Dehydroascorbic acid
Also known as: L-Dehydroascorbic acid, L-threo-2,3-Hexodiulosonic acid γ-lactone, Oxidized ascorbic acid, Oxidized vitamin C, DHAA, Dehydro-L-ascorbic acid, L-Ascorbic acid, oxidized, (5R)-5-[(1S)-1,2-dihydroxyethyl]furan-2,3,4(5H)-trione
Dehydroascorbic acid (CAS 490-83-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H6O6 and a molecular weight of 174.108 g/mol. Key properties include a melting point of 228 °C (dec.)(lit.), a boiling point of 389.3±38.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 170.0±20.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 490-83-5
- Jingsj CID
- J-1993594-5
- Molecular Formula
- C6H6O6
- Molecular Weight
- 174.108 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 228 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 389.3±38.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 170.0±20.3 °C |
| Exact Mass | 174.016434 |
| PSA | 100.90000 |
| LogP | -2.32 |
| Vapor Pressure | 0.0±2.0 mmHg at 25°C |
| Refractive Index | 1.570 |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Huang J, et al. Dehydroascorbic acid, a blood-brain barrier transportable form of vitamin C, mediates potentcerebroprotection in experimental stroke. Proc Natl Acad Sci U S A. 2001 Sep 25;98(20):11720-4. |
Frequently Asked Questions
What is the CAS number of Dehydroascorbic acid?
The CAS number of Dehydroascorbic acid is 490-83-5.
What are the molecular formula and molecular weight of Dehydroascorbic acid?
Dehydroascorbic acid has molecular formula C6H6O6 and molecular weight 174.108 g/mol.
What are the upstream and downstream products of Dehydroascorbic acid?
For Dehydroascorbic acid, Upstream Products: L-Ascorbic acid, Water, 2,6-dichlorophenolindophenol; Downstream Products: L-Ascorbic acid, 2-Furoic acid, 3,4-Dihydroxy-5-methylfuran-2(5H)-one.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Dehydroascorbic acid (CAS 490-83-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993594-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.