1-Hydroxy-7-azabenzotriazole, 98%

Name: 1-Hydroxy-7-azabenzotriazole, 98%
Brand: Vaqora Chemicals
SKU: VQ-002351

About 1-Hydroxy-7-azabenzotriazole, 98%

1-Hydroxy-7-azabenzotriazole is a peptide synthesis reagent (Puriss grade) carrying the CAS registry number 39968-33-7, specified at 98% purity. The compound has the formula C5H4N4O, corresponding to a molecular weight of 136.11 g/mol. Systematically, it is named 3-hydroxytriazolo[4,5-b]pyridine. It is also known as HOAT or 7-Aza-1-hydroxybenzotriazole.

The material typically appears as an off white to pale yellow powder. Literature values give a melting point of 210-214 °C. Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Key uses span peptide coupling, solid-phase peptide synthesis, bioconjugation and pharmaceutical synthesis. Buyers come mainly from academic and industrial research and diagnostics and biotechnology.

Available in 1 g, 5 g, 25 g and 1 kg packs, 1-Hydroxy-7-azabenzotriazole is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Peptide coupling
Solid-phase peptide synthesis
Bioconjugation
Pharmaceutical synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	1-Hydroxy-7-azabenzotriazole, 98%
Catalogue No.	VQ-002351
CAS Number	39968-33-7
IUPAC name	3-hydroxytriazolo[4,5-b]pyridine
Molecular formula	C₅H₄N₄O
Molecular weight	136.11 g/mol
Exact mass	136.0385
Grade	Puriss
Purity / assay	98%
HSN code	29270090
InChIKey	FPIRBHDGWMWJEP-UHFFFAOYSA-N
SMILES	C1=CC2=C(N=C1)N(N=N2)O
PubChem CID	181649

Physical properties
Physical form	Powder
Appearance	Off white to pale yellow powder
Melting point	210-214 °C
LogP (XLogP3)	0.5
H-bond donors / acceptors	1 / 4
TPSA	63.8 Å²
UN number	UN 1993
Synonyms	HOAT, 7-Aza-1-hydroxybenzotriazole, 3H-[1,2,3]triazolo[4,5-b]pyridin-3-ol, 3H-1,2,3-Triazolo[4,5-b]pyridine, 3-hydroxy-, 1-hydroxyl-7-azabenzotriazole, 3H-(1,2,3)triazolo(4,5-b)pyridin-3-ol, HOAT solution, 1,2,3-triazolo[5,4-b]pyridin-3-ol, [1,2,3]Triazolo[4,5-b]pyridin-3-ol, HOAt 1-Hydroxy-7-azabenzotriazole, 3H-1,2,3-triazolo[4,5-b]pyridine-3-ol, 3H-1,2,3-Triazolo(4,5-b)pyridine, 3-hydroxy-

Safety & hazard information (GHS)

Corrosive

Toxic

Harmful / irritant

Signal word: Danger

Hazard statements

H204Fire or projection hazard
H301Toxic if swallowed
H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P210, P230, P234, P236, P240, P250, P261, P264, P264 + P265, P270, P271, P280, P301 + P316, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P305 + P354 + P338, P317, P319, P321, P330, P332 + P317, P337 + P317

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 39968-33-7

AR

1-Hydroxy-7-azabenzotriazole, AR

CAS: 39968-33-7
Formula: C₅H₄N₄O
MW: 136.11 g/mol

VQ-046271

Frequently asked questions

What is the CAS number of 1-Hydroxy-7-azabenzotriazole, 98%?

The CAS Registry Number of 1-Hydroxy-7-azabenzotriazole, 98% is 39968-33-7. It is also known as HOAT, 7-Aza-1-hydroxybenzotriazole, 3H-[1,2,3]triazolo[4,5-b]pyridin-3-ol.

What is the molecular formula and molecular weight of 1-Hydroxy-7-azabenzotriazole, 98%?

1-Hydroxy-7-azabenzotriazole, 98% has the molecular formula C5H4N4O and a molecular weight of 136.11 g/mol. Its IUPAC name is 3-hydroxytriazolo[4,5-b]pyridine.

Which grade and pack sizes of 1-Hydroxy-7-azabenzotriazole, 98% can I order?

We supply 1-Hydroxy-7-azabenzotriazole, 98% in Puriss (98%) grade, in 1 g, 5 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 1-Hydroxy-7-azabenzotriazole, 98%?

Yes. Every lot of 1-Hydroxy-7-azabenzotriazole, 98% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 1-Hydroxy-7-azabenzotriazole, 98% be shipped internationally?

Yes. 1-Hydroxy-7-azabenzotriazole, 98% is classified as hazardous (UN 1993), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.