Product Name: Mercaptosilane Oligomer
Chemical Family: Organosilane
Synonyms: Silane, mercapto-functional, oligomeric
Recommended Use: Surface treatment, adhesion promoter, crosslinking agent
Manufacturer Contact: Customer Service, Emergency Telephone, Technical Support
Product Code: MPS-series
Classification: Flammable liquid, Category 3; Acute Toxicity, Category 4 (oral); Skin Corrosion/Irritation, Category 2; Eye Damage/Irritation, Category 2A; Specific Target Organ Toxicity (single exposure), Category 3 (respiratory system)
Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, harmful if swallowed, may cause respiratory irritation, flammable liquid and vapor
Pictograms: Flame, Exclamation Mark
Precautionary Statements: Keep away from heat/sparks/open flames/hot surfaces. Avoid breathing vapors. Wear protective gloves and eye protection. Wash skin thoroughly after handling. Use only outdoors or in a well-ventilated area. IF ON SKIN: Wash with soap and water. IF INHALED: Remove victim to fresh air and keep at rest.
Other Hazards: Strong odor, may release toxic gases on combustion, irritating to mucous membranes
Main Components: Mercaptosilane Oligomer (CAS number varies by grade)
Content: 90-100% by weight
Impurities: Possible residual monomers (<0.5%), silanol by-products (<0.3%), inorganic acid trace (<0.2%)
Stabilizers/Additives: None declared
Other Ingredients: Not intentionally added
Inhalation: Move affected individual to fresh air, keep at rest, consult a physician if symptoms persist or worsen (coughing, dizziness, headache).
Skin Contact: Remove contaminated clothing, immediately wash skin with water and soap for several minutes, seek medical attention for irritation or allergic reaction.
Eye Contact: Rinse eyes immediately with large amounts of water for at least 15 minutes, remove contact lenses if present, obtain medical aid as irritation, redness, or blurred vision can occur.
Ingestion: Rinse mouth, do not induce vomiting, drink water in small amounts if conscious, seek emergency medical help promptly.
Most Important Symptoms: Burning, stinging, respiratory discomfort, nausea, drowsiness.
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide (CO2)
Unsuitable Extinguishing Media: Do not use water jet as it may spread the fire
Special Hazards Arising: Flammable vapors, hazardous combustion products including sulfur oxides, silicon oxides, carbon monoxide, carbon dioxide, toxic fumes
Protective Equipment: Firefighters need self-contained breathing apparatus, full protective suit
Specific Methods: Cool surrounding containers with water spray, evacuate area, prevent runoff to water systems
Personal Precautions: Evacuate personnel, provide adequate ventilation, avoid breathing vapors or contact with skin and eyes, use recommended personal protective equipment
Environmental Precautions: Prevent spillage from entering drains, soil, or surface waters, notify authorities if material enters environment
Methods for Containment: Contain spill with inert absorbent (sand, earth), avoid using combustible material for clean-up
Clean Up Procedures: Scoop up and collect in suitable, closed, labeled containers for disposal, ventilate area, wash spill site thoroughly after cleanup
Handling: Work in well-ventilated spaces, avoid direct contact with skin, eyes, or clothing, wash hands after handling, refrain from eating, drinking, or smoking in work area, prevent static discharge by grounding all equipment
Storage Conditions: Store in tightly closed original containers, away from heat, sparks, open flames, oxidizing agents, acids, and moisture; keep below 30°C ideally, use with local exhaust ventilation
Incompatible Materials: Strong oxidizers, strong acids, moisture/humidity
Special Provisions: Keep away from food, feed, incompatible chemicals, labeled for industrial use only
Exposure Limits: No established occupational exposure limits for mercaptosilane oligomer; avoid inhalation, use common sense threshold limits for irritants
Engineering Controls: Local exhaust ventilation, mechanical ventilation if necessary, eye wash stations, emergency showers
Personal Protective Equipment (PPE): Protective gloves (nitrile, neoprene), chemical splash goggles, lab coats or aprons, suitable respiratory protection for high vapor concentrations
Hygiene Measures: Wash thoroughly after use, remove contaminated clothing, keep unprotected persons away
Appearance: Clear to slightly yellow liquid
Odor: Strong, unpleasant sulfurous odor
Odor Threshold: Detectable at low concentrations due to mercaptan group
pH: Not applicable/neutral in water
Melting Point/Freezing Point: Typically below -20°C
Boiling Point: 190 – 260°C (decomposition can occur prior to boiling)
Flash Point: 64 – 72°C (closed cup, approximate based on formulation)
Evaporation Rate: Slower than n-butyl acetate
Flammability: Flammable liquid and vapor
Upper/Lower Flammability Limits: 1 – 7% (estimated)
Vapor Pressure: Low at room temperature
Vapor Density: Heavier than air (estimate >1)
Relative Density: 1.04 – 1.12 g/cm³ @ 25°C
Solubility: Hydrophobic, limited solubility in water, soluble in common organic solvents
Partition Coefficient: Not specified, likely high logP for silane
Decomposition Temperature: Above 250°C
Viscosity: 10 – 100 mPa.s @ 25°C
Chemical Stability: Stable under recommended storage conditions, sensitive to heat, moisture, and light
Conditions to Avoid: Excess heat, ignition sources, water/moisture, open flames
Incompatible Materials: Strong oxidizers, acids, water, bases
Hazardous Decomposition Products: Silanol, methanethiol, hydrogen sulfide, silicon dioxide, carbon monoxide, carbon dioxide, sulfur dioxide
Hazardous Polymerization: Not expected under normal conditions
Acute Toxicity: Oral LD50 (rat): approximately 1,500–2,500 mg/kg (moderate toxicity)
Inhalation: Causes respiratory irritation, coughing, headache, possible lung damage at high concentrations
Skin: Can cause skin burns, redness, dermatitis, allergic response not common but possible
Eyes: Severe irritation, redness, watery eyes, prolonged contact can lead to damage
Chronic Effects: No evidence of chronic toxicity from oligomeric forms, no data for reproductive toxicity, mutagenicity, or carcinogenicity reported for this substance
Routes of Exposure: Inhalation, dermal contact, eye contact, ingestion
Symptoms: Nausea, headache, respiratory distress, burning sensation on skin and eyes, vomiting on ingestion
Ecotoxicity: Toxic to aquatic organisms at higher concentrations, potential for acute toxicity to fish, daphnia, and algae not fully quantified but recognized based on silane and mercaptan group toxicity
Persistence and Degradability: Mainly degrades via hydrolysis; siloxane residues form in water and soil but break down under strong microbial or chemical action, sulfur by-products can persist
Bioaccumulative Potential: Limited potential for bioaccumulation due to hydrolytic instability, but individual components may persist in certain environments
Mobility in Soil: Moderate to low, binds to soil particles or volatilizes under environmental conditions
Other Adverse Effects: Risk of fish kills from acute exposure, avoid discharge into waterways; no significant ozone depletion or global warming impact
Waste Treatment Methods: Incinerate in approved facility or dispose according to local, regional, national, and international regulations, do not pour down the drain or general waste streams
Contaminated Packaging: Rinse thoroughly before recycling or disposing, offer to licensed hazardous waste handler
Special Diaposal: Follow Chemical Waste Management Protocols, chemical-resistant containers only
Precautions: Avoid contact with soil, water, and sewers, don’t attempt neutralization in uncontrolled conditions
UN Number: UN 1993
UN Proper Shipping Name: Flammable Liquid, N.O.S. (contains mercaptosilane oligomer)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labels Required: Flammable liquid pictogram, keep upright, handle with care
Special Precautions: Avoid temperature extremes, secure container integrity during transport, inform carriers of hazardous nature
Marine Pollutant: Regarded as marine pollutant due to aquatic toxicity
Labeling: Conforms to GHS, OSHA Hazard Communication Standard, EU CLP regulation
Inventory Listings: Registered or notified under EPA TSCA (USA), EINECS/ELINCS (EU), REACH registered, DSL (Canada), AICS (Australia), ENCS (Japan), KECI (Korea) depending on region
Restrictions: Subject to hazardous chemical regulations for workplace exposure, use, transport, and disposal; reportable quantity thresholds apply per jurisdiction
SARA (USA): Listed as hazardous, reporting required for substantial release
Other Requirements: Provide risk and safety training for users, maintain local exposure records, monitor workplace air concentrations where appropriate, handle only by trained personnel
