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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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COA + SDSwith every lot

Reference Standard

Empagliflozin R-Isomer Impurity chemical structure

Empagliflozin R-Isomer Impurity

CAS: 864070-43-9
Formula: C₂₃H₂₇ClO₇
MW: 450.9 g/mol

VQ-004876

Reference Standard

Empagliflozin Silyl Impurity chemical structure

Empagliflozin Silyl Impurity

CAS: 2819995-58-7
Formula: C₂₀H₂₅ClO₂Si
MW: 360.9 g/mol

VQ-022511

Reference Standard

Empagliflozin Sulphonic Impurity chemical structure

Empagliflozin Sulphonic Impurity

CAS: 2514922-33-7
Formula: C₁₀H₁₂O₄S
MW: 228.27 g/mol

In stock

Reference Standard

Emtricitabine 1,3-dioxolane Carboxylic Acid Impurity

Emtricitabine 1,3-dioxolane Carboxylic Acid Impurity

CAS: 2518282-37-4
Formula: C₈H₈FN₃O₅
MW: 245.2 g/mol

VQ-025536

Reference Standard

Emtricitabine Desamino Impurity chemical structure

Emtricitabine Desamino Impurity

CAS: 1055312-45-2
Formula: C₈H₉FN₂O₃S
MW: 232.23 g/mol

VQ-030470

Reference Standard

Emtricitabine Dimer Impurity chemical structure

Emtricitabine Dimer Impurity

CAS: 1962114-97-1
Formula: C₁₇H₂₀F₂N₆O₆S₂
MW: 506.5 g/mol

In stock

Reference Standard

Emtricitabine Disulfide chemical structure

Emtricitabine Disulfide

CAS: 2331211-44-8
Formula: C₁₆H₁₈F₂N₆O₄S₄
MW: 524.6 g/mol

VQ-025533

Reference Standard

Emtricitabine Impurity 3 chemical structure

Emtricitabine Impurity 3

CAS: 1246819-86-2
Formula: C₉H₁₂FN₃O₂S₂
MW: 277.3 g/mol

VQ-048204

Reference Standard

Emtricitabine Menthyl Ester Impurity chemical structure

Emtricitabine Menthyl Ester Impurity

CAS: 764659-72-5
Formula: C₁₈H₂₆FN₃O₄S
MW: 399.5 g/mol

In stock

Reference Standard

Emtricitabine Racemic Mixture chemical structure

Emtricitabine Racemic Mixture

CAS: 144371-00-6
Formula: C₈H₁₀FN₃O₃S
MW: 247.25 g/mol

VQ-036977

Reference Standard

Emtricitabine Tenofovir Disoproxil Dimer chemical structure

Emtricitabine Tenofovir Disoproxil Dimer

CAS: 1962114-98-2
Formula: C₂₈H₄₀FN₈O₁₃PS
MW: 778.7 g/mol

VQ-036978

Reference Standard

Emtricitabine Uracil Impurity chemical structure

Emtricitabine Uracil Impurity

CAS: 1422361-25-8
Formula: C₁₈H₂₅FN₂O₅S
MW: 400.5 g/mol

VQ-030467

Reference Standard

Emtrictiabine IP Impurity A chemical structure

Emtrictiabine IP Impurity A

CAS: 1238210-10-0
Formula: C₈H₈FN₃O₄S
MW: 261.23 g/mol

In stock

Reference Standard

Enalapril Diketopiperazine Acid chemical structure

Enalapril Diketopiperazine Acid

CAS: 115623-21-7
Formula: C₁₈H₂₂N₂O₄
MW: 330.4 g/mol

VQ-030474

Reference Standard

Enalapril IPA diacid Impurity

Enalapril IPA diacid Impurity

CAS: 305336-71-4
Formula: C₁₆H₂₃NO₄
MW: 293.36 g/mol

VQ-004881

Reference Standard

Enalaprilat Dihydrate chemical structure

Enalaprilat Dihydrate

CAS: 84680-54-6
Formula: C₁₈H₂₈N₂O₇
MW: 384.4 g/mol

VQ-030472

Reference Standard

Enalaprilat Diketopiperazine Acid Impurity chemical structure

Enalaprilat Diketopiperazine Acid Impurity

CAS: 219677-80-2
Formula: C₁₈H₂₂N₂O₄
MW: 330.4 g/mol

In stock

Reference Standard

Enalaprilat EP Impuriy B (Di-Sodium Salt)

Enalaprilat EP Impuriy B (Di-Sodium Salt)

Formula: C₁₈H₂₂Na₂N₂O₅
MW: 392.36 g/mol

VQ-004883

Reference Standard

Enasidenib Deshydroxy Impurity

Enasidenib Deshydroxy Impurity

CAS: 2772761-40-5
Formula: C₁₉H₁₇F₆N₇
MW: 457.4 g/mol

VQ-048208

Reference Standard

Enclomiphene Hydrochloride chemical structure

Enclomiphene Hydrochloride

CAS: 14158-65-7
Formula: C₂₆H₂₉Cl₂NO
MW: 442.4 g/mol

VQ-036388

Reference Standard

Encorafenib Amino Carbamate Impurity chemical structure

Encorafenib Amino Carbamate Impurity

CAS: 1269440-78-9
Formula: C₂₁H₂₅ClFN₇O₂
MW: 461.9 g/mol

VQ-025540

Reference Standard

Encorafenib Descarbamate Impurity chemical structure

Encorafenib Descarbamate Impurity

CAS: 3047752-81-5
Formula: C₂₀H₂₅ClFN₇O₂S
MW: 482 g/mol

VQ-030481

Reference Standard

Encorafenib Disulfonamide Impurity chemical structure

Encorafenib Disulfonamide Impurity

CAS: 1269440-99-4
Formula: C₂₃H₂₉ClFN₇O₆S₂
MW: 618.1 g/mol

VQ-030480

Reference Standard

Encorafenib R-Isomer chemical structure

Encorafenib R-Isomer

CAS: 1269440-29-0
Formula: C₂₂H₂₇ClFN₇O₄S
MW: 540 g/mol

VQ-022519

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