L-Threonine
Also known as: (2S,3R)-2-Amino-3-hydroxybutanoic acid, (2S,3R)-2-Amino-3-hydroxybutyric acid, (2S,3R)-Threonine, L-2-Amino-3-hydroxybutyric acid, L-α-Amino-β-hydroxybutyric acid, Threonine, Thr, H-Thr-OH, [R-(R*,S*)]-2-Amino-3-hydroxybutanoic acid, Butanoic acid, 2-amino-3-hydroxy-, (R-(R*,S*))-, L-Threonine (JP15), UNII:TFM6DU5S6A
L-Threonine (CAS 72-19-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H9NO3 and a molecular weight of 119.119 g/mol. Key properties include a melting point of 255ºC, a boiling point of 345.8±32.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 162.9±25.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 72-19-5
- Jingsj CID
- J-902232-6
- Molecular Formula
- C4H9NO3
- Molecular Weight
- 119.119 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 255ºC |
|---|---|
| Boiling Point | 345.8±32.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 162.9±25.1 °C |
| Exact Mass | 119.058243 |
| PSA | 83.55000 |
| LogP | -1.23 |
| Vapor Pressure | 0.0±1.7 mmHg at 25°C |
| Refractive Index | 1.507 |
Activity & Biological Data
| Additional Information | [1]. Zhao H, et al. Increasing L-threonine production in Escherichia coli by engineering the glyoxylate shunt and the L-threonine biosynthesis pathway. Appl Microbiol Biotechnol. 2018 Jul;102(13):5505-5518. |
|---|
Customs & Trade Information
| HS Code | 2922509090 |
|---|---|
| Summary | 2922509090. other amino-alcohol-phenols, amino-acid-phenols and other amino-compounds with oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of L-Threonine?
The CAS number of L-Threonine is 72-19-5.
What are the molecular formula and molecular weight of L-Threonine?
L-Threonine has molecular formula C4H9NO3 and molecular weight 119.119 g/mol.
What are the upstream and downstream products of L-Threonine?
For L-Threonine, Upstream Products: O-Methyl-L-threonine, O-Phospho-L-threonine, ch3cho; Downstream Products: L(+)-2-Aminobutyric acid, (S)-(-)-1-Phenylpropylamine, 1-phenylpropan-1-amine.
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-Threonine (CAS 72-19-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-902232-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.