3-Hydroxybutyric acid
Synonym(s):(±)-3-Hydroxybutanoic acid;DL -β-Hydroxybutyric acid
- CAS NO.:625-71-8
- Empirical Formula: C4H8O3
- Molecular Weight: 104.1
- MDL number: MFCD00004546
- EINECS: 206-099-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 01:12:24
What is 3-Hydroxybutyric acid?
The Uses of 3-Hydroxybutyric acid
3-Hydroxybutyric acid was used in enantioselective synthesis of D-(-)-3-hydroxybutyric acid by Escherichia coli.
Definition
ChEBI: 3-hydroxybutyric acid is a straight-chain 3-hydroxy monocarboxylic acid comprising a butyric acid core with a single hydroxy substituent in the 3- position; a ketone body whose levels are raised during ketosis, used as an energy source by the brain during fasting in humans. Also used to synthesise biodegradable plastics. It has a role as a human metabolite. It is a 3-hydroxy monocarboxylic acid, a hydroxybutyric acid and an (omega-1)-hydroxy fatty acid. It is functionally related to a butyric acid. It is a conjugate acid of a 3-hydroxybutyrate.
General Description
3-Hydroxybutyric acid forms films of random copolymer with (R)-3-hydroxypentanoic acid, (R)-3-hydroxyhexanoic acid, 4-hydroxybutyric acid, 6-hydroxyhexanoic acid and (S,S)-lactide by the melt-crystallized method. It is an important intermediate for the fine chemical industry.
Properties of 3-Hydroxybutyric acid
| Melting point: | 49°C |
| Boiling point: | 118-120 °C/2 mmHg (lit.) |
| Density | 1.126 g/mL at 25 °C (lit.) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | 2-8°C |
| pka | 4.70(at 25℃) |
| CAS DataBase Reference | 625-71-8(CAS DataBase Reference) |
| EPA Substance Registry System | Butanoic acid, 3-hydroxy-(625-71-8) |
Safety information for 3-Hydroxybutyric acid
| Signal word | Danger |
| Pictogram(s) |
![]() Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for 3-Hydroxybutyric acid
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![POLY[(R)-3-HYDROXYBUTYRIC ACID-CO-(R)-3-HYDROXYVALERIC ACID (~9:1)]](https://img.chemicalbook.in/CAS/20180808/GIF/92267-82-8.gif)




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