Product Name: 3-Mercapto-1-Propanesulfonic Acid Sodium
SYNONYMS: Sodium 3-mercapto-1-propanesulfonate, MPS Na Salt
CAS Number: 17636-10-1
EC Number: 241-088-6
Recommended Uses: Electroplating additive, catalyst, intermediate in fine chemical synthesis
Supplier Contact: [Supplier Info]
Emergency Telephone: [Emergency Number]
Classification: Skin irritation category 2, Eye irritation category 2A, Acute toxicity (oral) category 4, Specific target organ toxicity – single exposure category 3
Hazard Statements: Causes skin irritation, causes serious eye irritation, harmful if swallowed, may cause respiratory irritation
Pictograms: Exclamation mark (GHS07)
Signal Word: Warning
Precautionary Statements: Avoid breathing dust/fume/gas/mist/vapours/spray, wash hands thoroughly after handling, use only outdoors or in a well-ventilated area, wear protective gloves/eye protection/face protection
Chemical Name: 3-Mercapto-1-propanesulfonic acid sodium salt
Common Name: MPS Na
CAS Number: 17636-10-1
Percent (w/w): 98% or higher
Impurities: Typical batch contains trace sodium sulfate and water
Inhalation: Remove to fresh air, keep person at rest in a position comfortable for breathing, seek medical advice if symptoms persist
Skin Contact: Remove contaminated clothing, flush skin with plenty of water and soap, seek medical attention for irritation or allergic reaction
Eye Contact: Rinse carefully with water for several minutes, remove contact lenses if present and easy to do, continue rinsing, get medical help if irritation develops or persists
Ingestion: Rinse mouth with water, do not induce vomiting, seek immediate medical attention, never give anything by mouth to an unconscious person
Symptoms: Irritation to respiratory tract, skin, eyes; possible headache, dizziness, nausea if swallowed in quantity
Suitable Extinguishing Media: Water spray, carbon dioxide, dry chemical powder, foam
Unsuitable Media: Avoid high pressure water stream
Hazards: Thermal decomposition releases sulfur oxides, sodium oxides, hydrogen sulfide, possibly toxic fumes
Protective Equipment for Firefighters: Self-contained breathing apparatus and protective clothing
Advice: Move containers from fire area if safe, avoid inhalation of combustion gases, prevent fire-fighting water from entering local environment
Personal Precautions: Evacuate area, ensure adequate ventilation, avoid dust formation, wear personal protective equipment—gloves, goggles, respirator where dust present
Environmental Precautions: Prevent further leakage or spillage if safe, do not allow to enter drains, surface water or soil
Cleanup Methods: Sweep up and shovel into suitable dry, labeled container for disposal, wash spill site after material pickup is complete, ventilate area
Reference to other sections: For disposal see section on Disposal Considerations
Precautions for Safe Handling: Wear appropriate protective equipment, avoid contact with skin, eyes, and clothing, prevent formation of dust, wash thoroughly after handling, keep container tightly closed when not in use
Conditions for Safe Storage: Store in dry, well-ventilated place, keep away from incompatible substances like strong oxidizers, acids, and moisture, maintain in original packaging or approved container with labeling
Storage Temperature: Room temperature, avoid extremes of heat or cold
Incompatibles: Strong acids, oxidizing agents
Control Parameters: No occupational exposure limit established (check country/local guideline)
Engineering Controls: Provide adequate ventilation, use process enclosures, use local exhaust if dust generated
Personal Protective Equipment: Splash-proof goggles, chemical-resistant gloves (nitrile or rubber), protective clothing, dust mask or respirator (if dust present), eye wash stations and safety showers in work area
Hygiene Measures: Wash hands before breaks and at end of workshift, remove contaminated clothing and wash before reuse
Appearance: White or off-white crystalline powder
Odor: Mild or no odor, occasionally faint mercaptan scent
Odor threshold: Not established
pH (1% solution): Typically 6-8
Melting Point/Range: About 275°C (decomposes)
Boiling Point/Range: Not determined (decomposes before boiling)
Flash Point: Not applicable
Evaporation Rate: Not applicable
Flammability: Not flammable in solid form
Solubility: Soluble in water, slightly soluble in organic solvents
Partition Coefficient (log Kow): Not available
Vapor Pressure: Negligible at room temperature
Density: Approx. 1.64 g/cm3
Viscosity: Not relevant for solid
Decomposition: Emits sulfur oxides, hydrogen sulfide at high temperatures
Chemical Stability: Stable under recommended handling and storage conditions
Possibility of Hazardous Reactions: Exothermic reaction with strong acids or oxidizers, may liberate toxic gases
Conditions to Avoid: Extreme heat, moisture, contact with acids or oxidants
Hazardous Decomposition Products: Sulfur oxides (SOx), sodium oxides, and hydrogen sulfide on combustion/decomposition
Incompatible Materials: Acids, oxidizing agents, strong bases (under certain conditions)
Likely Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Rat oral LD50 about 600-1200 mg/kg
Skin Corrosion/Irritation: Causes moderate skin irritation on prolonged or repeated contact
Eye Damage/Irritation: Causes eye irritation that may result in redness and swelling
Respiratory/Skin Sensitization: Possibly a skin sensitizer; no evidence of respiratory sensitization in available studies
Chronic Effects: No significant chronic toxicity known from repeated low-level exposures
Carcinogenicity: Not listed as carcinogen by IARC, NTP, OSHA or EU CLP guidelines
Reproductive Toxicity: No data suggestive of reproductive toxicity on current studies
Symptoms Exposed to High Dose: Cough, shortness of breath, nausea, drowsiness
Aquatic Toxicity: Moderately toxic to aquatic life; LC50 (fish, 96h): 55-100 mg/L (estimated)
Persistence and Degradability: Biodegradable under aerobic conditions, ultimate degradation products are sulfate and carbon dioxide
Bioaccumulative Potential: Not expected to significantly bioaccumulate due to low log Kow
Mobility in Soil: Likely to remain soluble and mobile in water phase, possible risk to groundwater if large release occurs
Other Adverse Effects: May lower oxygen content in water if spilled in bulk amounts, possible formation of hydrogen sulfide in anaerobic conditions
Waste Disposal Methods: Dispose of in accordance with local, state, and federal regulations—send to approved chemical waste facility, do not discharge into sewers or environment
Container Disposal: Triple-rinse empty containers, treat as hazardous waste, follow any company-specific procedures for chemical disposals
Recommendations: Consult licensed waste disposal contractor, keep substances in properly labeled container until disposal
RCRA Waste Code: Not classified under RCRA hazardous waste codes at present
UN Number: Not regulated by UN Model Regulations
Proper Shipping Name: Not classified as dangerous goods for transport by air (IATA), land (ADR/RID), or sea (IMDG)
Transport Hazard Class: Not applicable
Packing Group: Not applicable
Environmental Hazards: Not marine pollutant under IMDG
Special Precautions for User: Avoid producing or handling dust; store upright in secure packaging
Transport in Bulk: Not regulated for bulk transport
US TSCA Status: Listed
EU REACH Status: Registered or pre-registered
OSHA HazCom: Hazardous chemical according to OSHA Hazard Communication Standard
SARA Title III: Not listed under Sections 302, 304, 313
California Prop 65: Not listed
Canada WHMIS: Classified as moderate health hazard
Other Regulations: Subject to chemical registration and workplace exposure standards in several jurisdictions
Labeling Requirements: GHS-compliant pictograms, hazard statements, precautionary statements
