 
        | L-Cysteine hydrochloride anhydrous Basic information | 
| Product Name: | L-Cysteine hydrochloride anhydrous | 
| Synonyms: | L-(+)-α-amino-β-thiopropionic acid;L-β-mercapto;(2R)-2-Amino-3-sulfanylpropanoic acid hydrochloride;(2R)-2-Amino-3-mercaptopropanoic acid·hydrochloric acid;L-Cisteine·hydrochloride;L-Cysteine·hydrochloric acid;L-Cysteine hydrochlo;L-Cysteine hydrochloride anhydrous, extra pure | 
| CAS: | 52-89-1 | 
| MF: | C3H8ClNO2S | 
| MW: | 157.62 | 
| EINECS: | 200-157-7 | 
| Product Categories: | Amino Acid Derivatives;Amino acidsPeptide Synthesis;Cysteine/Cystine;Amino Acids and Vitamins;Amino AcidsNutrition Research;Reagents and Supplements;L-Amino Acids;Amino acidsIon Channels;NMDA Agonists;Biochemicals Found in Plants;Excitatory Amino Acids;Ionotropic Glutamate Receptor ModulatorsNeurotransmitters;Ligand-Gated Ion Channels;Nutrition Research;Food and Feed Additive;Cysteine [Cys, C];Amino Acids;Nutritional Supplements | 
| Mol File: | 52-89-1.mol | 
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| L-Cysteine hydrochloride anhydrous Chemical Properties | 
| Melting point | 180°C | 
| alpha | 5.5 º (c=8, 6 N HCL) | 
| storage temp. | Store at RT. | 
| solubility | H2O: 1 M at 20 °C, clear, colorless | 
| form | Solid | 
| color | White to light brown | 
| 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. | 
| InChIKey | IFQSXNOEEPCSLW-DKWTVANSSA-N | 
| 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 | 
| Hazard Codes | Xi | 
| Risk Statements | 36/37/38 | 
| Safety Statements | 26-36 | 
| WGK Germany | 2 | 
| RTECS | HA2275000 | 
| F | 3-10-23 | 
| TSCA | Yes | 
| HS Code | 29309013 | 
| Toxicity | LD50 intraperitoneal in mouse: 1250mg/kg | 
| MSDS Information | 
| Provider | Language | 
|---|---|
| L-Cysteine hydrochloride anhydrous | English | 
| SigmaAldrich | English | 
| ALFA | English | 
| L-Cysteine hydrochloride anhydrous Usage And Synthesis | 
| Chemical Properties | solid | 
| Uses | As dough conditioner. | 
| Definition | ChEBI: A hydrochloride obtained by combining L-cysteine with one molar equivalent of hydrogen chloride. | 
| 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 r, or from hot 20% HCl. Dry it under vacuum over P2O5. Hygroscopic. [Beilstein 4 III 1580, 1600.] | 
| L-Cysteine hydrochloride anhydrous Preparation Products And Raw materials | 
| Raw materials | Ethanol-->Stannous chloride dihydrate-->L-Cystine-->L-Cysteine-->thiazoline | 
| Preparation Products | N-Boc-S-Trityl-L-cysteine-->Carbocistein |