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

Sulfinpyrazone

CAS: 57-96-5
Formula: C₂₃H₂₀N₂O₃S
MW: 404.5 g/mol

VQ-042313

Reference Standard

Sulfisoxazole

CAS: 127-69-5
Formula: C₁₁H₁₃N₃O₃S
MW: 267.31 g/mol

VQ-043309

Reference Standard

Sulfoaildenafil

CAS: 856190-47-1
Formula: C₂₃H₃₂N₆O₃S₂
MW: 504.7 g/mol

VQ-042314

Reference Standard

Sulfociprofloxacin

CAS: 105093-21-8
Formula: C₁₇H₁₈FN₃O₆S
MW: 411.4 g/mol

VQ-036341

Reference Standard

Sulpiride

CAS: 15676-16-1
Formula: C₁₅H₂₃N₃O₄S
MW: 341.4 g/mol

VQ-023816

Reference Standard

Sultamicillin

CAS: 76497-13-7
Formula: C₂₅H₃₀N₄O₉S₂
MW: 594.7 g/mol

VQ-045176

Reference Standard

Sultamicillin Tosylate

CAS: 83105-70-8
Formula: C₃₂H₃₈N₄O₁₂S₃
MW: 766.9 g/mol

VQ-033986

Reference Standard

Sumatriptan Succinate

CAS: 103628-48-4
Formula: C₁₈H₂₇N₃O₆S
MW: 413.5 g/mol

VQ-028152

Reference Standard

Sumatriptan WS

CAS: 103628-46-2
Formula: C₁₄H₂₁N₃O₂S
MW: 295.4 g/mol

In stock

Reference Standard

Sunitinib

CAS: 557795-19-4
Formula: C₂₂H₂₇FN₄O₂
MW: 398.5 g/mol

VQ-007769

Reference Standard

Sunitinib Malate WS

CAS: 341031-54-7
Formula: C₂₆H₃₃FN₄O₇
MW: 532.6 g/mol

In stock

Reference Standard

Suplatast Tosilate

CAS: 94055-76-2
Formula: C₂₃H₃₃NO₇S₂
MW: 499.6 g/mol

VQ-042320

Reference Standard

Suprofen

CAS: 40828-46-4
Formula: C₁₄H₁₂O₃S
MW: 260.31 g/mol

VQ-039096

Reference Standard

Suvorexant WS

CAS: 1030377-33-3
Formula: C₂₃H₂₃ClN₆O₂
MW: 450.9 g/mol

In stock

Reference Standard

Suxibuzone

CAS: 27470-51-5
Formula: C₂₄H₂₆N₂O₆
MW: 438.5 g/mol

VQ-042327

Reference Standard

Suzetrigine

CAS: 2649467-58-1
Formula: C₂₁H₂₀F₅N₃O₄
MW: 473.4 g/mol

VQ-028158

Reference Standard

Swertiamarin

CAS: 17388-39-5
Formula: C₁₆H₂₂O₁₀
MW: 374.34 g/mol

VQ-040507

Reference Standard

Syringin

CAS: 118-34-3
Formula: C₁₇H₂₄O₉
MW: 372.4 g/mol

VQ-039410

Reference Standard

T-2 Toxin

CAS: 21259-20-1
Formula: C₂₄H₃₄O₉
MW: 466.5 g/mol

VQ-039073

Reference Standard

Tacrine Hydrochloride Monohydrate

CAS: 206658-92-6
Formula: C₁₃H₁₇ClN₂O
MW: 252.74 g/mol

VQ-041097

Reference Standard

Tacrolimus

CAS: 104987-11-3
Formula: C₄₄H₆₉NO₁₂
MW: 804 g/mol

In stock

Reference Standard

Tacrolimus Monohydrate

CAS: 109581-93-3
Formula: C₄₄H₇₁NO₁₃
MW: 822 g/mol

VQ-028163

Reference Standard

Tadalafil

CAS: 171596-29-5
Formula: C₂₂H₁₉N₃O₄
MW: 389.4 g/mol

In stock

Reference Standard

Tafamidis

CAS: 594839-88-0
Formula: C₁₄H₇Cl₂NO₃
MW: 308.1 g/mol

In stock

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API Reference Standards

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