Expandable Polystyrene (EPS) CAS#9003-67-2
High Stability & Physical Property
EPS features lightweight, low density and excellent thermal insulation performance. It is insoluble in water, with good water resistance and stable physical properties. It shows fine compatibility with common packaging and building auxiliary materials.
Stable Performance
This material possesses outstanding weather resistance and ageing resistance under normal temperature. It maintains stable structure after long-term storage, not easy to deform or deteriorate, and is non-hygroscopic for easy storage and transportation.
Versatile Uses
Widely used in packaging shockproof materials, building thermal insulation boards, filling insulation materials, floating materials and civil lightweight products. It is also applied in industrial buffer packaging, construction insulation and daily lightweight fillers.
Granular Form & Non-toxic Nature
It appears as white translucent spherical particles, odorless and non-toxic. With unique expandable characteristics, it can be foamed and molded under heating; sealed storage is required, away from high temperature and open flame.
Expandable Polystyrene, with molecular formula (C8H8)n, is white spherical expandable resin particles. It is insoluble in water, low in density and high in foaming ratio. It has good heat insulation, shock absorption, sound insulation and buffering properties. As a common polymer foam material, it is widely foamed into various finished products for construction and packaging industries.
EPS Chemical Properties
| Item | Specification |
|---|---|
| Melting point | 240 °C (lit.) |
| Density | 1.05 g/cm³ (raw particle) |
| Vapor density | N/A |
| Refractive index | 1.59–1.60 |
| Storage temp | Store below +30°C, dry and ventilated |
| Solubility | Insoluble in water; soluble in aromatic hydrocarbons |
| Form | Spherical particles |
| Color | White translucent |
| Odor | Odorless |
| pH | 6.0–7.0 |
| Water Solubility | Insoluble |
| Sensitivity | Heat sensitive |
| Stability | Stable at room temperature; incompatible with strong oxidants |
| CAS DataBase Reference | 9003-67-2 |
| NIST Chemistry Reference | Expandable Polystyrene (9003-67-2) |
| EPA Substance Registry System | Polystyrene, expandable |
Safety Information
| Item | Specification |
|---|---|
| Hazard Codes | F |
| Risk Statements | 11 |
| Safety Statements | 16-22-24/25 |
| WGK Germany | 1 |
| RTECS | WL9750000 |
| TSCA | Yes |
| HS Code | 39031100 |
| UN Number | UN 1993 |
This product is a special polystyrene material containing foaming agent. It can be expanded and molded to produce lightweight foam products with excellent shockproof, heat preservation and sound insulation effects. It is the core raw material for packaging buffers, construction thermal insulation, floating engineering and industrial lightweight materials, with large consumption and wide industrial coverage.
