L-Lactic acid
Also known as: (S)-2-Hydroxypropanoic acid, (S)-Lactic acid, L(+)-Lactic acid, (S)-(+)-Lactic acid, Sarcolactic acid, 2-Hydroxypropionic acid
L-Lactic acid (CAS 79-33-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H6O3 and a molecular weight of 90.078 g/mol. Key properties include a melting point of 52-54°C, a boiling point of 227.6±0.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 109.9±16.3 °C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 79-33-4
- Jingsj CID
- J-1968637-4
- Molecular Formula
- C3H6O3
- Molecular Weight
- 90.078 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 52-54°C |
|---|---|
| Boiling Point | 227.6±0.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 109.9±16.3 °C |
| Exact Mass | 90.031693 |
| PSA | 57.53000 |
| LogP | -0.70 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.451 |
| Additional Property | SOLUBLE |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|
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 L-Lactic acid?
The CAS number of L-Lactic acid is 79-33-4.
What are the molecular formula and molecular weight of L-Lactic acid?
L-Lactic acid has molecular formula C3H6O3 and molecular weight 90.078 g/mol.
Is L-Lactic acid hazardous?
L-Lactic acid has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of L-Lactic acid?
For L-Lactic acid, Upstream Products: L-Alanine, Propyl (S)-2-hydroxypropanoate, (−)-Ethyl L-lactate; Downstream Products: (S)-(-)-2-Acetoxypropionyl chloride, (S)-(+)-1,2-Propanediol, (3R,6R)-3,6-dimethyl-1,4-dioxane-2,5-dione.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "L-Lactic acid (CAS 79-33-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1968637-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.