Thioacetic acid
Also known as: Thiolacetic acid, Ethanethioic S-acid, Ethanethiolic acid, Thiacetic acid, Methanecarbothioic acid, Acetylthiol, Usaf EK-P-737, thionoacetic acid, ethanethioic acid
Thioacetic acid (CAS 507-09-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C2H4OS and a molecular weight of 76.118 g/mol. Key properties include a melting point of -17 °C, a boiling point of 93.0±0.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 11.1±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H301 — Toxic if swallowed and H317 — May cause an allergic skin reaction. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 507-09-5
- Jingsj CID
- J-1347608-9
- Molecular Formula
- C2H4OS
- Molecular Weight
- 76.118 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -17 °C |
|---|---|
| Boiling Point | 93.0±0.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 11.1±0.0 °C |
| Exact Mass | 75.998283 |
| PSA | 55.87000 |
| LogP | 0.10 |
| Vapor Pressure | 50.4±0.1 mmHg at 25°C |
| Refractive Index | 1.442 |
| Additional Property | 27 g/L (15 ºC) (hydrolyse) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H301 — Toxic if swallowed
- H317 — May cause an allergic skin reaction
- H318 — Causes serious eye damage
Customs & Trade Information
| HS Code | 2930909090 |
|---|---|
| Summary | 2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Thioacetic acid?
The CAS number of Thioacetic acid is 507-09-5.
What are the molecular formula and molecular weight of Thioacetic acid?
Thioacetic acid has molecular formula C2H4OS and molecular weight 76.118 g/mol.
Is Thioacetic acid hazardous?
Thioacetic acid has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H301 — Toxic if swallowed; H317 — May cause an allergic skin reaction.
What are the upstream and downstream products of Thioacetic acid?
For Thioacetic acid, Upstream Products: acetic acid, Acetyl chloride, ketene; Downstream Products: 1-Mercapto-2-propanol, DL-Penicillamine, Acetyl sulfide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Thioacetic acid (CAS 507-09-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1347608-9 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.