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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

Clopidogrel Impurity CHOX

Clopidogrel Impurity CHOX

CAS: 1251822-13-5
Formula: C₁₆H₁₃ClNO₂S⁺
MW: 318.79 g/mol

VQ-036408

Reference Standard

Clopidogrel Impurity-37

Clopidogrel Impurity-37

Formula: C₂₈H₂₈Cl₂N₂O₄S
MW: 559.5 g/mol

VQ-004666

Reference Standard

Clopidogrel Oxidative (Impurity-F) chemical structure

Clopidogrel Oxidative (Impurity-F)

CAS: 1030894-82-6
Formula: C₁₆H₁₅ClNO₂S⁺
MW: 320.8 g/mol

VQ-047845

Reference Standard

Clopidogrel Pyridinium Bromide Impurity chemical structure

Clopidogrel Pyridinium Bromide Impurity

CAS: 2418591-12-3
Formula: C₁₆H₁₅BrClNO₂S
MW: 400.7 g/mol

VQ-029882

Reference Standard

Clopidogrel Sulfonated Impurity chemical structure

Clopidogrel Sulfonated Impurity

CAS: 2173294-69-2
Formula: C₁₆H₁₆ClNO₅S₂
MW: 401.9 g/mol

VQ-029886

Reference Standard

Clopidogrel USP Related Compond B (Freebase) chemical structure

Clopidogrel USP Related Compond B (Freebase)

CAS: 144457-43-2
Formula: C₁₆H₁₆ClNO₂S
MW: 321.8 g/mol

VQ-004667

Reference Standard

Clopidogrel USP Related Compond B (Hydrochloride) chemical structure

Clopidogrel USP Related Compond B (Hydrochloride)

CAS: 144750-52-7
Formula: C₁₆H₁₇Cl₂NO₂S
MW: 358.3 g/mol

In stock

Reference Standard

Clotiazepam Impurity 2 chemical structure

Clotiazepam Impurity 2

CAS: 50509-09-6
Formula: C₁₅H₁₅ClN₂O₂S
MW: 322.8 g/mol

VQ-029907

Reference Standard

Cloticasone Propionate chemical structure

Cloticasone Propionate

CAS: 80486-69-7
Formula: C₂₅H₃₁ClF₂O₅S
MW: 517 g/mol

VQ-025881

Reference Standard

Clotrimazole Impurity 12 chemical structure

Clotrimazole Impurity 12

CAS: 59154-29-9
Formula: C₁₉H₁₄Cl₂
MW: 313.2 g/mol

VQ-029910

Reference Standard

Clotrimazole TRAM-34 Impurity chemical structure

Clotrimazole TRAM-34 Impurity

CAS: 289905-88-0
Formula: C₂₂H₁₇ClN₂
MW: 344.8 g/mol

VQ-036424

Reference Standard

Clovin chemical structure

CAS: 81970-00-5
Formula: C₃₃H₄₀O₂₀
MW: 756.7 g/mol

VQ-033707

Reference Standard

Cloxacillin chemical structure

CAS: 61-72-3
Formula: C₁₉H₁₈ClN₃O₅S
MW: 435.9 g/mol

VQ-043123

Reference Standard

Cobamamide chemical structure

CAS: 13870-90-1
Formula: C₇₂H₁₀₀CoN₁₈O₁₇P
MW: 1579.6 g/mol

VQ-025103

Reference Standard

Cobicistat (S,R,S) Isomer

Cobicistat (S,R,S) Isomer

CAS: 3093141-59-1
Formula: C₄₀H₅₃N₇O₅S₂
MW: 776.02 g/mol

VQ-047859

Reference Standard

Cobicistat Impurity 1

Cobicistat Impurity 1

Formula: C₁₇H₂₈N₄O₅S
MW: 400.49 g/mol

In stock

Reference Standard

Cobicistat Impurity 2

Cobicistat Impurity 2

Formula: C₁₃H₂₄N₂O₅
MW: 288.34 g/mol

In stock

Reference Standard

Cobicistat on Colloidal silicon Dioxide Related Compound 7 chemical structure

Cobicistat on Colloidal silicon Dioxide Related Compound 7

CAS: 1004316-56-6
Formula: C₂₈H₃₀N₄O₄S₂
MW: 550.7 g/mol

In stock

Reference Standard

Cobimetinib (racemate) chemical structure

Cobimetinib (racemate)

CAS: 934662-91-6
Formula: C₂₁H₂₁F₃IN₃O₂
MW: 531.3 g/mol

VQ-043741

Reference Standard

Cobimetinib R Isomer chemical structure

Cobimetinib R Isomer

CAS: 934660-94-3
Formula: C₂₁H₂₁F₃IN₃O₂
MW: 531.3 g/mol

VQ-029921

Reference Standard

Cocarboxylase Tetrahydrate chemical structure

Cocarboxylase Tetrahydrate

CAS: 68684-55-9
Formula: C₁₂H₂₆N₄O₁₁P₂S
MW: 496.37 g/mol

VQ-032341

Reference Standard

Coenzyme Q11 chemical structure

CAS: 24663-35-2
Formula: C₆₄H₉₈O₄
MW: 931.5 g/mol

VQ-028572

Reference Standard

Coenzyme Q8 chemical structure

CAS: 2394-68-5
Formula: C₄₉H₇₄O₄
MW: 727.1 g/mol

VQ-035323

Reference Standard

Colchicine Racemic Mixture Impurity chemical structure

Colchicine Racemic Mixture Impurity

CAS: 54192-66-4
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

VQ-029923

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