2-MERCAPTO-L-HISTIDINE
- CAS NO.:2002-22-4
- Empirical Formula: C6H9N3O2S
- Molecular Weight: 187.22
- MDL number: MFCD00047018
- EINECS: 217-899-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 03:20:20
What is 2-MERCAPTO-L-HISTIDINE?
Chemical properties
Colourless Crystals
The Uses of 2-MERCAPTO-L-HISTIDINE
An intermediate in the formation of L-egothioneine, a natural amino acid ubiquitously present in cells and tissues of most plants and mammalian species. In humans, L-ergothioneine is found in red blo od cells, liver, kidney, brain, seminal fluid, and cataract-free lenses at concentrations ranging from 100 uM to 2 mM. L-ergothioneine is exclusively biosynthesized in fungi and mycobacteria. Hence, humans assimilate it through dietary intake.
The Uses of 2-MERCAPTO-L-HISTIDINE
An intermediate in the formation of L-egothioneine, a natural amino acid ubiquitously present in cells and tissues of most plants and mammalian species. In humans, L-ergothioneine is found in red blood cells, liver, kidney, brain, seminal fluid, and cataract-free lenses at concentrations ranging from 100 uM to 2 mM. L-ergothioneine is exclusively biosynthesized in fungi and mycobacteria. Hence, humans assimilate it through dietary intake.L-ergothioneine has been proven to act as an antioxidant in vivo and to afford protection from g and UV radiation as well as from singlet oxygen in vivo. Recently, it has been shown that L-ergothioneine protects isolated perfused heart against the deleterious effect of post-ischemic reperfusion.The intermediate, 2-mercaptohistine has been used for the
Properties of 2-MERCAPTO-L-HISTIDINE
| Melting point: | 320-325°C |
| Boiling point: | 376.3±52.0 °C(Predicted) |
| Density | 1.52±0.1 g/cm3(Predicted) |
| storage temp. | Sealed in dry,2-8°C |
| solubility | Aqueous Acid (Slightly) |
| form | Solid |
| pka | pK1:1.84(+1);pK2:8.47(0);pK3:11.4(SH) (25°C) |
| color | Off-White |
Safety information for 2-MERCAPTO-L-HISTIDINE
| Signal word | Warning |
| Pictogram(s) |
![]() Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H317:Sensitisation, Skin H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 2-MERCAPTO-L-HISTIDINE
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