoxy-33,2,7,10-tetramethyl-12,6-dioxo-7-aza-1(6,4)-oxazinana-3(2,3)-oxirana-8(1,3)-benzenacyclotetradecaphane-10,12-dien-4-yl)oxy)-1-oxopropan-2-yl)(methyl)amino)-3-oxopropyl)thio)

CAS: 1228105-51-8
Formula: C₅₁H₆₆ClN₅O₁₆S
MW: 1072.6 g/mol

VQ-049048

Reference Standard

2,5-Pyrazinedipropanoic Acid chemical structure

2,5-Pyrazinedipropanoic Acid

CAS: 77479-02-8
Formula: C₁₀H₁₂N₂O₄
MW: 224.21 g/mol

VQ-024242

Reference Standard

2,5,8,11,14,17,20,23,26-Nonaoxaoctacosan-28-yl 4-aminobenzoate chemical structure

2,5,8,11,14,17,20,23,26-Nonaoxaoctacosan-28-yl 4-aminobenzoate

CAS: 103042-95-1
Formula: C₂₆H₄₅NO₁₁
MW: 547.6 g/mol

VQ-045147

Reference Standard

2,6-Di-tert-butyl-4-hydroxy-4-methyl-2,5-cyclohexadien-1-one chemical structure

2,6-Di-tert-butyl-4-hydroxy-4-methyl-2,5-cyclohexadien-1-one

CAS: 10396-80-2
Formula: C₁₅H₂₄O₂
MW: 236.35 g/mol

VQ-042897

Reference Standard

2,6-Diamino-5-chloro-4-(piperidin-1-yl)pyrimidine 1-oxide

2,6-Diamino-5-chloro-4-(piperidin-1-yl)pyrimidine 1-oxide

CAS: 2889432-05-5
Formula: C₉H₁₄ClN₅O
MW: 243.7 g/mol

VQ-031931

Reference Standard

2,6-Diaminopyrimidin-4-yl 4-methylbenzenesulfonate

2,6-Diaminopyrimidin-4-yl 4-methylbenzenesulfonate

CAS: 75105-15-6
Formula: C₁₁H₁₂N₄O₃S
MW: 280.3 g/mol

VQ-049125

Reference Standard

2,6-Dibromo-4-(trifluoromethoxy)aniline chemical structure

2,6-Dibromo-4-(trifluoromethoxy)aniline

CAS: 88149-49-9
Formula: C₇H₄Br₂F₃NO
MW: 334.92 g/mol

VQ-027125

Reference Standard

2,6-Dichloro Benzyl Alcohol chemical structure

2,6-Dichloro Benzyl Alcohol

CAS: 15258-73-8
Formula: C₇H₆Cl₂O
MW: 177.02 g/mol

VQ-023403

Reference Standard

2,6-Dichloro-3,5-dimethoxybenzoic Acid chemical structure

2,6-Dichloro-3,5-dimethoxybenzoic Acid

CAS: 75177-59-2
Formula: C₉H₈Cl₂O₄
MW: 251.06 g/mol

VQ-048686

Reference Standard

2,6-Dichloro-4-((1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-5-yl)oxy)benzonitrile chemical structure

2,6-Dichloro-4-((1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-5-yl)oxy)benzonitrile

CAS: 2354382-27-5
Formula: C₁₄H₈BCl₂NO₃
MW: 319.9 g/mol

VQ-044063

Reference Standard

2,6-Dichloro-4-(Methylsulfonyl)Benzoic Acid chemical structure

2,6-Dichloro-4-(Methylsulfonyl)Benzoic Acid

CAS: 1121585-09-8
Formula: C₈H₆Cl₂O₄S
MW: 269.1 g/mol

VQ-034655

Reference Standard

2,6-Dichloro-4-methyl-11H-pyrido[2,1-b]quinazolin-11-one chemical structure

2,6-Dichloro-4-methyl-11H-pyrido[2,1-b]quinazolin-11-one

CAS: 1328893-14-6
Formula: C₁₃H₈Cl₂N₂O
MW: 279.12 g/mol

VQ-027224

Reference Standard

2,6-Dichloro-9-nitroso-9H-purine chemical structure

2,6-Dichloro-9-nitroso-9H-purine

CAS: 2514773-56-7
Formula: C₅HCl₂N₅O
MW: 218 g/mol

VQ-028979

Reference Standard

2,6-Dichloro-N-hydroxy-3,5-dimethoxybenzamide chemical structure

2,6-Dichloro-N-hydroxy-3,5-dimethoxybenzamide

CAS: 2607108-25-6
Formula: C₉H₉Cl₂NO₄
MW: 266.07 g/mol

VQ-048687

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales