1-Hydroxy-7-azabenzotriazole
Also known as: HOAt, 3H-[1,2,3]Triazolo[4,5-b]pyridin-3-ol, 3H-1,2,3-Triazolo[4,5-b]pyridin-3-ol, 7-Aza-1-hydroxybenzotriazole, N-Hydroxy-7-azabenzotriazole, N-Hydroxy-7-azobenzotriazole, 3-hydroxytriazolo[4,5-b]pyridine, MFCD00210053
1-Hydroxy-7-azabenzotriazole (CAS 39968-33-7) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H4N4O and a molecular weight of 136.111 g/mol. Key properties include a melting point of 213-216°C, a boiling point of 376.8±34.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 181.7±25.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 39968-33-7
- Jingsj CID
- J-30577-1
- Molecular Formula
- C5H4N4O
- Molecular Weight
- 136.111 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 213-216°C |
|---|---|
| Boiling Point | 376.8±34.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 181.7±25.7 °C |
| Exact Mass | 136.038513 |
| PSA | 63.83000 |
| LogP | -0.68 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.836 |
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 1-Hydroxy-7-azabenzotriazole?
The CAS number of 1-Hydroxy-7-azabenzotriazole is 39968-33-7.
What are the molecular formula and molecular weight of 1-Hydroxy-7-azabenzotriazole?
1-Hydroxy-7-azabenzotriazole has molecular formula C5H4N4O and molecular weight 136.111 g/mol.
What are the upstream and downstream products of 1-Hydroxy-7-azabenzotriazole?
For 1-Hydroxy-7-azabenzotriazole, Upstream Products: Boc-Glycine, 4-Aminophenylboronic acid pinacol ester, 3-Methoxy-2-nitropyridine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-Hydroxy-7-azabenzotriazole (CAS 39968-33-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30577-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.