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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

Etravirine Impurity 5 chemical structure

Etravirine Impurity 5

CAS: 269055-04-1
Formula: C₂₀H₁₄BrN₅O
MW: 420.3 g/mol

VQ-030633

Reference Standard

Etravirine Impurity 6 chemical structure

Etravirine Impurity 6

CAS: 1704730-70-0
Formula: C₂₉H₂₁BrN₆O₂
MW: 565.4 g/mol

In stock

Reference Standard

Eupatilin chemical structure

CAS: 22368-21-4
Formula: C₁₈H₁₆O₇
MW: 344.3 g/mol

VQ-030634

Reference Standard

Everolimus Isomer C chemical structure

Everolimus Isomer C

CAS: 908340-97-6
Formula: C₅₃H₈₃NO₁₄
MW: 958.2 g/mol

VQ-030642

Reference Standard

Evobrutinib Advanced Benzoyl Impurity

Evobrutinib Advanced Benzoyl Impurity

CAS: 1892599-90-4
Formula: C₁₄H₁₇FN₂O₂
MW: 264.3 g/mol

VQ-048610

Reference Standard

Evosimendan Dimer Impurity chemical structure

Evosimendan Dimer Impurity

CAS: 618458-79-0
Formula: C₃₀H₃₀N₁₂O₃
MW: 606.6 g/mol

VQ-026455

Reference Standard

Exemestane Diol Impurity chemical structure

Exemestane Diol Impurity

CAS: 184972-11-0
Formula: C₂₀H₂₆O₄
MW: 330.4 g/mol

VQ-030650

Reference Standard

Exemestane Related Compound

Exemestane Related Compound

CAS: 861398-01-8
Formula: C₂₁H₂₈O₃
MW: 328.45 g/mol

VQ-030643

Reference Standard

exo-2,3-Norbornanedicarboxylic Acid Monoamide chemical structure

exo-2,3-Norbornanedicarboxylic Acid Monoamide

CAS: 1365987-23-0
Formula: C₉H₁₃NO₃
MW: 183.2 g/mol

VQ-038214

Reference Standard

Ezetimibe (3S,4S,3'R)-Isomer chemical structure

Ezetimibe (3S,4S,3'R)-Isomer

CAS: 1478664-18-4
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

VQ-025699

Reference Standard

Ezetimibe (RRR) Isomer Impurity chemical structure

Ezetimibe (RRR) Isomer Impurity

CAS: 1593542-96-1
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

In stock

Reference Standard

Ezetimibe (RRS) Isomer Impurity chemical structure

Ezetimibe (RRS) Isomer Impurity

CAS: 163380-16-3
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

VQ-004947

Reference Standard

Ezetimibe (RSR) Isomer Impurity chemical structure

Ezetimibe (RSR) Isomer Impurity

CAS: 1376614-99-1
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

VQ-004948

Reference Standard

Ezetimibe (SRR) Isomer Impurity chemical structure

Ezetimibe (SRR) Isomer Impurity

CAS: 1478664-02-6
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

VQ-004949

Reference Standard

Ezetimibe (SSR) Isomer Impurity chemical structure

Ezetimibe (SSR) Isomer Impurity

CAS: 1593543-00-0
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

In stock

Reference Standard

Ezetimibe (SSS) Isomer Impurity chemical structure

Ezetimibe (SSS) Isomer Impurity

CAS: 1593543-07-7
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

VQ-004951

Reference Standard

Ezetimibe 2-Fluoro impurity chemical structure

Ezetimibe 2-Fluoro impurity

CAS: 2514695-40-8
Formula: C₂₀H₁₈FNO₄
MW: 355.4 g/mol

VQ-022626

Reference Standard

Ezetimibe 3-Dehydroxy Impurity chemical structure

Ezetimibe 3-Dehydroxy Impurity

CAS: 204589-58-2
Formula: C₂₄H₂₁F₂NO₂
MW: 393.4 g/mol

In stock

Reference Standard

Ezetimibe 3-Fluoro Impurity chemical structure

Ezetimibe 3-Fluoro Impurity

CAS: 1700622-06-5
Formula: C₂₄H₂₁F₂NO₃
MW: 409.4 g/mol

In stock

Reference Standard

Ezetimibe and Ezetimibe (RRS) Isomer Impurity Mixture

Ezetimibe and Ezetimibe (RRS) Isomer Impurity Mixture

Formula: C₂₄H₂₁F₂NO₃
MW: 409.43 g/mol

In stock

Reference Standard

Ezetimibe Anhydro (E)-Isomer chemical structure

Ezetimibe Anhydro (E)-Isomer

CAS: 204589-68-4
Formula: C₂₄H₁₉F₂NO₂
MW: 391.4 g/mol

VQ-025693

Reference Standard

Ezetimibe Aniline Impurity chemical structure

Ezetimibe Aniline Impurity

CAS: 1354716-98-5
Formula: C₂₄H₂₂F₂N₂O₂
MW: 408.4 g/mol

VQ-037187

Reference Standard

Ezetimibe Azetidinone Ring opened impurity chemical structure

Ezetimibe Azetidinone Ring opened impurity

CAS: 1391053-63-6
Formula: C₂₄H₂₃F₂NO₄
MW: 427.4 g/mol

VQ-025697

Reference Standard

Ezetimibe Benzyl Diol Impurity chemical structure

Ezetimibe Benzyl Diol Impurity

CAS: 1374250-06-2
Formula: C₃₁H₃₁F₂NO₃
MW: 503.6 g/mol

VQ-030659

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