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

Lefamulin

CAS: 1061337-51-6
Formula: C₂₈H₄₅NO₅S
MW: 507.7 g/mol

VQ-048813

Reference Standard

Lefamulin acetate

CAS: 1350636-82-6
Formula: C₃₀H₄₉NO₇S
MW: 567.8 g/mol

VQ-048776

Reference Standard

Leflunomide

CAS: 75706-12-6
Formula: C₁₂H₉F₃N₂O₂
MW: 270.21 g/mol

VQ-022937

Reference Standard

Lemborexant

CAS: 1369764-02-2
Formula: C₂₂H₂₀F₂N₄O₂
MW: 410.4 g/mol

VQ-037923

Reference Standard

Lenacapavir

CAS: 2189684-44-2
Formula: C₃₉H₃₂ClF₁₀N₇O₅S₂
MW: 968.3 g/mol

VQ-031470

Reference Standard

Lenacapavir Sodium

CAS: 2283356-12-5
Formula: C₃₉H₃₁ClF₁₀N₇NaO₅S₂
MW: 990.3 g/mol

VQ-037928

Reference Standard

Lenalidomide Hemihydrate

CAS: 847871-99-2
Formula: C₂₆H₂₈N₆O₇
MW: 536.5 g/mol

VQ-007531

Reference Standard

Lenalidomide Hydrochloride

CAS: 1243329-97-6
Formula: C₁₃H₁₄ClN₃O₃
MW: 295.72 g/mol

VQ-045088

Reference Standard

Lenalidomide WS

CAS: 191732-72-6
Formula: C₁₃H₁₃N₃O₃
MW: 259.26 g/mol

In stock

Reference Standard

Lenvatinib

CAS: 417716-92-8
Formula: C₂₁H₁₉ClN₄O₄
MW: 426.9 g/mol

In stock

Reference Standard

Lenvatinib Mesylate

CAS: 857890-39-2
Formula: C₂₂H₂₃ClN₄O₇S
MW: 523 g/mol

In stock

Reference Standard

Lercanidipine

CAS: 100427-26-7
Formula: C₃₆H₄₁N₃O₆
MW: 611.7 g/mol

VQ-007535

Reference Standard

Lercanidipine Hydrochloride Hydrate

CAS: 932391-49-6
Formula: C₃₆H₄₁N₃O₆.ClH.1/2H₂O
MW: 657.2 g/mol

In stock

Reference Standard

Lesinurad

CAS: 878672-00-5
Formula: C₁₇H₁₄BrN₃O₂S
MW: 404.3 g/mol

VQ-037960

Reference Standard

Letermovir

CAS: 917389-32-3
Formula: C₂₉H₂₈F₄N₄O₄
MW: 572.5 g/mol

In stock

Reference Standard

Letosteine

CAS: 53943-88-7
Formula: C₁₀H₁₇NO₄S₂
MW: 279.4 g/mol

VQ-037964

Reference Standard

Leucomycin

CAS: 1392-21-8
Formula: C₃₅H₅₉NO₁₃
MW: 701.8 g/mol

VQ-038833

Reference Standard

Leucomycin Tartrate

CAS: 37280-56-1
Formula: C₄₀H₆₇NO₁₈
MW: 850 g/mol

VQ-040640

Reference Standard

Leuprolide mesylate

CAS: 944347-41-5
Formula: C₆₀H₈₈N₁₆O₁₅S
MW: 1305.5 g/mol

VQ-037968

Reference Standard

Leuprorelin

CAS: 53714-56-0
Formula: C₅₉H₈₄N₁₆O₁₂
MW: 1209.4 g/mol

VQ-031503

Reference Standard

Leuprorelin Acetate

CAS: 74381-53-6
Formula: C₆₁H₈₈N₁₆O₁₄
MW: 1269.4 g/mol

VQ-031502

Reference Standard

Levalbuterol Hydrochloride

CAS: 50293-90-8
Formula: C₁₃H₂₂ClNO₃
MW: 275.77 g/mol

VQ-031505

Reference Standard

Levalbuterol sulphate

CAS: 148563-16-0
Formula: C₂₆H₄₄N₂O₁₀S
MW: 576.7 g/mol

VQ-031506

Reference Standard

Levalbuterol tartrate

CAS: 661464-94-4
Formula: C₃₀H₄₈N₂O₁₂
MW: 628.7 g/mol

VQ-037972

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API Reference Standards

Need a price, a spec or a custom compound?