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

Estradiol Enanthate

CAS: 4956-37-0
Formula: C₂₅H₃₆O₃
MW: 384.6 g/mol

VQ-037122

Reference Standard

Estradiol Hemihydrate

CAS: 35380-71-3
Formula: C₃₆H₅₀O₅
MW: 562.8 g/mol

VQ-030568

Reference Standard

Estramustine

CAS: 2998-57-4
Formula: C₂₃H₃₁Cl₂NO₃
MW: 440.4 g/mol

VQ-048272

Reference Standard

Estramustine Disodium Phosphate

CAS: 52205-73-9
Formula: C₂₃H₃₀Cl₂NNa₂O₆P
MW: 564.3 g/mol

VQ-048273

Reference Standard

Estriol

CAS: 50-27-1
Formula: C₁₈H₂₄O₃
MW: 288.4 g/mol

In stock

Reference Standard

Estrone Sodium Sulfate

CAS: 438-67-5
Formula: C₁₈H₂₁NaO₅S
MW: 372.4 g/mol

VQ-025630

Reference Standard

Estrone Sulfate

CAS: 481-97-0
Formula: C₁₈H₂₂O₅S
MW: 350.4 g/mol

VQ-037107

Reference Standard

Estropipate

CAS: 7280-37-7
Formula: C₂₂H₃₂N₂O₅S
MW: 436.6 g/mol

VQ-048282

Reference Standard

Etamsylate

CAS: 2624-44-4
Formula: C₁₀H₁₇NO₅S
MW: 263.31 g/mol

VQ-025637

Reference Standard

Etelcalcetide

CAS: 1262780-97-1
Formula: C₃₈H₇₃N₂₁O₁₀S₂
MW: 1048.3 g/mol

VQ-025631

Reference Standard

Etelcalcetide Hydrochloride

CAS: 1334237-71-6
Formula: C₃₈H₇₄ClN₂₁O₁₀S₂
MW: 1084.7 g/mol

VQ-037112

Reference Standard

Ethacizine Hydrochloride

CAS: 57530-40-2
Formula: C₂₂H₂₈ClN₃O₃S
MW: 450 g/mol

VQ-037114

Reference Standard

Ethacrynate sodium

CAS: 6500-81-8
Formula: C₁₃H₁₁Cl₂NaO₄
MW: 325.12 g/mol

VQ-048286

Reference Standard

Ethacrynic Acid

CAS: 58-54-8
Formula: C₁₃H₁₂Cl₂O₄
MW: 303.13 g/mol

VQ-025632

Reference Standard

Ethanol

CAS: 64-17-5
Formula: C₂H₆O
MW: 46.07 g/mol

VQ-038942

Reference Standard

Ethion dioxon

CAS: 22756-17-8
Formula: C₉H₂₂O₆P₂S₂
MW: 352.3 g/mol

VQ-040888

Reference Standard

Ethionamide

CAS: 536-33-4
Formula: C₈H₁₀N₂S
MW: 166.25 g/mol

VQ-025650

Reference Standard

Ethiprole

CAS: 181587-01-9
Formula: C₁₃H₉Cl₂F₃N₄OS
MW: 397.2 g/mol

VQ-039658

Reference Standard

Ethisterone

CAS: 434-03-7
Formula: C₂₁H₂₈O₂
MW: 312.4 g/mol

VQ-030607

Reference Standard

Ethofumesate

CAS: 26225-79-6
Formula: C₁₃H₁₈O₅S
MW: 286.35 g/mol

VQ-040790

Reference Standard

Ethopabate

CAS: 59-06-3
Formula: C₁₂H₁₅NO₄
MW: 237.25 g/mol

VQ-030608

Reference Standard

Ethopropazine

CAS: 522-00-9
Formula: C₁₉H₂₄N₂S
MW: 312.5 g/mol

VQ-048303

Reference Standard

Ethoprophos

CAS: 13194-48-4
Formula: C₈H₁₉O₂PS₂
MW: 242.3 g/mol

VQ-037139

Reference Standard

Ethosuximide

CAS: 77-67-8
Formula: C₇H₁₁NO₂
MW: 141.17 g/mol

VQ-025656

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API Reference Standards

Need a price, a spec or a custom compound?