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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

Warfarin Sodium Clathrate chemical structure

Warfarin Sodium Clathrate

CAS: 67430-45-9
Formula: C₁₉H₁₅NaO₄
MW: 330.3 g/mol

VQ-042958

Reference Standard

Warfarin-d5 chemical structure

CAS: 75472-93-4
Formula: C₁₉H₁₆O₄
MW: 313.4 g/mol

VQ-034708

Reference Standard

Withaferin A chemical structure

CAS: 5119-48-2
Formula: C₂₈H₃₈O₆
MW: 470.6 g/mol

VQ-042966

Reference Standard

Withanolide A chemical structure

CAS: 32911-62-9
Formula: C₂₈H₃₈O₆
MW: 470.6 g/mol

VQ-042967

Reference Standard

Withanolide B chemical structure

CAS: 56973-41-2
Formula: C₂₈H₃₈O₅
MW: 454.6 g/mol

VQ-042969

Reference Standard

Withanone chemical structure

CAS: 27570-38-3
Formula: C₂₈H₃₈O₆
MW: 470.6 g/mol

VQ-040759

Reference Standard

Withanoside IV chemical structure

CAS: 362472-81-9
Formula: C₄₀H₆₂O₁₅
MW: 782.9 g/mol

VQ-042968

Reference Standard

Withanoside V chemical structure

CAS: 256520-90-8
Formula: C₄₀H₆₂O₁₄
MW: 766.9 g/mol

VQ-042970

Reference Standard

Xanomeline chemical structure

CAS: 131986-45-3
Formula: C₁₄H₂₃N₃OS
MW: 281.42 g/mol

VQ-042973

Reference Standard

Xanomeline metabolite A chemical structure

Xanomeline metabolite A

CAS: 174656-57-6
Formula: C₁₁H₁₅N₃O₃S
MW: 269.32 g/mol

VQ-042979

Reference Standard

Xanomeline metabolite B chemical structure

Xanomeline metabolite B

CAS: 159058-46-5
Formula: C₁₂H₁₇N₃O₃S
MW: 283.35 g/mol

VQ-042978

Reference Standard

Xanomeline N-Methyl Pyridimium Impurity chemical structure

Xanomeline N-Methyl Pyridimium Impurity

CAS: 2414049-88-8
Formula: C₁₄H₂₀N₃O₂S⁺
MW: 294.39 g/mol

VQ-042974

Reference Standard

Xanomeline N-oxide chemical structure

Xanomeline N-oxide

CAS: 174656-58-7
Formula: C₁₄H₂₃N₃O₂S
MW: 297.42 g/mol

VQ-034710

Reference Standard

Xanomeline tartrate chemical structure

Xanomeline tartrate

CAS: 152854-19-8
Formula: C₁₈H₂₉N₃O₇S
MW: 431.5 g/mol

VQ-042975

Reference Standard

Xanomeline-d3 chemical structure

CAS: 175615-28-8
Formula: C₁₄H₂₃N₃OS
MW: 284.44 g/mol

VQ-042980

Reference Standard

Xanthanoic acid chemical structure

Xanthanoic acid

CAS: 82-07-5
Formula: C₁₄H₁₀O₃
MW: 226.23 g/mol

VQ-041717

Reference Standard

Xanthinol Nicotinate chemical structure

Xanthinol Nicotinate

CAS: 437-74-1
Formula: C₁₉H₂₆N₆O₆
MW: 434.4 g/mol

VQ-034712

Reference Standard

Xanthone chemical structure

CAS: 90-47-1
Formula: C₁₃H₈O₂
MW: 196.2 g/mol

VQ-033359

Reference Standard

Xanthorrhizol chemical structure

CAS: 30199-26-9
Formula: C₁₅H₂₂O
MW: 218.33 g/mol

VQ-040599

Reference Standard

Xanthotoxin Impurity A chemical structure

Xanthotoxin Impurity A

CAS: 68123-30-8
Formula: C₁₁H₈O₄
MW: 204.18 g/mol

VQ-042981

Reference Standard

Xipamide chemical structure

CAS: 14293-44-8
Formula: C₁₅H₁₅ClN₂O₄S
MW: 354.8 g/mol

VQ-043349

Reference Standard

Xylan Sulfate chemical structure

CAS: 37300-21-3
Formula: C₁₀H₁₈O₂₁S₄
MW: 602.5 g/mol

VQ-041398

Reference Standard

Xylazine chemical structure

CAS: 7361-61-7
Formula: C₁₂H₁₆N₂S
MW: 220.34 g/mol

VQ-042983

Reference Standard

Xylazine EP Impurity B chemical structure

Xylazine EP Impurity B

CAS: 25480-78-8
Formula: C₁₇H₂₀N₂S
MW: 284.4 g/mol

VQ-042985

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