Dehydroacetic acid
Also known as: 2-Acetyl-5-hydroxy-3-oxo-4-hexenoic acid δ-lactone, 2H-Pyran-2,4(3H)-dione, 3-acetyl-6-methyl-, 3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione, 3-acetyl-6-methyl-(2H)-pyran-2,4(3H)dione, DEHYDRACETIC ACID, DEHYDRACETSAEURE, DEHYDRANONE, DHA, Geogard(R) 111A, Geogard(R) 221, Geogard(R) 361, Methylacetopyronone, dehydro-aceticaci, dhaa, Dehydracetic acid
Dehydroacetic acid (CAS 520-45-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H8O4 and a molecular weight of 168.147 g/mol. Key properties include a melting point of 111-113 °C(lit.), a boiling point of 332.6±42.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 150.5±27.9 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 520-45-6
- Jingsj CID
- J-15130-4
- Molecular Formula
- C8H8O4
- Molecular Weight
- 168.147 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 111-113 °C(lit.) |
|---|---|
| Boiling Point | 332.6±42.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 150.5±27.9 °C |
| Exact Mass | 168.042252 |
| PSA | 60.44000 |
| LogP | 0.35 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.490 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen 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 Dehydroacetic acid?
The CAS number of Dehydroacetic acid is 520-45-6.
What are the molecular formula and molecular weight of Dehydroacetic acid?
Dehydroacetic acid has molecular formula C8H8O4 and molecular weight 168.147 g/mol.
Is Dehydroacetic acid hazardous?
Dehydroacetic acid has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.
What are the upstream and downstream products of Dehydroacetic acid?
For Dehydroacetic acid, Upstream Products: 2,2,6-Trimethyl-4H-1,3-dioxin-4-one, Ethyl acetoacetate, Diketene; Downstream Products: 4-Bromo-2,6-dimethylpyridine, 3-Methyl-3-pyrazolin-5-one, 2,4-Dihydroxy-6-methylpyridine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Dehydroacetic acid (CAS 520-45-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-15130-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.