2-ethynylbenzoic acid
Also known as: 2-ETHYNYL-BENZOIC ACID, o-Ethynylbenzoic acid, Benzoic acid, 2-ethynyl-, RARECHEM AL BE 0922, o-Ethinylbenzoesaeure
2-ethynylbenzoic acid (CAS 33578-00-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H6O2 and a molecular weight of 146.143 g/mol. Key properties include a boiling point of 282.1±23.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 128.4±17.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 33578-00-6
- Jingsj CID
- J-1373833-5
- Molecular Formula
- C9H6O2
- Molecular Weight
- 146.143 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 282.1±23.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 128.4±17.3 °C |
| Exact Mass | 146.036774 |
| PSA | 37.30000 |
| LogP | 2.08 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.592 |
Customs & Trade Information
| HS Code | 2916399090 |
|---|---|
| Summary | 2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-ethynylbenzoic acid?
The CAS number of 2-ethynylbenzoic acid is 33578-00-6.
What are the molecular formula and molecular weight of 2-ethynylbenzoic acid?
2-ethynylbenzoic acid has molecular formula C9H6O2 and molecular weight 146.143 g/mol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-ethynylbenzoic acid (CAS 33578-00-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1373833-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.