2-Mercapto-L-histidine
Also known as: 2-Mercapto-L-histidine, 2-Mercaptohistidine, 2-Sulfanyl-L-histidine, 2-Thiol-L-histidine, L-2-Thiolhistidine, L-Thiohistidine, (S)-2-Amino-3-(2-thioxo-2,3-dihydro-1H-imidazol-4-yl)propanoic acid, (S)-alpha-amino-2,3-dihydro-2-thioxo-1H-imidazole-4-propionic acid, 3-(2-Thioxo-2,3-dihydro-1H-imidazol-4-yl)alanine, H-2-Mercapto-His-OH, H-His(2-Mercapto)-OH
2-Mercapto-L-histidine (CAS 2002-22-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H9N3O2S and a molecular weight of 187.220 g/mol. Key properties include a melting point of 320-325ºC, a boiling point of 376.3±52.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 181.4±30.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2002-22-4
- Jingsj CID
- J-1517500-5
- Molecular Formula
- C6H9N3O2S
- Molecular Weight
- 187.220 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 320-325ºC |
|---|---|
| Boiling Point | 376.3±52.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 181.4±30.7 °C |
| Exact Mass | 187.041550 |
| PSA | 130.80000 |
| LogP | 0.16 |
| Vapor Pressure | 0.0±1.8 mmHg at 25°C |
| Refractive Index | 1.695 |
| Storage Conditions | -15°C |
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 2-Mercapto-L-histidine?
The CAS number of 2-Mercapto-L-histidine is 2002-22-4.
What are the molecular formula and molecular weight of 2-Mercapto-L-histidine?
2-Mercapto-L-histidine has molecular formula C6H9N3O2S and molecular weight 187.220 g/mol.
What are the upstream and downstream products of 2-Mercapto-L-histidine?
For 2-Mercapto-L-histidine, Upstream Products: Potassium thiocyanate, L-Histidine, L-Histidine monohydrochloride monohydrate; Downstream Products: L-Histidine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Mercapto-L-histidine (CAS 2002-22-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1517500-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.