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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

Riboflavin EP Impurity A chemical structure

Riboflavin EP Impurity A

CAS: 1088-56-8
Formula: C₁₃H₁₂N₄O₂
MW: 256.26 g/mol

VQ-024019

Reference Standard

Riboflavin EP Impurity B chemical structure

Riboflavin EP Impurity B

CAS: 1086-80-2
Formula: C₁₂H₁₀N₄O₂
MW: 242.23 g/mol

VQ-024020

Reference Standard

Riboflavin EP Impurity C chemical structure

Riboflavin EP Impurity C

CAS: 2535-20-8
Formula: C₁₃H₁₈N₄O₆
MW: 326.31 g/mol

VQ-024021

Reference Standard

Riboflavin EP Impurity D chemical structure

Riboflavin EP Impurity D

CAS: 52134-62-0
Formula: C₁₇H₂₀N₄O₇
MW: 392.4 g/mol

VQ-034892

Reference Standard

Riboflavin Impurity 3 chemical structure

Riboflavin Impurity 3

CAS: 64480-68-8
Formula: C₁₆H₂₀N₂O₇
MW: 352.34 g/mol

VQ-034660

Reference Standard

Riboflavin Sodium Phosphate EP Impurity A chemical structure

Riboflavin Sodium Phosphate EP Impurity A

CAS: 86108-27-2
Formula: C₁₇H₂₂N₄O₁₂P₂
MW: 536.3 g/mol

VQ-028730

Reference Standard

Riboflavin Sodium Phosphate EP Impurity B chemical structure

Riboflavin Sodium Phosphate EP Impurity B

CAS: 86108-26-1
Formula: C₁₇H₂₂N₄O₁₂P₂
MW: 536.3 g/mol

VQ-024022

Reference Standard

Riboflavin Sodium Phosphate EP Impurity C chemical structure

Riboflavin Sodium Phosphate EP Impurity C

CAS: 86108-25-0
Formula: C₁₇H₂₂N₄O₁₂P₂
MW: 536.3 g/mol

VQ-028727

Reference Standard

Riboflavin Sodium Phosphate Salt chemical structure

Riboflavin Sodium Phosphate Salt

CAS: 130-40-5
Formula: C₁₇H₂₀N₄NaO₉P
MW: 478.3 g/mol

In stock

Reference Standard

Riboflavin Tetrabutyrate chemical structure

Riboflavin Tetrabutyrate

CAS: 752-56-7
Formula: C₃₃H₄₄N₄O₁₀
MW: 656.7 g/mol

VQ-035087

Reference Standard

Riboflavin-3'-Phosphate chemical structure

Riboflavin-3'-Phosphate

CAS: 80400-93-7
Formula: C₁₇H₂₁N₄O₉P
MW: 456.3 g/mol

VQ-028728

Reference Standard

Riboflavin-4'-phosphate chemical structure

Riboflavin-4'-phosphate

CAS: 60697-29-2
Formula: C₁₇H₂₁N₄O₉P
MW: 456.3 g/mol

VQ-028729

Reference Standard

Riboflavin-4'-Phosphate Sodium chemical structure

Riboflavin-4'-Phosphate Sodium

CAS: 494789-91-2
Formula: C₁₇H₂₀N₄NaO₉P
MW: 478.3 g/mol

VQ-042921

Reference Standard

Ribostamycin chemical structure

CAS: 25546-65-0
Formula: C₁₇H₃₄N₄O₁₀
MW: 454.5 g/mol

VQ-033534

Reference Standard

Ribostamycin Sulfate chemical structure

Ribostamycin Sulfate

CAS: 53797-35-6
Formula: C₁₇H₃₆N₄O₁₄S
MW: 552.6 g/mol

VQ-033533

Reference Standard

Ridinilazole chemical structure

CAS: 308362-25-6
Formula: C₂₄H₁₆N₆
MW: 388.4 g/mol

VQ-027797

Reference Standard

Rifabutin chemical structure

CAS: 72559-06-9
Formula: C₄₆H₆₂N₄O₁₁
MW: 847 g/mol

VQ-027798

Reference Standard

Rifabutin - Impurity D chemical structure

Rifabutin - Impurity D

CAS: 62041-01-4
Formula: C₃₇H₄₇N₃O₁₁
MW: 709.8 g/mol

VQ-027800

Reference Standard

Rifabutin EP Impurity A chemical structure

Rifabutin EP Impurity A

CAS: 72544-16-2
Formula: C₉H₁₇NO
MW: 155.24 g/mol

VQ-027801

Reference Standard

Rifabutin EP Impurity B chemical structure

Rifabutin EP Impurity B

CAS: 51756-80-0
Formula: C₃₇H₄₆N₂O₁₂
MW: 710.8 g/mol

VQ-027799

Reference Standard

Rifabutin EP Impurity C chemical structure

Rifabutin EP Impurity C

CAS: 2241829-23-0
Formula: C₄₆H₆₀N₄O₁₁
MW: 845 g/mol

VQ-027802

Reference Standard

Rifabutin EP Impurity E

Rifabutin EP Impurity E

CAS: 100324-63-8
Formula: C₄₄H₆₀N₄O₁₀
MW: 804.97 g/mol

VQ-033535

Reference Standard

Rifabutin N-Oxide

Rifabutin N-Oxide

CAS: 645406-37-7
Formula: C₄₆H₆₂N₄O₁₂
MW: 863 g/mol

VQ-034893

Reference Standard

Rifampicin N-Oxide chemical structure

Rifampicin N-Oxide

CAS: 125833-03-6
Formula: C₄₃H₅₈N₄O₁₃
MW: 838.9 g/mol

VQ-027804

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