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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

Remifentanil EP Impurity H chemical structure

Remifentanil EP Impurity H

CAS: 968-86-5
Formula: C₁₉H₂₁N₃
MW: 291.4 g/mol

VQ-043258

Reference Standard

Remifentanil EP Impurity J chemical structure

Remifentanil EP Impurity J

CAS: 61085-60-7
Formula: C₂₀H₂₄N₂O₂
MW: 324.4 g/mol

VQ-043259

Reference Standard

Remimazolam chemical structure

CAS: 1449295-42-4
Formula: C₂₁H₁₉BrN₄O₂
MW: 439.3 g/mol

VQ-048936

Reference Standard

Remimazolam isopropyl ester

Remimazolam isopropyl ester

CAS: 1860899-60-0
Formula: C₂₃H₂₃BrN₄O₂
MW: 467.36 g/mol

VQ-041867

Reference Standard

Remimazolam S-Isomer Acid Impurity chemical structure

Remimazolam S-Isomer Acid Impurity

CAS: 960305-91-3
Formula: C₂₀H₁₇BrN₄O₂
MW: 425.3 g/mol

VQ-033496

Reference Standard

Remogliflozin chemical structure

CAS: 329045-45-6
Formula: C₂₃H₃₄N₂O₇
MW: 450.5 g/mol

VQ-033497

Reference Standard

Remogliflozin alpha Isomer chemical structure

Remogliflozin alpha Isomer

CAS: 2170718-60-0
Formula: C₂₃H₃₄N₂O₇
MW: 450.5 g/mol

VQ-041868

Reference Standard

Remogliflozin Etabonate chemical structure

Remogliflozin Etabonate

CAS: 442201-24-3
Formula: C₂₆H₃₈N₂O₉
MW: 522.6 g/mol

VQ-027773

Reference Standard

Remogliflozin-d7 chemical structure

Remogliflozin-d7

CAS: 1233516-73-8
Formula: C₂₃H₃₄N₂O₇
MW: 457.6 g/mol

VQ-044982

Reference Standard

Repaglinide chemical structure

CAS: 135062-02-1
Formula: C₂₇H₃₆N₂O₄
MW: 452.6 g/mol

VQ-027774

Reference Standard

Repaglinide EP Impurity A chemical structure

Repaglinide EP Impurity A

CAS: 220438-80-2
Formula: C₁₁H₁₂O₅
MW: 224.21 g/mol

VQ-027775

Reference Standard

Repaglinide EP Impurity B chemical structure

Repaglinide EP Impurity B

CAS: 99469-99-5
Formula: C₁₃H₁₆O₅
MW: 252.26 g/mol

VQ-027776

Reference Standard

Repaglinide EP Impurity C chemical structure

Repaglinide EP Impurity C

CAS: 147769-93-5
Formula: C₁₆H₂₆N₂
MW: 246.39 g/mol

VQ-033499

Reference Standard

Repaglinide EP Impurity C (Glutamate Salt) chemical structure

Repaglinide EP Impurity C (Glutamate Salt)

CAS: 219921-94-5
Formula: C₂₃H₃₇N₃O₅
MW: 435.6 g/mol

VQ-027777

Reference Standard

Repaglinide EP Impurity D chemical structure

Repaglinide EP Impurity D

CAS: 147770-06-7
Formula: C₂₉H₄₀N₂O₄
MW: 480.6 g/mol

VQ-027779

Reference Standard

Repaglinide EP Impurity E chemical structure

Repaglinide EP Impurity E

CAS: 147852-26-4
Formula: C₂₇H₃₆N₂O₄
MW: 452.6 g/mol

VQ-027778

Reference Standard

Repaglinide Impurity 13 chemical structure

Repaglinide Impurity 13

CAS: 765306-65-8
Formula: C₁₆H₂₄N₂O
MW: 260.37 g/mol

VQ-041872

Reference Standard

Repaglinide Impurity 7

Repaglinide Impurity 7

CAS: 1039989-55-3
Formula: C₁₆H₂₆N₂
MW: 246.39 g/mol

VQ-041870

Reference Standard

Repaglinide N-Oxide chemical structure

Repaglinide N-Oxide

CAS: 121167-81-5
Formula: C₂₇H₃₆N₂O₅
MW: 468.6 g/mol

VQ-043920

Reference Standard

Repaglinide-d5 chemical structure

CAS: 1217709-85-7
Formula: C₂₇H₃₆N₂O₄
MW: 457.6 g/mol

VQ-027780

Reference Standard

Reproterol chemical structure

CAS: 54063-54-6
Formula: C₁₈H₂₃N₅O₅
MW: 389.4 g/mol

VQ-033504

Reference Standard

Reserpine chemical structure

CAS: 50-55-5
Formula: C₃₃H₄₀N₂O₉
MW: 608.7 g/mol

In stock

Reference Standard

Resiniferatoxin chemical structure

Resiniferatoxin

CAS: 57444-62-9
Formula: C₃₇H₄₀O₉
MW: 628.7 g/mol

VQ-040636

Reference Standard

Resmethrin chemical structure

CAS: 10453-86-8
Formula: C₂₂H₂₆O₃
MW: 338.4 g/mol

VQ-041875

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