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

Sulfacetamide Sodium Monohydrate

CAS: 6209-17-2
Formula: C₈H₁₁N₂NaO₄S
MW: 254.24 g/mol

VQ-019525

Reference Standard

Sulfacetamide Sodium Salt

CAS: 127-56-0
Formula: C₈H₉N₂NaO₃S
MW: 236.23 g/mol

VQ-042291

Reference Standard

Sulfachloropyrazine sodium monohydrate

CAS: 1392129-96-2
Formula: C₁₀H₁₀ClN₄NaO₃S
MW: 324.72 g/mol

VQ-039825

Reference Standard

Sulfachloropyridazine

CAS: 80-32-0
Formula: C₁₀H₉ClN₄O₂S
MW: 284.72 g/mol

VQ-032379

Reference Standard

Sulfachlorpyridazine Sodium

CAS: 23282-55-5
Formula: C₁₀H₈ClN₄NaO₂S
MW: 306.7 g/mol

VQ-042292

Reference Standard

Sulfadimethoxine

CAS: 122-11-2
Formula: C₁₂H₁₄N₄O₄S
MW: 310.33 g/mol

VQ-028139

Reference Standard

Sulfadimethoxine Sodium

CAS: 1037-50-9
Formula: C₁₂H₁₃N₄NaO₄S
MW: 332.31 g/mol

VQ-042294

Reference Standard

Sulfadimidine Sodium

CAS: 1981-58-4
Formula: C₁₂H₁₃N₄NaO₂S
MW: 300.31 g/mol

VQ-042302

Reference Standard

Sulfaethoxypyridazine

CAS: 963-14-4
Formula: C₁₂H₁₄N₄O₃S
MW: 294.33 g/mol

VQ-042300

Reference Standard

Sulfaguanidine monohydrate

CAS: 6190-55-2
Formula: C₇H₁₂N₄O₃S
MW: 232.26 g/mol

VQ-042301

Reference Standard

Sulfameter

CAS: 651-06-9
Formula: C₁₁H₁₂N₄O₃S
MW: 280.31 g/mol

VQ-039876

Reference Standard

Sulfamethizole

CAS: 144-82-1
Formula: C₉H₁₀N₄O₂S₂
MW: 270.3 g/mol

VQ-033978

Reference Standard

Sulfamethoxypyrazine

CAS: 152-47-6
Formula: C₁₁H₁₂N₄O₃S
MW: 280.31 g/mol

VQ-033977

Reference Standard

Sulfamethoxypyridazine

CAS: 80-35-3
Formula: C₁₁H₁₂N₄O₃S
MW: 280.31 g/mol

VQ-033980

Reference Standard

Sulfametomidine

CAS: 3772-76-7
Formula: C₁₂H₁₄N₄O₃S
MW: 294.33 g/mol

VQ-033974

Reference Standard

Sulfamonomethoxine

CAS: 1220-83-3
Formula: C₁₁H₁₂N₄O₃S
MW: 280.31 g/mol

VQ-042295

Reference Standard

Sulfamoxole

CAS: 729-99-7
Formula: C₁₁H₁₃N₃O₃S
MW: 267.31 g/mol

VQ-042307

Reference Standard

Sulfaphenazole

CAS: 526-08-9
Formula: C₁₅H₁₄N₄O₂S
MW: 314.4 g/mol

VQ-033981

Reference Standard

Sulfaquinoxaline

CAS: 59-40-5
Formula: C₁₄H₁₂N₄O₂S
MW: 300.34 g/mol

VQ-033982

Reference Standard

Sulfaquinoxaline sodium

CAS: 967-80-6
Formula: C₁₄H₁₁N₄NaO₂S
MW: 322.32 g/mol

VQ-042309

Reference Standard

Sulfasalazine

CAS: 599-79-1
Formula: C₁₈H₁₄N₄O₅S
MW: 398.4 g/mol

VQ-023808

Reference Standard

Sulfathiazole

CAS: 72-14-0
Formula: C₉H₉N₃O₂S₂
MW: 255.3 g/mol

VQ-033984

Reference Standard

Sulfatroxazole

CAS: 23256-23-7
Formula: C₁₁H₁₃N₃O₃S
MW: 267.31 g/mol

VQ-042312

Reference Standard

Sulfentrazone

CAS: 122836-35-5
Formula: C₁₁H₁₀Cl₂F₂N₄O₃S
MW: 387.2 g/mol

VQ-007767

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API Reference Standards

Need a price, a spec or a custom compound?