DL-Histidine
Also known as: H-DL-His-OH, DL-Histidin, 1H-Imidazole-4-alanine, EINECS 225-660-9, MFCD00005208
DL-Histidine (CAS 4998-57-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H9N3O2 and a molecular weight of 155.15700 g/mol. Key properties include a melting point of 280-290ºC (dec.), a boiling point of 458.9±35.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 231.3±25.9 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 4998-57-6
- Jingsj CID
- J-25761-4
- Molecular Formula
- C6H9N3O2
- Molecular Weight
- 155.15700 g/mol
- Category
- Organic Acids
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 280-290ºC (dec.) |
|---|---|
| Boiling Point | 458.9±35.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 231.3±25.9 °C |
| Exact Mass | 191.046158 |
| PSA | 92.00000 |
| LogP | -1.26 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.615 |
Activity & Biological Data
| Additional Information | [1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-1144. |
|---|
Customs & Trade Information
| HS Code | 2933290090 |
|---|---|
| Summary | 2933290090. other compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of DL-Histidine?
The CAS number of DL-Histidine is 4998-57-6.
What are the molecular formula and molecular weight of DL-Histidine?
DL-Histidine has molecular formula C6H9N3O2 and molecular weight 155.15700 g/mol.
What are the upstream and downstream products of DL-Histidine?
For DL-Histidine, Upstream Products: L-Histidine, N-Acetyl-DL-histidine; Downstream Products: D-Histidine, L-Histidine, Allylurea.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "DL-Histidine (CAS 4998-57-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-25761-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.