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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

Vonoprazan Impurity 283

Vonoprazan Impurity 283

Formula: C₂₁H₂₀FN₃O₆S
MW: 461.46 g/mol

In stock

Reference Standard

Vonoprazan Impurity 283 (Intermediate Stage I) chemical structure

Vonoprazan Impurity 283 (Intermediate Stage I)

CAS: 928324-73-6
Formula: C₁₆H₁₁FN₂O₃S
MW: 330.3 g/mol

In stock

Reference Standard

Vonoprazan Impurity 283 (Intermediate Stage II)

Vonoprazan Impurity 283 (Intermediate Stage II)

Formula: C₁₈H₁₅FN₂O₄S
MW: 374.39 g/mol

In stock

Reference Standard

Vonoprazan Impurity 5 Fumarate Salt

Vonoprazan Impurity 5 Fumarate Salt

CAS: 1885094-64-3
Formula: C₁₆H₁₇FN₂O₄
MW: 320.32 g/mol

VQ-042940

Reference Standard

Vonoprazan Sulfonyl Aldehyde Impurity chemical structure

Vonoprazan Sulfonyl Aldehyde Impurity

CAS: 881677-11-8
Formula: C₁₆H₁₁FN₂O₃S
MW: 330.3 g/mol

VQ-024024

Reference Standard

Voriconazole (2R,3R)-Isomer chemical structure

Voriconazole (2R,3R)-Isomer

CAS: 137234-76-5
Formula: C₁₆H₁₄Cl₂F₃N₅O
MW: 420.2 g/mol

VQ-006179

Reference Standard

Voriconazole Bromo Hydroxyl Impurity chemical structure

Voriconazole Bromo Hydroxyl Impurity

Formula: C₆H₆BrFN₂O
MW: 221.03 g/mol

In stock

Reference Standard

Voriconazole Dibromo Impurity-5 chemical structure

Voriconazole Dibromo Impurity-5

CAS: 908352-44-3
Formula: C₆H₄Br₂ClFN₂
MW: 318.37 g/mol

In stock

Reference Standard

Voriconazole Impurity 31 chemical structure

Voriconazole Impurity 31

CAS: 351042-08-5
Formula: C₁₀H₇F₂N₃O
MW: 223.18 g/mol

VQ-045359

Reference Standard

Voriconazole Impurity-3

Voriconazole Impurity-3

Formula: C₁₈H₁₆F₃N₃O.C₁₀H₁₆O₄S
MW: 579.63 g/mol

In stock

Reference Standard

Voriconazole Impurity-5 chemical structure

Voriconazole Impurity-5

CAS: 137234-74-3
Formula: C₆H₆ClFN₂
MW: 160.58 g/mol

In stock

Reference Standard

Vorinostat Amide Impurity chemical structure

Vorinostat Amide Impurity

CAS: 1305124-48-4
Formula: C₁₄H₂₀N₂O₂
MW: 248.32 g/mol

VQ-044602

Reference Standard

Vortioxetine 3,4-isomer Hydrochloride chemical structure

Vortioxetine 3,4-isomer Hydrochloride

CAS: 1293342-97-8
Formula: C₁₈H₂₃ClN₂S
MW: 334.9 g/mol

VQ-042947

Reference Standard

Vortioxetine Dimer impurity chemical structure

Vortioxetine Dimer impurity

CAS: 2476761-84-7
Formula: C₃₈H₄₄N₄OS₂
MW: 636.9 g/mol

VQ-042950

Reference Standard

Vortioxetine Ethanediamine Dimer Impurity chemical structure

Vortioxetine Ethanediamine Dimer Impurity

CAS: 1928741-85-8
Formula: C₃₂H₃₇N₃S₂
MW: 527.8 g/mol

VQ-035494

Reference Standard

Vortioxetine Glucose Adduct chemical structure

Vortioxetine Glucose Adduct

CAS: 2135577-60-3
Formula: C₂₄H₃₂N₂O₅S
MW: 460.6 g/mol

VQ-042949

Reference Standard

Vortioxetine Impurity 16 chemical structure

Vortioxetine Impurity 16

CAS: 16704-47-5
Formula: C₁₄H₁₄S
MW: 214.33 g/mol

VQ-034693

Reference Standard

Vortioxetine Impurity 4 chemical structure

Vortioxetine Impurity 4

CAS: 1293489-77-6
Formula: C₁₈H₂₂N₂S
MW: 298.4 g/mol

VQ-035504

Reference Standard

Vortioxetine Sulfone chemical structure

Vortioxetine Sulfone

CAS: 1639263-80-1
Formula: C₁₈H₂₂N₂O₂S
MW: 330.4 g/mol

VQ-028752

Reference Standard

Voxelotor Impurity 1 chemical structure

Voxelotor Impurity 1

CAS: 1282518-60-8
Formula: C₁₂H₂₁BN₂O₂
MW: 236.12 g/mol

VQ-042955

Reference Standard

Voxelotor Impurity 2 chemical structure

Voxelotor Impurity 2

CAS: 84290-49-3
Formula: C₉H₁₀O₄
MW: 182.17 g/mol

VQ-042956

Reference Standard

Warfarin Alcohol (Mixture of Diastereomers) chemical structure

Warfarin Alcohol (Mixture of Diastereomers)

CAS: 28392-96-3
Formula: C₁₉H₁₈O₄
MW: 310.3 g/mol

VQ-028765

Reference Standard

Warfarin Sodium - Impurity A chemical structure

Warfarin Sodium - Impurity A

CAS: 15156-56-6
Formula: C₁₈H₁₆O₂
MW: 264.3 g/mol

VQ-024035

Reference Standard

Warfarin Sodium Clathrate chemical structure

Warfarin Sodium Clathrate

CAS: 67430-45-9
Formula: C₁₉H₁₅NaO₄
MW: 330.3 g/mol

VQ-042958

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