Product Name: Sinopec Styrene-Ethylene-Butylene-Styrene
Common Names: SEBS, Block Copolymer Rubber
Manufacturer: Sinopec Group
Recommended Uses: Manufacturing elastomers, adhesives, sealants, plastic modifiers, medical devices, wire coating, footwear
Emergency Phone: Available through Sinopec customer care or local hazard hotline
Address: Headquarters, Sinopec Group, Beijing, China
Product Code: Assigned as per batch; traceable via shipping documents
Email Contact: msds@sinopec.com
Date of Issue: Refer to current shipping batch for latest version
GHS Classification: Non-hazardous under normal handling
Physical Hazards: May form dust during processing, dust could cause mechanical irritation
Health Hazards: Fumes from overheating or combustion may irritate respiratory tract, skin, eyes
Environmental Hazards: Unlikely under intended use, but pellet spills may threaten aquatic life through ingestion
Label Elements: None required for routine handling in solid form
Signal Word: Not applicable
Pictograms: Not required
Precautionary Statements: Avoid breathing dust, use local ventilation, keep from waterways in pellet form
Chemical Name: Styrene-Ethylene-Butylene-Styrene Block Copolymer
CAS Number: 66070-58-4
Purity: >98% SEBS in most grades
Component Breakdown: Styrene Monomer (styrene blocks), Ethylene/Butylene Rubber Segments
Impurities: Residual monomers and processing aids typically less than 1%
Other Additives: Food-grade antioxidants in some grades for stability
Inhalation: Remove to fresh air, seek medical attention for persistent symptoms, irritation usually mild
Skin Contact: Wash with water and mild soap to remove dust, cooled molten polymer should peel or flake off; for thermal burns, cool immediately with water, seek medical aid
Eye Contact: Remove contact lenses, flush eyes generously with water, seek medical advice if irritation persists
Ingestion: Material is considered inert, not expected to be toxic, seek medical help if symptoms develop
Note to Physicians: Treat symptoms, no known specific antidote for solid SEBS exposure
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, water spray
Unsuitable Extinguishing Media: High-pressure water jets may spread burning pellets
Fire Hazards: Material burns with dense black smoke releasing CO, CO2, traces of aromatic compounds
Protective Equipment: Full-face self-contained breathing apparatus and protective clothing for responders
Special Hazards: Melted SEBS may cause burns, containers may produce hazardous vapors upon combustion, flame propagation by dust is possible
Hazardous Combustion Products: Carbon monoxide, styrene, hydrocarbons, soot
Personal Precautions: Use goggles and gloves, avoid breathing dust, keep slip hazard in mind around spilled pellets
Environmental Precautions: Prevent bulk release to drains or natural waters, sweep up pellets promptly
Cleaning Methods: Scoop or vacuum up solid material, wash spill site with water for dust removal, dispose in compliance with local waste rules
Other Notes: Avoid using compressed air to clean spills; static discharge can occur with airborne powder
Handling: Keep bags sealed when not in use, avoid creating dust, ground handling equipment to reduce static
Storage: Store in cool, dry, well-ventilated places away from strong oxidizers and open flame
Temperature Conditions: Protect from temperatures above 40°C for long-term storage, avoid freezing for packaging integrity
Incompatible Materials: Strong acids, bases, oxidizers
Safe Packaging Materials: Use original or inert containers, avoid unlined steel drums
Other Guidance: Rotate stock, inspect packaging before use
Occupational Exposure Limits: No established limits for SEBS, maintain workplace dust below 5 mg/m³ (total inhalable)
Ventilation: Local exhaust preferred when processing at high temperatures or if dust is generated
Eye Protection: Safety glasses or goggles in processing areas
Skin Protection: Nitrile or neoprene gloves, coveralls to avoid skin accumulation of dust
Respiratory Protection: Dust masks or respirators for heavy dust or melting operations
Other Controls: Wash hands before eating or leaving work area, clean work surfaces regularly
Physical State: Solid pellets, powder, or granules (off-white to light yellow)
Odor: Mild hydrocarbon-type
Melting Point/Range: 90–200°C depending on grade
Density: 0.88–0.92 g/cm³
Solubility: Insoluble in water, soluble in aromatic/alkane solvents
Vapor Pressure: Negligible at room temperature
Boiling Point: Not applicable (decomposes before boiling)
Flash Point: >280°C
Auto-ignition Temperature: >350°C
Decomposition Temperature: Above 250°C thermal breakdown creates fumes
Evaporation Rate: Not applicable (non-volatile)
pH: Neutral (solids)
Chemical Stability: Stable at typical storage and processing conditions
Stability Concerns: Degrades only with prolonged overheating or exposure to UV
Conditions to Avoid: Open flame, strong oxidants, temperatures above recommended processing
Hazardous Reactions: No known hazardous polymerization, reacts with strong acids or oxidizers forming hazardous byproducts
Decomposition Products: Thermal decomposition can generate styrene and volatile organics
Acute Toxicity: Not acutely toxic via oral, inhalation, or dermal routes
Chronic Effects: No evidence of chronic health effects in standard workplace exposures
Irritation: Dust may cause minor mechanical irritation to eyes and skin
Sensitization: Not a known sensitizer
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, OSHA
Mutagenicity: No data indicating mutagenic effects
Reproductive Toxicity: No data indicating reproductive hazard under intended use
Eco-Toxicity: Unlikely to cause acute harm to aquatic life; risk is physical due to pellet ingestion by wildlife
Persistence and Degradability: SEBS is durable, not readily biodegradable in environment
Bioaccumulation Potential: Low, due to the polymer’s high molecular weight and insolubility
Mobility in Soil: Pellets remain near spill site, little migration in groundwater
Other Adverse Effects: Pellets can contribute to microplastics burden in aquatic environments
Waste Disposal: Recycle clean waste where facilities exist, landfill permitted for non-contaminated waste, incinerate at approved sites
Environmental Precautions: Minimize releases to water and soil
Container Disposal: Ensure packaging is empty before recycling or disposal, do not reuse for food or water
Regulatory Waste Code: Follow municipal and national codes for plastic waste
UN Number: Not classified as dangerous goods for transport
Transport Hazard Class: Not regulated
Packing Group: Not regulated
Labels Required: None for standard transit
Special Precautions: Prevent leaks and loss of pellets, secure loads to avoid dust release
Bulk Transport: Ensure tanks, vessels are clean and dry before load-in
Chemical Inventory Status: Included in China, EU (REACH), US (TSCA), Japan, Korea chemical inventories
Labeling Requirements: No special hazard labeling required for SEBS in solid form under GHS
Right-to-Know Regulations: Available globally from supplier
SARA Title III: Not subject to SARA reporting
Other Regulatory Notes: Additives and formulation aids comply with regional technical and food-contact standards where applicable, users should verify for their location and application
