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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

Valsartan Impurity 24 chemical structure

Valsartan Impurity 24

CAS: 1283097-98-2
Formula: C₂₄H₂₇N₅O₃
MW: 433.5 g/mol

VQ-042803

Reference Standard

Valsartan Impurity 35 Hydrochloride

Valsartan Impurity 35 Hydrochloride

CAS: 2249844-72-0
Formula: C₂₀H₂₃ClN₂O₂
MW: 358.87 g/mol

VQ-042810

Reference Standard

Valsartan Impurity 37

Valsartan Impurity 37

CAS: 2044711-51-3
Formula: C₂₄H₂₉N₅O₃
MW: 435.52 g/mol

VQ-042807

Reference Standard

Valsartan Impurity 8 (Freebase) chemical structure

Valsartan Impurity 8 (Freebase)

CAS: 137863-89-9
Formula: C₂₀H₂₂N₂O₂
MW: 322.4 g/mol

VQ-006098

Reference Standard

Valsartan Impurity 8 (Hydrochloride) chemical structure

Valsartan Impurity 8 (Hydrochloride)

CAS: 482577-59-3
Formula: C₂₀H₂₃ClN₂O₂
MW: 358.9 g/mol

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Reference Standard

Valsartan L-Luceine

Valsartan L-Luceine

CAS: 137863-55-9
Formula: C₂₅H₃₁N₅O₃
MW: 449.6 g/mol

VQ-044623

Reference Standard

Valsartan N-Formyl Impurity chemical structure

Valsartan N-Formyl Impurity

CAS: 1418314-03-0
Formula: C₂₀H₂₁N₅O₃
MW: 379.4 g/mol

VQ-028626

Reference Standard

Valsartan Racemic Mixture chemical structure

Valsartan Racemic Mixture

CAS: 943333-68-4
Formula: C₂₄H₂₉N₅O₃
MW: 435.5 g/mol

VQ-034538

Reference Standard

Valsartan Tetrazol Dimer Impurity chemical structure

Valsartan Tetrazol Dimer Impurity

CAS: 1353844-75-3
Formula: C₃₃H₃₁N₉O₂
MW: 585.7 g/mol

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Reference Standard

Vancomycin Didechloro Impurity chemical structure

Vancomycin Didechloro Impurity

CAS: 98510-30-6
Formula: C₆₆H₇₇N₉O₂₄
MW: 1380.4 g/mol

VQ-028910

Reference Standard

Vancomycin Methyl Ester chemical structure

Vancomycin Methyl Ester

CAS: 250273-66-6
Formula: C₆₇H₇₇Cl₂N₉O₂₄
MW: 1463.3 g/mol

VQ-034540

Reference Standard

Vandetanib Impurity 2 chemical structure

Vandetanib Impurity 2

CAS: 196603-96-0
Formula: C₁₅H₁₁BrFN₃O₂
MW: 364.17 g/mol

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Reference Standard

Vandetanib Impurity 3 chemical structure

Vandetanib Impurity 3

CAS: 768350-54-5
Formula: C₂₂H₁₇BrFN₃O₂
MW: 454.3 g/mol

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Reference Standard

Vanillylamine Hydrochloride chemical structure

Vanillylamine Hydrochloride

CAS: 7149-10-2
Formula: C₈H₁₂ClNO₂
MW: 189.64 g/mol

VQ-028634

Reference Standard

Vardenafil Impurity 1 chemical structure

Vardenafil Impurity 1

CAS: 1417529-67-9
Formula: C₁₇H₁₈N₄O₄
MW: 342.35 g/mol

VQ-028636

Reference Standard

Vardenafil Impurity 2 chemical structure

Vardenafil Impurity 2

CAS: 1417529-69-1
Formula: C₂₃H₃₀N₆O₆S
MW: 518.6 g/mol

VQ-028638

Reference Standard

Vardenafil Impurity 4 chemical structure

Vardenafil Impurity 4

CAS: 448184-56-3
Formula: C₂₁H₂₆N₆O₇S
MW: 506.5 g/mol

VQ-042821

Reference Standard

Vardenafil Oxopiperazine (Impurity) chemical structure

Vardenafil Oxopiperazine (Impurity)

CAS: 448184-58-5
Formula: C₂₁H₂₆N₆O₅S
MW: 474.5 g/mol

VQ-035024

Reference Standard

Varenicline Amine Impurity chemical structure

Varenicline Amine Impurity

CAS: 230615-56-2
Formula: C₁₃H₁₃F₃N₂O
MW: 270.25 g/mol

VQ-006103

Reference Standard

Varenicline Diamine Impurity chemical structure

Varenicline Diamine Impurity

CAS: 230615-69-7
Formula: C₁₃H₁₄F₃N₃O
MW: 285.26 g/mol

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Reference Standard

Varenicline Dioxo Impurity(N-1) Stage

Varenicline Dioxo Impurity(N-1) Stage

Formula: C₁₅H₁₂F₃N₃O₃
MW: 339.27 g/mol

In stock

Reference Standard

Varenicline Hydroxy Impurity chemical structure

Varenicline Hydroxy Impurity

CAS: 357424-21-6
Formula: C₁₃H₁₃N₃O
MW: 227.26 g/mol

In stock

Reference Standard

Varenicline Hydroxy Impurity Stage-01

Varenicline Hydroxy Impurity Stage-01

Formula: C₁₆H₁₂F₃N₃O₂
MW: 335.28 g/mol

In stock

Reference Standard

Varenicline Hydroxy Impurity Stage-02

Varenicline Hydroxy Impurity Stage-02

Formula: C₁₆H₁₄F₃N₃O₂
MW: 337.3 g/mol

In stock

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