How many api reference standards do you supply?

We currently list 583 api reference standards, such as Digoxin, Doxepin, Estriol. We can also source or custom-synthesise items that are not listed.

Do api reference standards come with a COA and SDS?

Yes. Each lot is supplied with a batch Certificate of Analysis and a 16-section GHS Safety Data Sheet. Typical COAs can be shared before you order.

Can you export api reference standards to my country?

Yes. We ship worldwide by sea freight, air cargo and express courier, with export documentation, and pack hazardous materials to IATA/IMDG dangerous-goods rules.

Impurities & Reference Standards

API Reference Standards

583 api reference standards with CAS numbers, structures and specifications — batch COA and GHS SDS supplied.

3,436products

377in stock

COA + SDSwith every lot

Reference Standard

Closantel

CAS: 57808-65-8
Formula: C₂₂H₁₄Cl₂I₂N₂O₂
MW: 663.1 g/mol

VQ-029905

Reference Standard

Clothianidin

CAS: 210880-92-5
Formula: C₆H₈ClN₅O₂S
MW: 249.68 g/mol

VQ-029906

Reference Standard

Cloxacillin sodium monohydrate

CAS: 7081-44-9
Formula: C₁₉H₁₉ClN₃NaO₆S
MW: 475.9 g/mol

VQ-019554

Reference Standard

Clozapine

CAS: 5786-21-0
Formula: C₁₈H₁₉ClN₄
MW: 326.8 g/mol

VQ-022249

Reference Standard

Cobicistat

CAS: 1004316-88-4
Formula: C₄₀H₅₃N₇O₅S₂
MW: 776 g/mol

VQ-029915

Reference Standard

Cobimetinib

CAS: 934660-93-2
Formula: C₂₁H₂₁F₃IN₃O₂
MW: 531.3 g/mol

VQ-022255

Reference Standard

Cobimetinib Fumarate

CAS: 1369665-02-0
Formula: C₄₆H₄₆F₆I₂N₆O₈
MW: 1178.7 g/mol

VQ-036435

Reference Standard

Colchicine Hydrochloride

CAS: 34371-48-7
Formula: C₂₂H₂₆ClNO₆
MW: 435.9 g/mol

VQ-044322

Reference Standard

Colesevelam Hydrochloride

CAS: 182815-44-7
Formula: (C₁₃H₂₇N.C₁₂H₂₇N₂.C₃H₇N.C₃H₅ClO.Cl)x.xClH
MW: 581.8 g/mol

VQ-025084

Reference Standard

Colistin

CAS: 1066-17-7
Formula: C₅₂H₉₈N₁₆O₁₃
MW: 1155.4 g/mol

VQ-036439

Reference Standard

Colistin A

CAS: 7722-44-3
Formula: C₅₃H₁₀₀N₁₆O₁₃
MW: 1169.5 g/mol

VQ-036438

Reference Standard

Colistin A sulfate

CAS: 207990-63-4
Formula: C₅₃H₁₀₂N₁₆O₁₇S
MW: 1267.5 g/mol

VQ-047867

Reference Standard

Colistin B

CAS: 7239-48-7
Formula: C₅₂H₉₈N₁₆O₁₃
MW: 1155.4 g/mol

VQ-036440

Reference Standard

Colloidal Bismuth Subcitrate

CAS: 57644-54-9
Formula: C₁₂H₁₀BiK₃O₁₄
MW: 704.47 g/mol

VQ-036441

Reference Standard

Conjugated Estrogens

CAS: 12126-59-9
Formula: C₁₈H₂₁NaO₅S
MW: 372.4 g/mol

VQ-037098

Reference Standard

Contezolid

CAS: 1112968-42-9
Formula: C₁₈H₁₅F₃N₄O₄
MW: 408.3 g/mol

VQ-041962

Reference Standard

Copanlisib

CAS: 1032568-63-0
Formula: C₂₃H₂₈N₈O₄
MW: 480.5 g/mol

VQ-043725

Reference Standard

Copovidone

CAS: 25086-89-9
Formula: NA

VQ-043124

Reference Standard

Cordycepin

CAS: 73-03-0
Formula: C₁₀H₁₃N₅O₃
MW: 251.24 g/mol

VQ-036442

Reference Standard

Coronaridine

CAS: 467-77-6
Formula: C₂₁H₂₆N₂O₂
MW: 338.4 g/mol

VQ-047868

Reference Standard

Cortexolone dipropionate

CAS: 19608-30-1
Formula: C₂₇H₃₈O₆
MW: 458.6 g/mol

VQ-026085

Reference Standard

Corticosterone

CAS: 50-22-6
Formula: C₂₁H₃₀O₄
MW: 346.5 g/mol

VQ-032530

Reference Standard

Cortisone phosphate

CAS: 508-95-2
Formula: C₂₁H₂₉O₈P
MW: 440.4 g/mol

VQ-025086

Reference Standard

Corydaline

CAS: 518-69-4
Formula: C₂₂H₂₇NO₄
MW: 369.5 g/mol

VQ-030803

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API Reference Standards

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