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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

Cyproterone Acetate Impurity 7 chemical structure

Cyproterone Acetate Impurity 7

CAS: 2098-65-9
Formula: C₂₂H₂₈O₃
MW: 340.5 g/mol

VQ-047900

Reference Standard

Cystamine-d8 2HCl chemical structure

Cystamine-d8 2HCl

CAS: 2712126-51-5
Formula: C₄H₁₄Cl₂N₂S₂
MW: 233.3 g/mol

VQ-036487

Reference Standard

Cysteamine chemical structure

CAS: 60-23-1
Formula: C₂H₇NS
MW: 77.15 g/mol

VQ-025137

Reference Standard

Cysteamine bitartrate chemical structure

Cysteamine bitartrate

CAS: 27761-19-9
Formula: C₆H₁₃NO₆S
MW: 227.24 g/mol

VQ-029968

Reference Standard

Cysteamine Impurity 2 chemical structure

Cysteamine Impurity 2

CAS: 51859-63-3
Formula: C₄H₉NOS
MW: 119.19 g/mol

In stock

Reference Standard

Cysteamine-d4 Hydrochloride chemical structure

Cysteamine-d4 Hydrochloride

CAS: 1219805-04-5
Formula: C₂H₈ClNS
MW: 117.64 g/mol

VQ-041156

Reference Standard

Cysteine chemical structure

CAS: 52-90-4
Formula: C₃H₇NO₂S
MW: 121.16 g/mol

VQ-007400

Reference Standard

Cysteine Hydrochloride Monohydrate chemical structure

Cysteine Hydrochloride Monohydrate

CAS: 7048-04-6
Formula: C₃H₁₀ClNO₃S
MW: 175.64 g/mol

In stock

Reference Standard

Cytarabine chemical structure

CAS: 147-94-4
Formula: C₉H₁₃N₃O₅
MW: 243.22 g/mol

VQ-022287

Reference Standard

Cytarabine EP Impurity A chemical structure

Cytarabine EP Impurity A

CAS: 3083-77-0
Formula: C₉H₁₂N₂O₆
MW: 244.2 g/mol

VQ-023953

Reference Standard

Cytarabine EP Impurity F chemical structure

Cytarabine EP Impurity F

CAS: 32830-01-6
Formula: C₉H₁₁N₃O₄
MW: 225.2 g/mol

VQ-022288

Reference Standard

Cytarabine EP Impurity G chemical structure

Cytarabine EP Impurity G

CAS: 2140-61-6
Formula: C₁₀H₁₅N₃O₅
MW: 257.24 g/mol

VQ-022289

Reference Standard

Cytarabine EP Impurity H chemical structure

Cytarabine EP Impurity H

CAS: 31698-14-3
Formula: C₉H₁₁N₃O₄
MW: 225.2 g/mol

VQ-029970

Reference Standard

Cytarabine EP Impurity I chemical structure

Cytarabine EP Impurity I

CAS: 6829-31-8
Formula: C₁₀H₁₅N₃O₅
MW: 257.24 g/mol

VQ-022290

Reference Standard

Cytidine 2'-monophosphate chemical structure

Cytidine 2'-monophosphate

CAS: 81487-28-7
Formula: C₉H₁₂N₃Na₂O₈P
MW: 367.16 g/mol

VQ-047903

Reference Standard

Cytidine 5'-pyrophosphate 2-(Dimethylamino)ethyl Ester Sodium Salt chemical structure

Cytidine 5'-pyrophosphate 2-(Dimethylamino)ethyl Ester Sodium Salt

CAS: 119629-11-7
Formula: C₁₃H₂₂N₄Na₂O₁₁P₂
MW: 518.26 g/mol

VQ-044645

Reference Standard

Cytidine D2 chemical structure

CAS: 40632-25-5
Formula: C₉H₁₃N₃O₅
MW: 245.23 g/mol

VQ-047905

Reference Standard

Cytidine Diphosphate Ethanolamine chemical structure

Cytidine Diphosphate Ethanolamine

CAS: 3036-18-8
Formula: C₁₁H₂₀N₄O₁₁P₂
MW: 446.24 g/mol

VQ-029971

Reference Standard

Cytidine-2',3'-cyclic Monophosphate Sodium Salt chemical structure

Cytidine-2',3'-cyclic Monophosphate Sodium Salt

CAS: 15718-51-1
Formula: C₉H₁₁N₃NaO₇P
MW: 327.16 g/mol

VQ-047904

Reference Standard

Cytidine, 5'-deoxy-5-fluoro-N,N-bis[(pentyloxy)carbonyl]-, 2',3'-diacetate chemical structure

Cytidine, 5'-deoxy-5-fluoro-N,N-bis[(pentyloxy)carbonyl]-, 2',3'-diacetate

CAS: 1313238-38-8
Formula: C₂₅H₃₆FN₃O₁₀
MW: 557.6 g/mol

VQ-024753

Reference Standard

D -Glucoheptono-1,4-lactone chemical structure

D -Glucoheptono-1,4-lactone

CAS: 89-67-8
Formula: C₇H₁₂O₇
MW: 208.17 g/mol

VQ-036110

Reference Standard

D 517 Hydrochloride chemical structure

D 517 Hydrochloride

CAS: 1794-55-4
Formula: C₂₆H₃₇ClN₂O₄
MW: 477 g/mol

VQ-034586

Reference Standard

D-(+)-Carvone chemical structure

CAS: 2244-16-8
Formula: C₁₀H₁₄O
MW: 150.22 g/mol

VQ-027121

Reference Standard

D-(+)-Darunavir chemical structure

D-(+)-Darunavir

CAS: 1399859-60-9
Formula: C₂₇H₃₇N₃O₇S
MW: 547.7 g/mol

VQ-022314

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