L-Cysteine monohydrochloride
Synonym(s):L -Cysteine hydrochloride monohydrate
- CAS NO.：52-89-1
- Empirical Formula: C3H8ClNO2S
- Molecular Weight: 157.62
- MDL number: MFCD00064553
- EINECS: 200-157-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-11-11 20:33:26
What is L-Cysteine monohydrochloride?
Chemical properties
solid
The Uses of L-Cysteine monohydrochloride
As dough conditioner.
The Uses of L-Cysteine monohydrochloride
L-Cysteine hydrochloride, anhydrous is widely used as additive in food production. It is used as an antioxidant to promote fermentation and keep the flavor. It is also used in cosmetics and animal feed.
Definition
ChEBI: A hydrochloride obtained by combining L-cysteine with one molar equivalent of hydrogen chloride.
General Description
L-cysteine is a sulfur-containing amino acid.
Biochem/physiol Actions
NMDA glutamatergic receptor agonist that is also an agonist at AMPA glutamatergic receptors at high concentrations.
Safety Profile
: Moderately toxic by intraperitoneal, intravenous, and possibly other routes. Mutation data reported. When heated to decomposition it emits very toxic fumes of NOx, SOx, and Cl-.
Purification Methods
Likely impurities are cystine and tyrosine. Crystallise the salt from MeOH by adding diethyl ether, or from hot 20% HCl. Dry it under vacuum over P2O5. Hygroscopic. [Beilstein 4 III 1580, 1600.]
Properties of L-Cysteine monohydrochloride
| Melting point: | 180°C |
| alpha | 5.5 º (c=8, 6 N HCL) |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| color | White to light brown |
| Odor | odorless |
| optical activity | [α]20/D +6.4±0.3°, c = 5% in 5 M HCl |
| Water Solubility | SOLUBLE |
| Sensitive | Hygroscopic |
| Merck | 14,2781 |
| BRN | 3560277 |
| Stability: | Stable, but light, moisture and air sensitive. Incompatible with strong oxidizing agents, some metals. |
| CAS DataBase Reference | 52-89-1(CAS DataBase Reference) |
| NIST Chemistry Reference | L-cysteine hydrochloride(52-89-1) |
| EPA Substance Registry System | L-Cysteine hydrochloride (52-89-1) |
Safety information for L-Cysteine monohydrochloride
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for L-Cysteine monohydrochloride
| InChIKey | IFQSXNOEEPCSLW-DKWTVANSSA-N |
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