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

Tulobuterol

CAS: 41570-61-0
Formula: C₁₂H₁₈ClNO
MW: 227.73 g/mol

VQ-034477

Reference Standard

Tulobuterol Hydrochloride

CAS: 56776-01-3
Formula: C₁₂H₁₉Cl₂NO
MW: 264.19 g/mol

VQ-028569

Reference Standard

Tylosin

CAS: 1401-69-0
Formula: C₄₆H₇₇NO₁₇
MW: 916.1 g/mol

VQ-034478

Reference Standard

Tylosin Phosphate

CAS: 1405-53-4
Formula: C₄₆H₈₀NO₂₁P
MW: 1014.1 g/mol

VQ-042740

Reference Standard

Tylosin Tartrate

CAS: 1405-54-5
Formula: C₅₀H₈₃NO₂₃
MW: 1066.2 g/mol

VQ-042739

Reference Standard

Tylvalosin

CAS: 63409-12-1
Formula: C₅₃H₈₇NO₁₉
MW: 1042.3 g/mol

VQ-042743

Reference Standard

Tyrothricin

CAS: 1404-88-2
Formula: C₆₅H₈₅N₁₁O₁₃
MW: 1228.4 g/mol

VQ-034480

Reference Standard

Ubiquinol

CAS: 992-78-9
Formula: C₅₉H₉₂O₄
MW: 865.4 g/mol

VQ-032366

Reference Standard

Ubrogepant

CAS: 1374248-77-7
Formula: C₂₉H₂₆F₃N₅O₃
MW: 549.5 g/mol

VQ-028573

Reference Standard

Udenafil

CAS: 268203-93-6
Formula: C₂₅H₃₆N₆O₄S
MW: 516.7 g/mol

VQ-042748

Reference Standard

Ulifloxacin

CAS: 112984-60-8
Formula: C₁₆H₁₆FN₃O₃S
MW: 349.4 g/mol

VQ-042749

Reference Standard

Ulinastatin

CAS: 80449-31-6
Formula: C₁₃H₁₆O₃
MW: 220.26 g/mol

VQ-042750

Reference Standard

Ulipristal

CAS: 159811-51-5
Formula: C₂₈H₃₅NO₃
MW: 433.6 g/mol

VQ-034485

Reference Standard

Ulipristal Acetate

CAS: 126784-99-4
Formula: C₃₀H₃₇NO₄
MW: 475.6 g/mol

VQ-034482

Reference Standard

Ultramark 1621

CAS: 105809-15-2
Formula: C₆H₁₈N₃P₃
MW: 231.19 g/mol

VQ-039061

Reference Standard

Umckalin

CAS: 43053-62-9
Formula: C₁₁H₁₀O₅
MW: 222.19 g/mol

VQ-032348

Reference Standard

Umeclidinium Bromide

CAS: 869113-09-7
Formula: C₂₉H₃₄BrNO₂
MW: 508.5 g/mol

VQ-023946

Reference Standard

Umifenovir

CAS: 131707-25-0
Formula: C₂₂H₂₅BrN₂O₃S
MW: 477.4 g/mol

VQ-023949

Reference Standard

Unii-4370DF050B

CAS: 100403-19-8
Formula: C₃₆H₇₁NO₄
MW: 582 g/mol

VQ-032482

Reference Standard

Upadacitinib Hydrate

CAS: 2050057-56-0
Formula: C₃₄H₄₀F₆N₁₂O₃
MW: 778.8 g/mol

VQ-007826

Reference Standard

Upadacitinib WS

CAS: 1310726-60-3
Formula: C₁₇H₁₉F₃N₆O
MW: 380.4 g/mol

In stock

Reference Standard

Urapidil

CAS: 34661-75-1
Formula: C₂₀H₂₉N₅O₃
MW: 387.5 g/mol

VQ-028589

Reference Standard

Urapidil Hydrochloride

CAS: 64887-14-5
Formula: C₂₀H₃₀ClN₅O₃
MW: 423.9 g/mol

VQ-042757

Reference Standard

Uridine triacetate

CAS: 4105-38-8
Formula: C₁₅H₁₈N₂O₉
MW: 370.31 g/mol

VQ-042764

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API Reference Standards

Need a price, a spec or a custom compound?