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

Ribostamycin Sulfate

CAS: 53797-35-6
Formula: C₁₇H₃₆N₄O₁₄S
MW: 552.6 g/mol

VQ-033533

Reference Standard

Ridinilazole

CAS: 308362-25-6
Formula: C₂₄H₁₆N₆
MW: 388.4 g/mol

VQ-027797

Reference Standard

Rifabutin

CAS: 72559-06-9
Formula: C₄₆H₆₂N₄O₁₁
MW: 847 g/mol

VQ-027798

Reference Standard

Rifamycin

CAS: 6998-60-3
Formula: C₃₇H₄₇NO₁₂
MW: 697.8 g/mol

VQ-033538

Reference Standard

Rifaximin

CAS: 80621-81-4
Formula: C₄₃H₅₁N₃O₁₁
MW: 785.9 g/mol

In stock

Reference Standard

Rilmenidine

CAS: 54187-04-1
Formula: C₁₀H₁₆N₂O
MW: 180.25 g/mol

VQ-033541

Reference Standard

Rilmenidine Dihydrogen Phosphate

CAS: 85409-38-7
Formula: C₁₀H₁₉N₂O₅P
MW: 278.24 g/mol

VQ-041906

Reference Standard

Rilpivirine

CAS: 500287-72-9
Formula: C₂₂H₁₈N₆
MW: 366.4 g/mol

VQ-007715

Reference Standard

Rilpivirine Hydrochloride

CAS: 700361-47-3
Formula: C₂₂H₁₉ClN₆
MW: 402.9 g/mol

In stock

Reference Standard

Riluzole HydroChloride

CAS: 850608-87-6
Formula: C₈H₆ClF₃N₂OS
MW: 270.66 g/mol

VQ-007717

Reference Standard

Riluzole WS

CAS: 1744-22-5
Formula: C₈H₅F₃N₂OS
MW: 234.2 g/mol

In stock

Reference Standard

Rimantadine Hydrochloride

CAS: 1501-84-4
Formula: C₁₂H₂₂ClN
MW: 215.76 g/mol

VQ-023636

Reference Standard

Rimegepant

CAS: 1289023-67-1
Formula: C₂₈H₂₈F₂N₆O₃
MW: 534.6 g/mol

VQ-027824

Reference Standard

Rimsulfuron

CAS: 122931-48-0
Formula: C₁₄H₁₇N₅O₇S₂
MW: 431.4 g/mol

VQ-041919

Reference Standard

Riociguat

CAS: 625115-55-1
Formula: C₂₀H₁₉FN₈O₂
MW: 422.4 g/mol

VQ-007719

Reference Standard

Ripasudil

CAS: 223645-67-8
Formula: C₁₅H₁₈FN₃O₂S
MW: 323.4 g/mol

VQ-041926

Reference Standard

Ripretinib

CAS: 1442472-39-0
Formula: C₂₄H₂₁BrFN₅O₂
MW: 510.4 g/mol

VQ-027832

Reference Standard

Risdiplam

CAS: 1825352-65-5
Formula: C₂₂H₂₃N₇O
MW: 401.5 g/mol

In stock

Reference Standard

Risedronate Sodium Hemipentahydrate

CAS: 329003-65-8
Formula: C₁₄H₃₀N₂Na₂O₁₉P₄
MW: 700.26 g/mol

VQ-033564

Reference Standard

Risedronic acid

CAS: 105462-24-6
Formula: C₇H₁₁NO₇P₂
MW: 283.11 g/mol

VQ-023646

Reference Standard

Risperidone

CAS: 106266-06-2
Formula: C₂₃H₂₇FN₄O₂
MW: 410.5 g/mol

In stock

Reference Standard

Ritlecitinib

CAS: 1792180-81-4
Formula: C₁₅H₁₉N₅O
MW: 285.34 g/mol

In stock

Reference Standard

Ritlecitinib Tosylate

CAS: 2192215-81-7
Formula: C₂₂H₂₇N₅O₄S
MW: 457.5 g/mol

In stock

Reference Standard

Ritonavir

CAS: 155213-67-5
Formula: C₃₇H₄₈N₆O₅S₂
MW: 720.9 g/mol

VQ-023648

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API Reference Standards

Need a price, a spec or a custom compound?