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Product Name: Expandable Polystyrene (EPS)
Chemical Family: Aromatic polymer
Synonyms: EPS, Bead foam, Styrene polymer
Use: Insulation panels, packaging, construction material, food service containers
Supplier: Manufacturer or distributor details with phone and emergency contact information
Emergency Overview: White or colored beads or molded shapes, low odor, light weight
Hazard Classification: Not hazardous under normal use but can release harmful vapors during thermal decomposition or fire
Main Hazards: Dust buildup, static discharge, possible flammable vapors when heated
Route of Entry: Inhalation (fumes), skin and eye contact (dust or beads)
Acute Effects: Inhalation of vapors may irritate respiratory tract, contact with dust may irritate eyes or skin
Chronic Effects: Minimal under typical use; possible concerns with long-term exposure to styrene vapors
NFPA Ratings (scale 0–4): Health 1, Flammability 2, Reactivity 0
Chemical Name: Polystyrene
CAS Number: 9003-53-6
Percentage: 95-98%
Blowing Agent: Pentane (CAS: 109-66-0, 2-6%)
Minor Additives: Flame retardants, colorants, antistatic agents, surfactants (proprietary, less than 1%)
Hazardous Impurities: Residual styrene monomer (trace amounts, below regulated limits)
Inhalation: Move person to fresh air, provide oxygen or artificial respiration if needed, seek medical attention for persistent discomfort
Skin Contact: Wash with soap and water, seek medical help for irritation or allergic reactions
Eye Contact: Flush with plenty of water for at least 15 minutes, remove contact lenses, get medical advice if irritation continues
Ingestion: Not a likely route, but if ingested, rinse mouth, drink plenty of water, and get medical attention if symptoms develop
Advice for Medical Staff: Treat symptomatically, monitor for respiratory distress from inhaled vapors or smoke
Suitable Extinguishing Media: Water spray, foam, dry chemical, CO2
Unsuitable Media: Direct water stream may scatter molten material
Special Protective Equipment: Wear full protective gear and self-contained breathing apparatus (SCBA)
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, styrene fumes, dense black smoke, oxides of nitrogen and other hydrocarbons
Fire and Explosion Hazards: EPS beads and products can ignite at elevated temperatures, melted material may drip and spread fire; blowing agents (pentane) may form explosive mixtures with air before complete evaporation
Personal Precautions: Avoid inhalation of dusts, vapors, or fumes; ventilate area; use personal protective equipment
Environmental Precautions: Prevent runoff into drains, soil, or watercourses; contain spillage to avoid environmental contamination
Cleanup Methods: Collect beads and debris using non-sparking tools, sweep or vacuum; collect waste in appropriate containers for disposal
Special Notes: Decontaminate spill area with water after removal; avoid generation of static electricity
Handling: Ground containers and equipment to prevent static discharge; avoid sources of ignition and open flames; minimize dust generation; use in well-ventilated areas
Storage: Store in cool, dry, well-ventilated locations away from direct sunlight, ignition sources, oxidizing agents, strong acids and bases; keep away from food and beverages; store only in properly labeled containers
Storage Temperature: Below 30°C (86°F) recommended
Incompatibilities: Oxidizing materials, halogens, strong acids and bases
Exposure Limits: Styrene ACGIH TLV 20 ppm (TWA), Pentane ACGIH TLV 600 ppm (TWA)
Engineering Controls: Local exhaust ventilation for processes involving cutting or heating; static control equipment for bead handling
Personal Protection: Safety goggles, gloves (nitrile or PVC), dust masks for high-dust areas, flame-retardant clothing for fire risk zones
General Hygiene: Wash hands after handling; avoid eating, drinking or smoking in work areas; remove contaminated clothing
Appearance: White, gray, or colored spherical beads or shaped forms
Odor: Mild, slightly sweet odor (styrene-like, if detectable)
Odor Threshold: 0.23 ppm (styrene)
pH: Not applicable
Melting Point: ~230°C (446°F) for polystyrene
Boiling Point: Not applicable (decomposes before boiling)
Flash Point: 345°C (open cup, polymer); lower for pentane (−49°C)
Flammability: Flammable in presence of strong ignition sources
Vapor Pressure: Negligible for beads; moderate for residual pentane
Density: Typically 10–30 kg/m3 (for expanded beads)
Solubility: Insoluble in water; soluble in aromatic and chlorinated hydrocarbons
Partition Coefficient (n-octanol/water): Not applicable
Autoignition Temperature: 490°C (914°F) for polymer; much lower for pentane
Stability: Stable at normal temperatures and pressures, may release pentane over time
Hazardous Reactions: None expected in typical use, but exposure to strong oxidizers may promote hazardous decomposition
Conditions to Avoid: Heat, sparks, open flames, direct sunlight, static discharge, incompatibles
Hazardous Decomposition: Thermal breakdown can yield carbon monoxide, carbon dioxide, styrene, dense black smoke, fragments of hydrocarbon chains
Polymerization: Will not occur under normal use
Acute Toxicity: Low under normal handling; inhalation of decomposition vapors can cause headaches, dizziness, nausea
Skin Contact: May cause irritation in sensitive individuals due to dust
Eye Contact: Dust can cause mechanical irritation
Inhalation: Molten or burning EPS releases fumes that can irritate respiratory tract
Ingestion: Not expected to be toxic; may cause choking hazard if swallowed whole
Chronic Toxicity: Occupational exposure to styrene vapor (from unexpanded beads) can affect the nervous system; IARC classifies styrene as Group 2A (possibly carcinogenic to humans)
Reproductive and Developmental Effects: No known significant effects with finished EPS
Environmental Impact: Not readily biodegradable; persists in the environment; beads can be harmful to wildlife if ingested
Aquatic Toxicity: Low acute toxicity, but EPS litter is a recognized environmental issue
Bioaccumulation: EPS fragments may collect pollutants which could biomagnify in food chains
Mobility: EPS beads are light and may scatter by wind or water runoff
Degradation: Breakdown in sunlight over long periods, but full mineralization takes decades or longer
Waste Disposal: Recycle whenever possible (mechanical or thermal), otherwise dispose in accordance with local, regional, and national regulations
Incineration: Professional facilities required; incomplete combustion forms toxic fumes
Landfill: Acceptable where recycling is unavailable but contributes to long-term solid waste burden
Contaminated Packaging: Treat as solid plastic waste unless other chemicals present
UN Number: Not regulated for land transport unless still containing flammable blowing agent (pentane) in substantial quantities
Shipping Name: Expandable Polystyrene Beads or Articles, not otherwise specified
Transport Hazard Class: Not classified under normal conditions
Packing Group: Not assigned unless classified as dangerous due to pentane content
Special Precautions: Ventilated packaging, keep away from ignition sources, avoid container rupture due to gas pressure buildup
Labeling Requirements: Conform to OSHA, EU, GHS, and other local requirements for labeling polymer products
Regulatory Status: Not classified as hazardous for most uses; some jurisdictions regulate based on pentane content or flame retardant additives (e.g., HBCD restrictions)
TSCA Inventory: Listed
REACH Status: Registration not required for finished articles; raw materials may require compliance
Other Regulations: RoHS, WEEE, and other product stewardship laws apply depending on use and destination
Worker Protection: Must observe relevant worker exposure and workplace safety regulations
Environment: EU Packaging Waste, U.S. Resource Conservation and Recovery Act (RCRA), and local waste management laws may apply
