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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

Disodium Pamidrote chemical structure

Disodium Pamidrote

CAS: 109552-15-0
Formula: C₃H₁₉NNa₂O₁₂P₂
MW: 369.11 g/mol

VQ-027378

Reference Standard

Disodium-3-Hydroxy-2,7-naphthalenedisulfonate chemical structure

Disodium-3-Hydroxy-2,7-naphthalenedisulfonate

CAS: 135-51-3
Formula: C₁₀H₆Na₂O₇S₂
MW: 348.3 g/mol

VQ-050623

Reference Standard

Disopyramide chemical structure

CAS: 3737-09-5
Formula: C₂₁H₂₉N₃O
MW: 339.5 g/mol

VQ-036746

Reference Standard

Disopyramide EP Impurity A chemical structure

Disopyramide EP Impurity A

CAS: 5005-46-9
Formula: C₂₁H₂₇N₃
MW: 321.5 g/mol

VQ-030236

Reference Standard

Disopyramide EP Impurity B chemical structure

Disopyramide EP Impurity B

CAS: 53761-14-1
Formula: C₂₀H₂₈N₂
MW: 296.4 g/mol

VQ-030237

Reference Standard

Disopyramide EP Impurity C chemical structure

Disopyramide EP Impurity C

CAS: 38236-46-3
Formula: C₁₈H₂₃N₃O
MW: 297.4 g/mol

VQ-043141

Reference Standard

Disopyramide EP Impurity D chemical structure

Disopyramide EP Impurity D

CAS: 5005-36-7
Formula: C₁₃H₁₀N₂
MW: 194.23 g/mol

VQ-027226

Reference Standard

Disopyramide Phosphate chemical structure

Disopyramide Phosphate

CAS: 22059-60-5
Formula: C₂₁H₃₂N₃O₅P
MW: 437.5 g/mol

VQ-030235

Reference Standard

Disopyramide-D14 Tosylate chemical structure

Disopyramide-D14 Tosylate

CAS: 1216989-88-6
Formula: C₂₈H₃₇N₃O₄S
MW: 525.8 g/mol

VQ-048039

Reference Standard

Distearyl Fumarate chemical structure

Distearyl Fumarate

CAS: 7283-68-3
Formula: C₄₀H₇₆O₄
MW: 621 g/mol

VQ-042215

Reference Standard

Disulfamide chemical structure

CAS: 671-88-5
Formula: C₇H₉ClN₂O₄S₂
MW: 284.7 g/mol

VQ-038367

Reference Standard

Disulfiram EP Impurity B (Freebase) chemical structure

Disulfiram EP Impurity B (Freebase)

CAS: 147-84-2
Formula: C₅H₁₁NS₂
MW: 149.3 g/mol

VQ-006338

Reference Standard

Disulfiram EP Impurity B (Sodium Salt) chemical structure

Disulfiram EP Impurity B (Sodium Salt)

CAS: 20624-25-3
Formula: C₅H₁₆NNaO₃S₂
MW: 225.3 g/mol

In stock

Reference Standard

Disulfiram-d20 chemical structure

CAS: 1216403-88-1
Formula: C₁₀H₂₀N₂S₄
MW: 316.7 g/mol

VQ-036747

Reference Standard

Dithranol chemical structure

CAS: 1143-38-0
Formula: C₁₄H₁₀O₃
MW: 226.23 g/mol

VQ-034825

Reference Standard

Dithranol EP Impurity B chemical structure

Dithranol EP Impurity B

CAS: 117-10-2
Formula: C₁₄H₈O₄
MW: 240.21 g/mol

VQ-030018

Reference Standard

Dithranol EP Impurity C chemical structure

Dithranol EP Impurity C

CAS: 31991-54-5
Formula: C₂₈H₁₈O₆
MW: 450.4 g/mol

VQ-025351

Reference Standard

Dithranol EP Impurity D chemical structure

Dithranol EP Impurity D

CAS: 1715-81-7
Formula: C₁₄H₁₀O₂
MW: 210.23 g/mol

VQ-030239

Reference Standard

Dityrosine chemical structure

CAS: 63442-81-9
Formula: C₁₈H₂₀N₂O₆
MW: 360.4 g/mol

VQ-036750

Reference Standard

Dityrosine (Mixture of Diastereomers) chemical structure

Dityrosine (Mixture of Diastereomers)

CAS: 980-21-2
Formula: C₁₈H₂₀N₂O₆
MW: 360.4 g/mol

VQ-048041

Reference Standard

Diuron chemical structure

CAS: 330-54-1
Formula: C₉H₁₀Cl₂N₂O
MW: 233.09 g/mol

VQ-030240

Reference Standard

Diuron-d6 chemical structure

CAS: 1007536-67-5
Formula: C₉H₁₀Cl₂N₂O
MW: 239.13 g/mol

VQ-030241

Reference Standard

Divalproex sodium chemical structure

Divalproex sodium

CAS: 76584-70-8
Formula: C₁₆H₃₁NaO₄
MW: 310.4 g/mol

VQ-036751

Reference Standard

DL-2-Hydroxybutyric acid chemical structure

DL-2-Hydroxybutyric acid

CAS: 600-15-7
Formula: C₄H₈O₃
MW: 104.1 g/mol

VQ-049488

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