Product Name: Styrene-Isoprene-Styrene Block Copolymer
Synonyms: SIS block copolymer
Manufacturer: Sinopec
Common Uses: Adhesives, Sealants, Flexible packaging, Compound modifications, Polymer blending
CAS Number: 25038-32-8
UN Number: Not regulated as dangerous goods
Emergency Contact: Refer to local Sinopec office or SDS emergency phone line
Product Code: Specific to bulk or grade batch
Address: Sinopec, China
Email Contact: Provided on official Sinopec documentation
Physical Hazards: Firm, off-white pellets or chunky solid, potential slip hazard; stable under ambient conditions
Chemical Hazards: Contains residual monomers and light chemical odor, minimal vapors at room temperature
GHS Label Elements: Not classified as hazardous under GHS criteria
Precautionary Statements: Avoid inhalation of dust, avoid eye and skin contact with fine particles, maintain good housekeeping
Health Hazards: Non-toxic in typical applications, dust may cause mild eye or respiratory irritation
Chronic Exposure Risks: None documented for typical workplace exposures
Warning Symbol: None required
Environmental Hazards: Low, not classified as hazardous to aquatic life
Component: Styrene-Isoprene-Styrene Block Copolymer
Chemical Family: Thermoplastic elastomer
CAS Number: 25038-32-8
Weight Percent: 100% SIS copolymer
Impurities: Trace residual monomers (<0.5%); process additives or antioxidants in small quantities, typically proprietary; no listed hazardous impurities at reportable levels
Other Identifiers: No hazardous fillers or plasticizers present
Inhalation: Move person into fresh air, rinse nose and mouth if dust is inhaled, seek attention if symptoms persist
Skin Contact: Wash skin with soap and water, remove contaminated clothing, seek medical advice for irritation or burns from hot material
Eye Contact: Rinse with plenty of lukewarm water, hold eyelids open, remove contact lenses if present, consult physician for persistent discomfort
Ingestion: Rinse mouth with water, offer small amounts of water, do not induce vomiting, seek medical evaluation if symptoms occur
Thermal Burns: For molten polymer contact, cool affected area with water, do not remove solidified material, seek immediate emergency care
Suitable Extinguishing Media: Water spray, foam, chemical powder, carbon dioxide
Specific Hazards: Melts and burns releasing dense smoke, carbon oxides and hydrocarbons
Protective Equipment: Full firefighting gear, self-contained breathing apparatus; avoid inhaling fumes
Fire Fighting Guidance: Cool containers exposed to fire with water spray, move undamaged containers from danger area if safe
Combustion Products: Carbon dioxide, carbon monoxide, hydrocarbons, possible traces of styrene or isoprene gases
Explosion Risk: Dust accumulation may present a minor explosion risk in confined spaces
Personal Precautions: Avoid dust formation, wear protective gloves and eye protection, ventilate area
Environmental Precautions: Prevent materials from entering drains or watercourses, collect spilled pellets to avoid wildlife ingestion
Clean-Up Methods: Sweep, vacuum or shovel spilled material back into proper container for reuse or disposal, wash area with water to remove residues
Secondary Hazards: Slippery when spilled on smooth surfaces
Waste Disposal: Dispose in accordance with local, national, and regional regulations
Handling Precautions: Use only in well-ventilated areas, prevent formation of dust, use proper lifting techniques for bulk loads
Personal Hygiene: Wash hands before eating, drinking, or smoking; avoid direct skin and eye contact with powders
Protection from Fire: Prevent buildup of dust; eliminate ignition sources in processing and storage
Storage Conditions: Store in cool, dry, well-ventilated area, avoid sunlight, moisture, and strong oxidizers
Container Requirements: Use original packaging or compatible sealed containers
Incompatibility: Strong acids, strong oxidizing agents; avoid direct contact with flame and high heat sources
Exposure Limits: None established for SIS copolymer; ACGIH nuisance dust TLV: 10 mg/m³ (inhalable), 3 mg/m³ (respirable)
Engineering Controls: Ventilation in processing areas; dust collection where needed
Personal Protective Equipment: Safety glasses or goggles; gloves for handling pellets; dust mask or respirator for dusty work
Thermal Protection: Use heat-resistant gloves for handling molten or hot product
General Hygiene: Wash thoroughly after handling, remove work clothing that becomes contaminated
Form: Solid, pellets or block
Color: White to light yellow
Odor: Mild hydrocarbon
Melting Point: Softens above 70–100°C
Boiling Range: Not applicable, decomposes
Specific Gravity: 0.92–0.96
Solubility: Insoluble in water, soluble in nonpolar organic solvents
Vapor Pressure: Negligible at room temperature
Explosion Limit: Not established
Flash Point: >300°C (closed cup, method varies)
Viscosity: Not applicable to solid form
Autoignition Temperature: >400°C
Chemical Stability: Stable under recommended handling and storage conditions
Hazardous Reactions: No dangerous reactions expected in normal industrial use
Reactivity: Not reactive under ambient conditions; avoid strong acids, oxidizers
Decomposition Products: Thermal breakdown releases carbon oxides, hydrocarbons, possibly small amounts of volatile organic compounds
Polymerization Risk: No hazardous polymerization anticipated
Acute Toxicity: Low toxicity by ingestion, inhalation, or skin contact; no acute effects anticipated
Skin Contact: Prolonged or repeated exposure can cause slight, temporary irritation
Eye Contact: Dust may irritate eyes, no known serious effects
Ingestion: Inert, not absorbed; large quantities could cause obstruction, seek medical attention
Long-Term Effects: No known long-term hazards from typical workplace exposure
Mutagenic/Carcinogenic Effects: Not listed as carcinogen by IARC, NTP, OSHA
Sensitization Potential: No evidence of sensitizing effect
Aquatic Toxicity: Not acutely hazardous; large or visible particles harmful if ingested by marine wildlife
Mobility: Low solubility and bulk; floats in water, does not migrate in soil
Persistence and Degradability: Not readily biodegradable; persists in the environment
Bioaccumulation: No data available, not expected due to physical form
Ecological Hazards: Mechanical hazard to aquatic animals if ingested
Recommended Disposal: Send to a licensed waste disposal site; material may be recycled if facilities exist
Incineration: Permitted in approved facility; combustion produces standard organic residues
Landfill: Acceptable under local regulations; ensure prevention of wildlife access
Packaging Disposal: Dispose bags or liners according to local recycling laws
Regulatory Notations: Not classified as hazardous waste in most regions
UN Number: Not regulated
Proper Shipping Name: Styrene-Isoprene-Styrene Block Copolymer
Hazard Class: Not regulated
Packing Group: Not applicable
Environmental Hazards: None identified
Special Precautions: Avoid damage to packages that could release pellets in transit
OSHA: Not classified as hazardous
TSCA Inventory: Listed
DSL/NDSL (Canada): Listed
REACH (Europe): Compliant according to importer requirements
Labeling Requirements: No special labeling required
Other Regulations: RoHS and food-contact rules depend on product grade and application
Restriction Announcements: Some countries or states may limit microplastic release; companies should track regulations by destination
Globally Harmonized System: Not classified as hazardous under GHS
