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Product Name: L-Cystine Dihydrochloride
Synonyms: L-α,α′-Diamino-β,β′-dithiodipropionic acid dihydrochloride
Chemical Formula: C6H14Cl2N2O4S2
CAS Number: 30925-07-6
Recommended Use: Laboratory reagent, chemical manufacturing
Manufacturer: Name and contact details of supplier
Emergency Contact: Local poison control center, company emergency line
Hazard Classification: Not classified as hazardous under GHS
Health Hazards: May cause skin or eye irritation, possible allergic reactions in sensitive individuals, ingestion can cause gastrointestinal disturbances
Physical Hazards: Non-flammable, stable under normal conditions
Environmental Hazards: May be harmful to aquatic life if released in significant quantities
Pictograms: None mandated
Signal Word: No signal word required under current regulations
Ingredient: L-Cystine Dihydrochloride
Chemical Formula: C6H14Cl2N2O4S2
Concentration: Pure substance
Impurities: Trace water or sodium chloride may be present from synthesis
Inhalation: Move affected person to fresh air, seek medical attention if symptoms like coughing or shortness of breath persist
Skin Contact: Wash immediately with plenty of water and mild soap, remove contaminated clothing, seek advice if irritation develops
Eye Contact: Rinse thoroughly with water for several minutes, keeping eyelids open, remove contact lenses if present, consult a physician if discomfort continues
Ingestion: Rinse mouth, do not induce vomiting, seek medical assistance if large amounts swallowed or symptoms appear
Notes for Physician: Treat symptomatically, support respiratory and cardiovascular functions as needed
Suitable Extinguishing Media: Use dry chemical powder, water spray, foam or carbon dioxide
Unsuitable Extinguishing Media: High volume water jet may spread spilled material
Specific Hazards Arising from Chemical: Hydrogen chloride, sulfur oxides, and nitrogen oxides may form on thermal decomposition
Protective Equipment: Wear self-contained breathing apparatus and full protective gear
Firefighting Instructions: Approach from upwind, prevent runoff into drains or waterways
Personal Precautions: Avoid contact with skin, eyes, and clothing, use personal protective equipment such as gloves, goggles, and lab coat
Environmental Precautions: Prevent further leakage or spillage, keep material away from drains, surface and groundwater
Methods for Cleanup: Gather spilled material using a dustless method, place in appropriate waste disposal container, ventilate area, wash spill site after material pickup
Handling Precautions: Use only in well-ventilated areas, avoid dust formation, do not breathe dust, avoid contact with skin and eyes, wash hands thoroughly after handling
Storage Conditions: Keep container tightly closed in cool, dry, well-ventilated place, store away from strong oxidizers and moisture, maintain container integrity to prevent contamination
Incompatibilities: Avoid contact with acids, bases, and oxidizing agents
Threshold Limit Values (TLVs): No specific OSHA or ACGIH exposure limits established
Engineering Controls: Use local exhaust ventilation to minimize dust and airborne particles, provide eyewash station in immediate vicinity
Personal Protective Equipment: Nitrile or latex gloves, safety goggles, lab coat or chemical-resistant apron, use respiratory protection in case of inadequate ventilation or high dust concentration
Hygiene Measures: Prohibit eating, drinking, or smoking in working area, wash hands and face after use, remove contaminated clothing and wash before reuse
Appearance: White to off-white crystalline powder
Odor: Odorless
pH: 2.0 – 3.0 (1% aqueous solution)
Boiling Point: Decomposes before boiling
Melting Point: 265°C (decomposes)
Flash Point: Not applicable
Flammability: Non-flammable
Vapor Pressure: Negligible
Solubility: Freely soluble in water
Density: 1.5 g/cm³
Partition Coefficient (n-octanol/water): Not determined
Molecular Weight: 313.22 g/mol
Chemical Stability: Stable under recommended storage and handling conditions
Conditions to Avoid: Exposure to heat, moisture, and incompatible substances
Incompatible Materials: Strong oxidizing agents, bases, strong acids
Hazardous Decomposition Products: Emits toxic fumes of hydrogen chloride, sulfur oxides, nitrogen oxides upon decomposition
Polymerization: Not known to occur
Acute Toxicity: Low acute toxicity, oral LD50 (rat) expected to be > 2000 mg/kg
Skin Irritation: May cause slight irritation, not a known sensitizer
Eye Irritation: May produce minor irritation
Respiratory Effects: Inhalation of dust may cause mild respiratory irritation
Chronic Effects: Not classified as carcinogenic, mutagenic, or toxic to reproduction
Signs and Symptoms: Redness, itching, discomfort on exposure
Additional Information: Exposures exceeding recommended levels might aggravate pre-existing conditions, particularly skin, eyes, or respiratory system
Ecotoxicity: Limited data, low potential for bioaccumulation, possible harmful effects to aquatic organisms in large releases
Persistence and Degradability: Expected to be biodegradable under environmental conditions
Mobility in Soil: Water soluble, potential to reach groundwater if released in large amounts
Bioaccumulation: Unlikely to bioaccumulate in food chain
Other Adverse Effects: No adverse environmental effects expected under normal use patterns
Waste Treatment Methods: Dispose of in accordance with national, regional and local regulations, do not discharge to sewer systems
Product Disposal: Incineration is recommended for bulk quantities, use properly labeled and approved waste containers
Packaging Disposal: Empty packaging should be rinsed and offered for recycling or disposal at approved facilities
Additional Notes: Consult local environmental authority for specific recommendations, avoid contamination of water sources
UN Number: Not regulated as dangerous goods
Transport Hazard Class: Not classified
Packing Group: Not assigned
Special Precautions: Use sealed containers to prevent spillage, transport in upright position, avoid excessive vibration and impact
Labeling Requirements: No special labeling required
Environmental Hazards: No transport environmental risks identified
Additional Transport Notes: Adhere to standard good transportation practices, avoid mixing with incompatible substances during transit
Classification: Not classified as hazardous under OSHA Hazard Communication Standard (29 CFR 1910.1200) or EU CLP Regulation
Inventory Status: Listed in TSCA, EINECS, REACH, other major chemical inventories
Labeling: No hazard statements or precautionary statements needed for standard handling
Workplace Safety: Compliance with standard industrial hygiene and safety practices remains necessary
Additional Compliance: Product use subject to local, national and international regulations governing chemicals
