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Styrene Monomer
This Product Stewardship Summary provides high level information to the public regarding the product safety of the subject chemical product. This summary is not intended to provide detailed information regarding emergency or medical treatment or detailed environmental and health information. Please refer to AmSty’s Styrene Monomer Safety Data Sheet (SDS) for specific information related to this chemical. Styrene monomer is commercially manufactured in production plants and is used globally as a building block in the production of a variety of plastic and rubber products. Styrene is used as a feedstock to produce polystyrene (PS) primarily but is also used for acrylonitrile-butadiene styrene (ABS), styrene acrylonitrile (SAN), expanded polystyrene, polyester, styrene-butadiene rubber (SBR), and styrene thermoplastic elastomers.
Product Name: Styrene Monomer
Common Names: Styrene monomer (inhibited), Vinylbenzene, Phenylethene, Phenylethylene,
Ethenylbenzene
CAS No.: 100-42-5
EC No.: 202-851-5
EEC Annex I Index No: 601-026-00-0
Styrene-derived products are used in the manufacture of industrial and consumer good applications which are a benefit to society and are recyclable. These end-use applications include the below:
- Appliances
- Automobile components
- Adhesives
- Food packaging
- Medical
- Printer toner
- Paints and inks
- Electronics
- Lubricants
- Carpet backing
- Coatings
- Construction
- Furniture
- Recreational equipment
- Tires
- Toys
Under ambient conditions, styrene is a colorless liquid with a sweet aromatic odor. Its low odor threshold allows it to be easily detected at levels below the occupational exposure limits. Styrene supplied by AmSty is inhibited with tertiary-butylcatechol (TBC), CAS No.98-29-3. If the inhibitor level is not maintained, uncontrolled exothermic polymerization may occur with exposure to heat or direct sunlight. Please refer to the Plastics Europe/Styrene Producers Association Safe Handling Guide for detailed information.
Styrene is classified as a “Hazardous Chemical” as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200 and is classified as a Flammable Liquid, Category 3 under GHS (Globally Harmonized System) classification and labeling.
- Odor threshold: Air: 0.1 ppm
- Relative density: 0.91 (literature)
- Molecular formula: C8-H8
- Molecular weight: 104.14 g/mol
- Melting point/Freezing point: -23.1 °F/ -31.0 °C
- Boiling point: 293 °F/145 °C
- Explosion limits in air: 0.9 - 6.8%vol
- Flash point: 87.8 °F/31.0 °C
- Autoignition temperature: 914 °F/490 °C
- Partition coefficient (n-octanol/water): 2.95
- Vapor Density: 3.6
- Vapor pressure: 0.67 kPa at 68°F/20 °C