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

Sildenafil Citrate

CAS: 171599-83-0
Formula: C₂₈H₃₈N₆O₁₁S
MW: 666.7 g/mol

In stock

Reference Standard

Silodosin

CAS: 160970-54-7
Formula: C₂₅H₃₂F₃N₃O₄
MW: 495.5 g/mol

VQ-028026

Reference Standard

Silybin

CAS: 36804-17-8
Formula: C₂₅H₂₂O₁₀
MW: 482.4 g/mol

VQ-039080

Reference Standard

Simazine

CAS: 122-34-9
Formula: C₇H₁₂ClN₅
MW: 201.66 g/mol

VQ-039528

Reference Standard

Simethicone

CAS: 8050-81-5
Formula: C₆H₁₈O₄Si₃
MW: 238.46 g/mol

VQ-028031

Reference Standard

Sincalide

CAS: 25126-32-3
Formula: C₄₉H₆₂N₁₀O₁₆S₃
MW: 1143.3 g/mol

VQ-044915

Reference Standard

Sinensetin

CAS: 2306-27-6
Formula: C₂₀H₂₀O₇
MW: 372.4 g/mol

VQ-037165

Reference Standard

Siponimod Hemifumarate

CAS: 1234627-85-0
Formula: C₆₂H₇₄F₆N₄O₁₀
MW: 1149.3 g/mol

VQ-007755

Reference Standard

Siponimod WS

CAS: 1230487-00-9
Formula: C₂₉H₃₅F₃N₂O₃
MW: 516.6 g/mol

In stock

Reference Standard

Sisomicin Sulphate

CAS: 53179-09-2
Formula: C₃₈H₈₄N₁₀O₃₄S₅
MW: 1385.5 g/mol

VQ-028049

Reference Standard

Sitafloxacin Sesquihydrate

CAS: 163253-35-8
Formula: C₁₉H₁₈ClF₂N₃O₃
MW: 409.8 g/mol

VQ-042193

Reference Standard

Sitagliptin Hydrochloride

CAS: 486459-71-6
Formula: C₁₆H₁₆ClF₆N₅O
MW: 443.77 g/mol

In stock

Reference Standard

Sitagliptin Hydrochloride Hydrate

CAS: 862156-92-1
Formula: C₁₆H₁₈ClF₆N₅O₂
MW: 461.79 g/mol

In stock

Reference Standard

Sitagliptin Phosphate

CAS: 654671-78-0
Formula: C₁₆H₂₀F₆N₅O₆P
MW: 523.32 g/mol

In stock

Reference Standard

Sitagliptin phosphate (Monohydrate)

CAS: 654671-77-9
Formula: C₁₆H₂₀F₆N₅O₆P
MW: 523.32 g/mol

VQ-028050

Reference Standard

Sitagliptin WS

CAS: 486460-32-6
Formula: C₁₆H₁₅F₆N₅O
MW: 407.31 g/mol

In stock

Reference Standard

Sitostanol

CAS: 83-45-4
Formula: C₂₉H₅₂O
MW: 416.7 g/mol

VQ-042270

Reference Standard

Sitravatinib(MGCD 516)

CAS: 1123837-84-2
Formula: C₃₃H₂₉F₂N₅O₄S
MW: 629.7 g/mol

VQ-043891

Reference Standard

Sobrerol

CAS: 498-71-5
Formula: C₁₀H₁₈O₂
MW: 170.25 g/mol

VQ-032837

Reference Standard

Sodium Calcium Edetate Hydrate

CAS: 23411-34-9
Formula: C₁₀H₁₆CaN₂Na₂O₁₀
MW: 410.3 g/mol

VQ-036872

Reference Standard

Sodium Creatine Phosphate

CAS: 71519-72-7
Formula: C₄H₁₆N₃Na₂O₉P
MW: 327.14 g/mol

VQ-040572

Reference Standard

Sodium Nafcillin Monohydrate

CAS: 7177-50-6
Formula: C₂₁H₂₃N₂NaO₆S
MW: 454.5 g/mol

VQ-032049

Reference Standard

Sodium Phenylbutyrate

CAS: 1716-12-7
Formula: C₁₀H₁₁NaO₂
MW: 186.18 g/mol

VQ-027130

Reference Standard

Sodium Picosulfate Hydrate

CAS: 1307301-38-7
Formula: C₁₈H₁₃NNa₂O₈S₂
MW: 481.4 g/mol

VQ-033893

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API Reference Standards

Need a price, a spec or a custom compound?