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Product Name: L-Cysteine Hydrochloride Monohydrate
Chemical Formula: C3H7NO2S•HCl•H2O
CAS Number: 7048-04-6
Synonyms: S-(2-Amino-2-carboxyethyl) mercaptan hydrochloride monohydrate
Recommended Uses: Common in food processing, pharmaceutical manufacturing, biochemical research
Supplier Details: Include reputable chemical supply contact information, emergency telephone numbers, and address
Classification: Eye Irritation Category 2A, Skin Irritation Category 2
GHS Label Elements: Warning Signal Word; Hazard pictograms for irritation
Hazard Statements: May cause eye irritation, skin irritation, respiratory discomfort if dust inhaled
Precautionary: Avoid breathing dust, ensure adequate ventilation, wear protective gloves and eye protection
Chemical Name: L-Cysteine Hydrochloride Monohydrate
Concentration: 99-101%
Impurities: None determined at regulatory significance
Molecular Weight: 175.64 g/mol
Ingredient Purity: Meets pharmaceutical and food-grade standards where specified
Inhalation: Move exposed person to fresh air, keep comfortable for breathing, seek medical attention if symptoms persist
Eye Contact: Rinse cautiously with water for 15 minutes, remove contact lenses if present, medical consultation recommended
Skin Contact: Wash with soap and plenty of water, remove contaminated clothing
Ingestion: Rinse mouth thoroughly, seek medical advice if large quantity consumed or discomfort occurs
Note to Physicians: Treat symptomatically based on clinical judgment; no antidote available
Suitable Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or foam
Hazardous Combustion Products: Hydrogen chloride, sulfur oxides, nitrogen oxides
Special Protective Equipment: Firefighters should wear full protective gear and self-contained breathing apparatus
Fire Hazards: Dust from this chemical can form explosive mixtures in air
Advice: Avoid inhalation of decomposition products, use water to cool containers exposed to fire
Personal Precautions: Wear appropriate respiratory protection, gloves, eye and face protection
Environmental Precautions: Prevent runoff into drains, surface water, or soil
Cleanup Methods: Collect spillage in dry, clean containers, sweep up avoiding dust formation, ventilate area, dispose of as local regulations direct
Emergency Procedures: Evacuate personnel, ensure good ventilation
Precautions for Safe Handling: Handle in accordance with good industrial hygiene, avoid dust formation, keep containers sealed
Safe Storage: Store in cool, dry, well-ventilated location, away from incompatible substances such as strong oxidizing agents
Packaging: Use chemical-resistant containers, label properly
Hygiene Measures: Wash hands thoroughly after handling, keep work area clean
Engineering Controls: Use local exhaust ventilation to minimize airborne dust
Eye Protection: Use chemical safety goggles
Skin Protection: Wear chemical-resistant gloves and protective clothing
Respiratory Protection: NIOSH-approved respirator for dust exposure scenarios
Exposure Limits: No established OSHA/ACGIH limits for this compound; use general particulate limits (10 mg/m³ total dust)
Workplace Monitoring: Monitor airborne concentrations if dust is generated in routine handling
Appearance: White crystalline powder
Odor: Mild, characteristic
pH: 1.0–2.0 (1% solution in water)
Melting Point: 175–180 °C
Solubility: Highly soluble in water, insoluble in most organic solvents
Relative Density: About 1.68 g/cm³
Boiling Point: Decomposes before boiling
Vapor Pressure: Negligible
Partition Coefficient (log Pow): Not determined
Other Data: Stable under recommended transport/storage conditions, not volatile
Chemical Stability: Stable under normal temperatures and pressures, moisture-sensitive
Possible Hazardous Reactions: Reacts with strong oxidizers producing hazardous gases
Conditions to Avoid: Excessive humidity, open flames, strong sunlight
Incompatible Materials: Strong bases, strong oxidizers
Hazardous Decomposition Products: Hydrogen chloride, sulfur dioxide, nitrogen oxides
Acute Toxicity: Oral LD50 (rat): >1,000 mg/kg
Skin: May cause irritation upon prolonged contact
Eyes: May cause irritation, redness, watering
Inhalation: Dust may cause respiratory tract irritation
Chronic Effects: No documented chronic toxicity in normal laboratory use; overexposure has not been linked to carcinogenicity or mutagenicity based on available studies
Special Sensitization: No evidence for skin or respiratory sensitization in industrial data
Symptoms of Overexposure: Nausea, headache, irritation of eyes or throat
Aquatic Toxicity: Limited data; not expected to be highly toxic to aquatic organisms at typical spill concentrations
Persistence and Degradability: Biodegradable, breaks down into non-hazardous substances
Bioaccumulation Potential: Expected low
Mobility in Soil: Highly mobile if released in water, low adsorption to soil
Other Effects: Large spills can cause minor oxygen depletion in surface waters
Waste Treatment Methods: Dispose as non-hazardous chemical waste according to local, regional, and national regulations
Container Handling: Triple rinse and recycle or dispose in compliance with healthy and safety guidelines
Special Precautions: Do not allow untreated material to enter surface waters or sewage systems
Contaminated Packaging: Dispose as unused product, ensure all labels removed
UN Number: Not regulated for transport
Transport Hazard Class: Not classified as hazardous under transport codes
Packing Group: Not assigned
Environmental Hazards: Not a marine pollutant
Transport Precautions: Protect from moisture, use compatible containers, keep separate from strong oxidizers
Proper Shipping Name: L-Cysteine Hydrochloride Monohydrate
OSHA Status: Not classified as hazardous under OSHA regulation (29 CFR 1910.1200)
TSCA Inventory Status: Listed
WHMIS Classification: Not hazardous under WHMIS guidelines
REACH Status: Exempted or pre-registered for production/import in Europe, confirm registration where required
FDA Status: Approved as food additive and ingredient when used according to GMP
Other Regulations: No known restrictions under major international chemical inventories, always check regional guidelines for application
