L-Pyroglutamic acid
Also known as: (S)-(-)-2-Pyrrolidone-5-carboxylic acid, 5-Oxo-L-proline, 5-Oxoproline, L-2-Pyrrolidone-5-carboxylic acid, L-5-Oxoproline, L-Glutamic acid lactam, L-Glutiminic acid, 5-Oxo-2-pyrrolidinecarboxylic acid, H-Pyr-OH, H-L-Pyr-OH, L-PCA
L-Pyroglutamic acid (CAS 98-79-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H7NO3 and a molecular weight of 129.114 g/mol. Key properties include a melting point of 160-163 °C(lit.), a boiling point of 382.4±52.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 185.1±30.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 98-79-3
- Jingsj CID
- J-10388-8
- Molecular Formula
- C5H7NO3
- Molecular Weight
- 129.114 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 160-163 °C(lit.) |
|---|---|
| Boiling Point | 382.4±52.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 185.1±30.7 °C |
| Exact Mass | 129.042587 |
| PSA | 66.40000 |
| LogP | -1.95 |
| Vapor Pressure | 0.0±2.0 mmHg at 25°C |
| Refractive Index | 1.627 |
| Additional Property | 10-15 g/100 mL (20 ºC) |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|
Customs & Trade Information
| HS Code | 2933790090 |
|---|---|
| Summary | 2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of L-Pyroglutamic acid?
The CAS number of L-Pyroglutamic acid is 98-79-3.
What are the molecular formula and molecular weight of L-Pyroglutamic acid?
L-Pyroglutamic acid has molecular formula C5H7NO3 and molecular weight 129.114 g/mol.
What are the upstream and downstream products of L-Pyroglutamic acid?
For L-Pyroglutamic acid, Upstream Products: L-(+)Sodium glutamate, Boc-L-pyroglutamic acid, gamma-Benzyl L-glutamate; Downstream Products: (5S)-5-[[[(tert-Butyl)dimethylsilyl]oxy]methyl]pyrrolidin-2-one, N-Benzyloxycarbonyl-L-pyroglutamic acid, (2S,5S)-1-(tert-butoxycarbonyl)-5-methylpyrrolidine-2-carboxylic acid.
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-Pyroglutamic acid (CAS 98-79-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-10388-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.