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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

Secnidazole Impurity B chemical structure

Secnidazole Impurity B

CAS: 56750-04-0
Formula: C₇H₁₁N₃O₃
MW: 185.18 g/mol

VQ-027995

Reference Standard

Seco Everolimus B chemical structure

Seco Everolimus B

CAS: 769905-89-7
Formula: C₅₃H₈₅NO₁₅
MW: 976.2 g/mol

VQ-030639

Reference Standard

Seco Rapamycin chemical structure

CAS: 147438-27-5
Formula: C₅₁H₇₉NO₁₃
MW: 914.2 g/mol

VQ-007745

Reference Standard

Seco Rapamycin Sodium Salt chemical structure

Seco Rapamycin Sodium Salt

CAS: 148554-65-8
Formula: C₅₁H₇₈NNaO₁₃
MW: 936.2 g/mol

In stock

Reference Standard

Seco-Temsirolimus chemical structure

Seco-Temsirolimus

CAS: 1062122-60-4
Formula: C₅₆H₈₇NO₁₆
MW: 1030.3 g/mol

VQ-043315

Reference Standard

Secoisolariciresinol chemical structure

Secoisolariciresinol

CAS: 29388-59-8
Formula: C₂₀H₂₆O₆
MW: 362.4 g/mol

VQ-042121

Reference Standard

Secophenol chemical structure

CAS: 2394-69-6
Formula: C₁₉H₂₄O₃
MW: 300.4 g/mol

VQ-042122

Reference Standard

Secorapamycin B chemical structure

Secorapamycin B

CAS: 185107-79-3
Formula: C₅₁H₈₁NO₁₄
MW: 932.2 g/mol

VQ-033866

Reference Standard

Segesterone Acetate chemical structure

Segesterone Acetate

CAS: 7759-35-5
Formula: C₂₃H₃₀O₄
MW: 370.5 g/mol

VQ-033793

Reference Standard

Seladelpar chemical structure

CAS: 851528-79-5
Formula: C₂₁H₂₃F₃O₅S
MW: 444.5 g/mol

VQ-033794

Reference Standard

Seladelpar Methyl Impurity

Seladelpar Methyl Impurity

CAS: 851528-77-3
Formula: C₂₀H₂₁F₃O₅S
MW: 430.4 g/mol

VQ-042125

Reference Standard

Seladelpar sulfoxide chemical structure

Seladelpar sulfoxide

CAS: 851529-42-5
Formula: C₂₁H₂₃F₃O₆S
MW: 460.5 g/mol

VQ-033796

Reference Standard

Selamectin chemical structure

CAS: 220119-17-5
Formula: C₄₃H₆₃NO₁₁
MW: 770 g/mol

VQ-033798

Reference Standard

Selamectin EP Impurity A chemical structure

Selamectin EP Impurity A

CAS: 165108-08-7
Formula: C₄₃H₆₃NO₁₂
MW: 786 g/mol

VQ-033799

Reference Standard

Selamectin EP Impurity B chemical structure

Selamectin EP Impurity B

CAS: 165108-09-8
Formula: C₄₃H₆₁NO₁₁
MW: 767.9 g/mol

VQ-027996

Reference Standard

Selamectin EP Impurity D chemical structure

Selamectin EP Impurity D

CAS: 301849-46-7
Formula: C₅₀H₇₅NO₁₄
MW: 914.1 g/mol

VQ-027997

Reference Standard

Selatinib chemical structure

CAS: 1275595-86-2
Formula: C₂₉H₂₆ClFN₄O₃S
MW: 565.1 g/mol

VQ-026367

Reference Standard

Selegiline EP Impurity D chemical structure

Selegiline EP Impurity D

CAS: 56862-28-3
Formula: C₁₂H₁₅N
MW: 173.25 g/mol

VQ-045262

Reference Standard

Selegiline EP Impurity E chemical structure

Selegiline EP Impurity E

CAS: 4528-51-2
Formula: C₁₃H₁₇N
MW: 187.28 g/mol

VQ-027998

Reference Standard

Selegiline Hydrochloride chemical structure

Selegiline Hydrochloride

CAS: 14611-52-0
Formula: C₁₃H₁₈ClN
MW: 223.74 g/mol

VQ-033800

Reference Standard

Selegiline Hydrochloride EP Impurity D chemical structure

Selegiline Hydrochloride EP Impurity D

CAS: 2588-96-7
Formula: C₁₂H₁₆ClN
MW: 209.71 g/mol

VQ-033801

Reference Standard

Selexipag chemical structure

CAS: 475086-01-2
Formula: C₂₆H₃₂N₄O₄S
MW: 496.6 g/mol

In stock

Reference Standard

Selexipag Acid Impurity chemical structure

Selexipag Acid Impurity

CAS: 475085-57-5
Formula: C₂₅H₂₉N₃O₃
MW: 419.5 g/mol

In stock

Reference Standard

Selexipag Active Metabolite D7 chemical structure

Selexipag Active Metabolite D7

CAS: 1265295-20-2
Formula: C₂₅H₂₉N₃O₃
MW: 426.6 g/mol

VQ-042132

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