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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

Rifampicin N-oxide chemical structure

Rifampicin N-oxide

CAS: 51963-55-4
Formula: C₄₃H₅₈N₄O₁₃
MW: 838.9 g/mol

VQ-041902

Reference Standard

Rifampicin Quinone chemical structure

Rifampicin Quinone

CAS: 13983-13-6
Formula: C₄₃H₅₆N₄O₁₂
MW: 820.9 g/mol

VQ-027805

Reference Standard

Rifampicin-d3 chemical structure

CAS: 1262052-36-7
Formula: C₄₃H₅₈N₄O₁₂
MW: 826 g/mol

VQ-041898

Reference Standard

Rifamycin chemical structure

CAS: 6998-60-3
Formula: C₃₇H₄₇NO₁₂
MW: 697.8 g/mol

VQ-033538

Reference Standard

Rifamycin B chemical structure

CAS: 13929-35-6
Formula: C₃₉H₄₉NO₁₄
MW: 755.8 g/mol

VQ-027813

Reference Standard

Rifamycin O chemical structure

CAS: 14487-05-9
Formula: C₃₉H₄₇NO₁₄
MW: 753.8 g/mol

VQ-027816

Reference Standard

Rifamycin R chemical structure

CAS: 59264-04-9
Formula: C₃₇H₄₅NO₁₃
MW: 711.8 g/mol

VQ-041896

Reference Standard

Rifamycin S chemical structure

CAS: 13553-79-2
Formula: C₃₇H₄₅NO₁₂
MW: 695.8 g/mol

VQ-027807

Reference Standard

Rifamycin sodium salt chemical structure

Rifamycin sodium salt

CAS: 14897-39-3
Formula: C₃₇H₄₆NNaO₁₂
MW: 719.7 g/mol

VQ-027810

Reference Standard

Rifamycin Y chemical structure

CAS: 15271-73-5
Formula: C₃₉H₄₇NO₁₅
MW: 769.8 g/mol

VQ-027811

Reference Standard

Rifaximin chemical structure

CAS: 80621-81-4
Formula: C₄₃H₅₁N₃O₁₁
MW: 785.9 g/mol

In stock

Reference Standard

Rifaximin EP Impurity G chemical structure

Rifaximin EP Impurity G

CAS: 80621-76-7
Formula: C₄₃H₄₉N₃O₁₁
MW: 783.9 g/mol

VQ-027814

Reference Standard

Rifaximin EP Impurity H chemical structure

Rifaximin EP Impurity H

CAS: 1210022-90-4
Formula: C₄₃H₅₁N₃O₁₂
MW: 801.9 g/mol

VQ-027812

Reference Standard

Rifaximin Impurity 1 chemical structure

Rifaximin Impurity 1

CAS: 1351775-04-6
Formula: C₄₃H₄₉N₃O₁₁
MW: 783.9 g/mol

VQ-033540

Reference Standard

Rifaximin Impurity 2 chemical structure

Rifaximin Impurity 2

CAS: 1351775-03-5
Formula: C₄₃H₄₉N₃O₁₁
MW: 783.9 g/mol

VQ-027815

Reference Standard

Rifaximin-d6 chemical structure

CAS: 1262992-43-7
Formula: C₄₃H₅₁N₃O₁₁
MW: 791.9 g/mol

VQ-041903

Reference Standard

Rilmenidine chemical structure

CAS: 54187-04-1
Formula: C₁₀H₁₆N₂O
MW: 180.25 g/mol

VQ-033541

Reference Standard

Rilmenidine Dihydrogen Phosphate chemical structure

Rilmenidine Dihydrogen Phosphate

CAS: 85409-38-7
Formula: C₁₀H₁₉N₂O₅P
MW: 278.24 g/mol

VQ-041906

Reference Standard

Rilmenidine Impurity A chemical structure

Rilmenidine Impurity A

CAS: 54187-44-9
Formula: C₁₀H₁₈N₂O₂
MW: 198.26 g/mol

VQ-041907

Reference Standard

Rilpivirine chemical structure

CAS: 500287-72-9
Formula: C₂₂H₁₈N₆
MW: 366.4 g/mol

VQ-007715

Reference Standard

Rilpivirine Amide Impurity 1 chemical structure

Rilpivirine Amide Impurity 1

CAS: 500288-66-4
Formula: C₂₂H₂₀N₆O
MW: 384.4 g/mol

In stock

Reference Standard

Rilpivirine Amide Impurity(N-1) chemical structure

Rilpivirine Amide Impurity(N-1)

CAS: 374067-85-3
Formula: C₁₉H₁₆BrN₅
MW: 394.3 g/mol

In stock

Reference Standard

Rilpivirine Hydrochloride chemical structure

Rilpivirine Hydrochloride

CAS: 700361-47-3
Formula: C₂₂H₁₉ClN₆
MW: 402.9 g/mol

In stock

Reference Standard

Rilpivirine Impurity 1 chemical structure

Rilpivirine Impurity 1

CAS: 1629023-90-0
Formula: C₁₈H₁₂N₆
MW: 312.3 g/mol

VQ-027820

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