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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

Nitrazepam EP Impurity C chemical structure

Nitrazepam EP Impurity C

CAS: 2011-70-3
Formula: C₁₅H₁₁BrN₂O₄
MW: 363.16 g/mol

VQ-044852

Reference Standard

Nitrazepam EP Impurity D chemical structure

Nitrazepam EP Impurity D

CAS: 33311-76-1
Formula: C₂₃H₁₅N₃O₆
MW: 429.4 g/mol

VQ-044853

Reference Standard

Nitrendipine chemical structure

CAS: 39562-70-4
Formula: C₁₈H₂₀N₂O₆
MW: 360.4 g/mol

VQ-023271

Reference Standard

Nitrendipine Dipropyl Ester chemical structure

Nitrendipine Dipropyl Ester

CAS: 77888-05-2
Formula: C₂₁H₂₆N₂O₆
MW: 402.4 g/mol

VQ-026405

Reference Standard

Nitrendipine EP Impurity A chemical structure

Nitrendipine EP Impurity A

CAS: 89267-41-4
Formula: C₁₈H₁₈N₂O₆
MW: 358.3 g/mol

VQ-023272

Reference Standard

Nitrendipine EP Impurity C chemical structure

Nitrendipine EP Impurity C

CAS: 21829-28-7
Formula: C₁₉H₂₂N₂O₆
MW: 374.4 g/mol

VQ-023273

Reference Standard

Nitrendipine Propyl Ester chemical structure

Nitrendipine Propyl Ester

CAS: 225785-54-6
Formula: C₁₉H₂₂N₂O₆
MW: 374.4 g/mol

VQ-026931

Reference Standard

Nitrilotriacetamide chemical structure

Nitrilotriacetamide

CAS: 4862-18-4
Formula: C₆H₁₂N₄O₃
MW: 188.18 g/mol

VQ-047365

Reference Standard

Nitrobenzene-d5 chemical structure

Nitrobenzene-d5

CAS: 4165-60-0
Formula: C₆H₅NO₂
MW: 128.14 g/mol

VQ-041159

Reference Standard

Nitrofurantoin chemical structure

CAS: 67-20-9
Formula: C₈H₆N₄O₅
MW: 238.16 g/mol

VQ-026933

Reference Standard

Nitrofurantoin Impurity 9 chemical structure

Nitrofurantoin Impurity 9

CAS: 99409-14-0
Formula: C₆H₁₁N₃O
MW: 141.17 g/mol

VQ-049265

Reference Standard

Nitrofurantoin Monohydrate chemical structure

Nitrofurantoin Monohydrate

CAS: 17140-81-7
Formula: C₈H₈N₄O₆
MW: 256.17 g/mol

VQ-032191

Reference Standard

Nitrofurantoin Related Compound A chemical structure

Nitrofurantoin Related Compound A

CAS: 63981-22-6
Formula: C₈H₈N₄O₆
MW: 256.17 g/mol

VQ-005393

Reference Standard

Nitrofurantoin-13C3 chemical structure

Nitrofurantoin-13C3

CAS: 1217226-46-4
Formula: C₈H₆N₄O₅
MW: 241.14 g/mol

VQ-032193

Reference Standard

Nitrofurazone chemical structure

CAS: 59-87-0
Formula: C₆H₆N₄O₄
MW: 198.14 g/mol

VQ-026932

Reference Standard

Nitrofurazone-13C,15N2 chemical structure

Nitrofurazone-13C,15N2

CAS: 1217220-85-3
Formula: C₆H₆N₄O₄
MW: 201.12 g/mol

VQ-038670

Reference Standard

Nitromethane-d3 chemical structure

Nitromethane-d3

CAS: 13031-32-8
Formula: CH₃NO₂
MW: 64.06 g/mol

VQ-041162

Reference Standard

Nitroproparacaine Hydrochloride chemical structure

Nitroproparacaine Hydrochloride

CAS: 35288-46-1
Formula: C₁₆H₂₅ClN₂O₅
MW: 360.8 g/mol

VQ-027657

Reference Standard

Nitropropoxybenzoic Acid chemical structure

Nitropropoxybenzoic Acid

CAS: 35288-44-9
Formula: C₁₀H₁₁NO₅
MW: 225.2 g/mol

VQ-027656

Reference Standard

Nitrosamine chemical structure

CAS: 35576-91-1
Formula: H₂N₂O
MW: 46.03 g/mol

VQ-043478

Reference Standard

Nitroscanate chemical structure

CAS: 19881-18-6
Formula: C₁₃H₈N₂O₃S
MW: 272.28 g/mol

VQ-032774

Reference Standard

Nitroso Enalapril Impurity C

Nitroso Enalapril Impurity C

Formula: C₁₈H₂₃N₃O₆
MW: 377.39 g/mol

In stock

Reference Standard

Nitroso Irbesartan chemical structure

Nitroso Irbesartan

CAS: 2768787-11-5
Formula: C₂₅H₂₇N₇O₂
MW: 457.5 g/mol

VQ-037731

Reference Standard

Nitroso L-Arginine chemical structure

Nitroso L-Arginine

CAS: 2492451-27-9
Formula: C₆H₁₃N₅O₃
MW: 203.2 g/mol

VQ-026369

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