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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

Neratinib WS chemical structure

CAS: 698387-09-6
Formula: C₃₀H₂₉ClN₆O₃
MW: 557 g/mol

VQ-007609

Reference Standard

Neratinib-d6 chemical structure

CAS: 1259519-18-0
Formula: C₃₀H₂₉ClN₆O₃
MW: 563.1 g/mol

VQ-026871

Reference Standard

Netarsudil chemical structure

CAS: 1254032-66-0
Formula: C₂₈H₂₇N₃O₃
MW: 453.5 g/mol

In stock

Reference Standard

Netarsudil Amino Acid Impurity chemical structure

Netarsudil Amino Acid Impurity

CAS: 2684301-49-1
Formula: C₁₉H₂₁NO₄
MW: 327.4 g/mol

VQ-026874

Reference Standard

Netilmicin EP Impurity B chemical structure

Netilmicin EP Impurity B

CAS: 67666-41-5
Formula: C₁₅H₃₁N₃O₆
MW: 349.42 g/mol

VQ-032106

Reference Standard

Netilmicin EP Impurity B Sulfate chemical structure

Netilmicin EP Impurity B Sulfate

CAS: 864371-49-3
Formula: C₁₅H₃₁N₃O₆
MW: 349.42 g/mol

VQ-026877

Reference Standard

Netilmicin EP Impurity C chemical structure

Netilmicin EP Impurity C

CAS: 63721-52-8
Formula: C₂₃H₄₅N₅O₇
MW: 503.6 g/mol

VQ-028839

Reference Standard

Netilmicin EP Impurity D chemical structure

Netilmicin EP Impurity D

CAS: 63721-51-7
Formula: C₂₃H₄₅N₅O₇
MW: 503.6 g/mol

VQ-028840

Reference Standard

Netilmicin Sulfate chemical structure

Netilmicin Sulfate

CAS: 56391-57-2
Formula: C₄₂H₉₂N₁₀O₃₄S₅
MW: 1441.6 g/mol

VQ-026876

Reference Standard

Netobimin chemical structure

CAS: 88255-01-0
Formula: C₁₄H₂₀N₄O₇S₂
MW: 420.5 g/mol

VQ-049215

Reference Standard

Netupitant chemical structure

CAS: 290297-26-6
Formula: C₃₀H₃₂F₆N₄O
MW: 578.6 g/mol

VQ-026878

Reference Standard

Netupitant Carbamate Impurity chemical structure

Netupitant Carbamate Impurity

CAS: 342417-02-1
Formula: C₁₉H₂₄N₄O₂
MW: 340.4 g/mol

VQ-026879

Reference Standard

Netupitant Impurity 24 chemical structure

Netupitant Impurity 24

CAS: 342417-01-0
Formula: C₁₈H₂₂N₄O
MW: 310.4 g/mol

VQ-049219

Reference Standard

Netupitant N oxide chemical structure

Netupitant N oxide

CAS: 910808-11-6
Formula: C₃₀H₃₂F₆N₄O₂
MW: 594.6 g/mol

VQ-023236

Reference Standard

Netupitant-d6 chemical structure

CAS: 2070015-31-3
Formula: C₃₀H₃₂F₆N₄O
MW: 584.6 g/mol

VQ-032107

Reference Standard

Neurosporaxanthin chemical structure

Neurosporaxanthin

CAS: 2468-88-4
Formula: C₃₅H₄₆O₂
MW: 498.7 g/mol

VQ-045229

Reference Standard

Nevirapine chemical structure

CAS: 129618-40-2
Formula: C₁₅H₁₄N₄O
MW: 266.3 g/mol

VQ-023237

Reference Standard

Nevirapine EP Impurity A chemical structure

Nevirapine EP Impurity A

CAS: 133627-17-5
Formula: C₁₄H₁₄N₄O
MW: 254.29 g/mol

VQ-023239

Reference Standard

Nevirapine EP Impurity B chemical structure

Nevirapine EP Impurity B

CAS: 287980-84-1
Formula: C₁₂H₁₀N₄O
MW: 226.23 g/mol

VQ-023238

Reference Standard

Nevirapine EP Impurity C chemical structure

Nevirapine EP Impurity C

CAS: 287980-85-2
Formula: C₁₅H₁₆N₄O
MW: 268.31 g/mol

VQ-026880

Reference Standard

Nevirapine EP Impurity D (Free Base) chemical structure

Nevirapine EP Impurity D (Free Base)

CAS: 1391054-30-0
Formula: C₃₀H₂₆N₈O₂
MW: 530.6 g/mol

VQ-026881

Reference Standard

Nevirapine-12-(n-proylidenyl) chemical structure

Nevirapine-12-(n-proylidenyl)

CAS: 284686-27-7
Formula: C₁₈H₁₈N₄O
MW: 306.4 g/mol

VQ-032108

Reference Standard

Nevirapine-d3 chemical structure

CAS: 1051419-24-9
Formula: C₁₅H₁₄N₄O
MW: 269.32 g/mol

VQ-032112

Reference Standard

Nevirapine-d4 chemical structure

CAS: 1051418-95-1
Formula: C₁₅H₁₄N₄O
MW: 270.32 g/mol

VQ-032111

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