3-Hydroxy-3-methylbutanoic acid
Also known as: beta-Hydroxyisovaleric acid, 3-Hydroxyisovaleric acid, 3-hydroxy-3-methylbutyric acid, beta-Hydroxy-beta-methylbutyric acid, HMB, MFCD00059081
3-Hydroxy-3-methylbutanoic acid (CAS 625-08-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H10O3 and a molecular weight of 118.13100 g/mol. Key properties include a melting point of −80 °C(lit.), a boiling point of 88 °C1 mm Hg(lit.), a density of 0.938 g/mL at 25 °C(lit.) and a flash point of 113 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 625-08-1
- Jingsj CID
- J-48598-3
- Molecular Formula
- C5H10O3
- Molecular Weight
- 118.13100 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −80 °C(lit.) |
|---|---|
| Boiling Point | 88 °C1 mm Hg(lit.) |
| Density | 0.938 g/mL at 25 °C(lit.) |
| Flash Point | 113 °C |
| Exact Mass | 118.06300 |
| PSA | 57.53000 |
| LogP | 0.23200 |
| Refractive Index | n20/D 1.4415(lit.) |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Mock NI, et al. Increased urinary excretion of 3-hydroxyisovaleric acid and decreased urinary excretion of biotin are sensitive early indicators of decreased biotin status in experimental biotin deficiency. 1997 Apr;65(4):951-8. |
Customs & Trade Information
| HS Code | 2918199090 |
|---|---|
| Summary | 2918199090 other carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-Hydroxy-3-methylbutanoic acid?
The CAS number of 3-Hydroxy-3-methylbutanoic acid is 625-08-1.
What are the molecular formula and molecular weight of 3-Hydroxy-3-methylbutanoic acid?
3-Hydroxy-3-methylbutanoic acid has molecular formula C5H10O3 and molecular weight 118.13100 g/mol.
Is 3-Hydroxy-3-methylbutanoic acid hazardous?
3-Hydroxy-3-methylbutanoic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 3-Hydroxy-3-methylbutanoic acid?
For 3-Hydroxy-3-methylbutanoic acid, Upstream Products: Diacetone alcohol, tert-Butanol, 2-Methyl-4-penten-2-ol; Downstream Products: 3-Methyl-2-butenoic acid, tert-Butanol, ethyl 3-hydroxy-3-methylbutanoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Hydroxy-3-methylbutanoic acid (CAS 625-08-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48598-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.