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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

Selexipag Ethyl ester impurity chemical structure

Selexipag Ethyl ester impurity

CAS: 2287345-22-4
Formula: C₂₇H₃₃N₃O₃
MW: 447.6 g/mol

VQ-023745

Reference Standard

Selexipag Hydroxy Impurity chemical structure

Selexipag Hydroxy Impurity

CAS: 18591-57-6
Formula: C₁₆H₁₂N₂O
MW: 248.28 g/mol

In stock

Reference Standard

Selexipag Impurity D chemical structure

Selexipag Impurity D

CAS: 475084-96-9
Formula: C₂₉H₃₇N₃O₃
MW: 475.6 g/mol

VQ-023744

Reference Standard

Selexipag Metabolite N-Oxide chemical structure

Selexipag Metabolite N-Oxide

CAS: 2732400-56-3
Formula: C₂₅H₂₉N₃O₄
MW: 435.5 g/mol

In stock

Reference Standard

Selexipag-d6 chemical structure

CAS: 1265295-92-8
Formula: C₂₆H₃₂N₄O₄S
MW: 502.7 g/mol

VQ-042134

Reference Standard

Selexipag-d7 chemical structure

CAS: 1265295-21-3
Formula: C₂₆H₃₂N₄O₄S
MW: 503.7 g/mol

VQ-042133

Reference Standard

Selinexor chemical structure

CAS: 1393477-72-9
Formula: C₁₇H₁₁F₆N₇O
MW: 443.3 g/mol

VQ-027269

Reference Standard

Selpercatinib chemical structure

CAS: 2152628-33-4
Formula: C₂₉H₃₁N₇O₃
MW: 525.6 g/mol

VQ-028000

Reference Standard

Selpercatinib Amide Impurity

Selpercatinib Amide Impurity

CAS: 2817648-27-2
Formula: C₂₉H₃₃N₇O₄
MW: 543.63 g/mol

VQ-045431

Reference Standard

Seltorexant chemical structure

CAS: 1293281-49-8
Formula: C₂₁H₂₂FN₇O
MW: 407.4 g/mol

VQ-042135

Reference Standard

Selumetinib chemical structure

CAS: 606143-52-6
Formula: C₁₇H₁₅BrClFN₄O₃
MW: 457.7 g/mol

VQ-007748

Reference Standard

Selumetinib Impurity 20 chemical structure

Selumetinib Impurity 20

CAS: 606144-02-9
Formula: C₁₆H₁₂BrClFN₃O₂
MW: 412.6 g/mol

In stock

Reference Standard

Selumetinib Impurity 21 chemical structure

Selumetinib Impurity 21

CAS: 606144-04-1
Formula: C₁₅H₁₀BrClFN₃O₂
MW: 398.61 g/mol

In stock

Reference Standard

Selumetinib Impurity-D chemical structure

Selumetinib Impurity-D

CAS: 3023039-86-0
Formula: C₂₁H₂₃BrClFN₄O₃
MW: 513.8 g/mol

VQ-042136

Reference Standard

Selumetinib Nitroso Impurity-2 chemical structure

Selumetinib Nitroso Impurity-2

CAS: 15775-74-3
Formula: C₂₁H₃₀O₂
MW: 323.5 g/mol

In stock

Reference Standard

Selumetinib Nitroso Impurity-4 chemical structure

Selumetinib Nitroso Impurity-4

Formula: C₁₇H₁₄BrClFN₅O₄
MW: 486.7 g/mol

In stock

Reference Standard

Semaglutide

CAS: 910463-68-2
Formula: C₁₈₇H₂₉₁N₄₅O₅₉
MW: 4114 g/mol

In stock

Reference Standard

Semaglutide Impurity 123 chemical structure

Semaglutide Impurity 123

CAS: 71997-93-8
Formula: C₂₃H₃₉NO₆
MW: 425.6 g/mol

VQ-045041

Reference Standard

Semaglutide Impurity 22 chemical structure

Semaglutide Impurity 22

CAS: 1118767-16-0
Formula: C₄₃H₇₉N₃O₁₃
MW: 846.1 g/mol

VQ-028002

Reference Standard

Semaglutide Impurity 6 (S-isomer) chemical structure

Semaglutide Impurity 6 (S-isomer)

CAS: 1671100-14-3
Formula: C₃₇H₆₈N₂O₁₀
MW: 700.9 g/mol

VQ-045349

Reference Standard

Semduramicin chemical structure

CAS: 113378-31-7
Formula: C₄₅H₇₆O₁₆
MW: 873.1 g/mol

VQ-034897

Reference Standard

Semduramicin sodium chemical structure

Semduramicin sodium

CAS: 119068-77-8
Formula: C₄₅H₇₅NaO₁₆
MW: 895.1 g/mol

VQ-033807

Reference Standard

Semicarbazide chemical structure

CAS: 57-56-7
Formula: CH₅N₃O
MW: 75.07 g/mol

VQ-040780

Reference Standard

Semicarbazide-13C,15N2 Hydrochloride chemical structure

Semicarbazide-13C,15N2 Hydrochloride

CAS: 1173020-16-0
Formula: CH₆ClN₃O
MW: 114.51 g/mol

VQ-042138

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