Styrene CAS#100-42-5
Essential Monomer for Synthetic Materials：Styrene serves as a key monomer in the production of synthetic rubber, adhesives, and plastics.
Versatile Industrial Applications：It is widely used in the manufacture of styrene-based sheets and other polymer products.
Clear and Colorless Liquid：At room temperature, styrene is a stable, transparent liquid, making it easy to handle and process.
Chemical Structure Benefits：The benzene ring bonded to the vinyl group provides desirable properties for polymerization and material performance.
Styrene CAS#100-42-5
Styrene is a widely used chemical compound with the molecular formula C8H8 and the structural formula CH2=CHC6H5. It is also known by names such as styrol, vinylbenzene, phenylethene, phenylethylene, and styreen. Its structure consists of a benzene ring attached to a vinyl group. At room temperature and pressure, styrene is a clear, colorless liquid. It is an essential monomer for the production of synthetic rubber, adhesives, and plastics, including styrene sheets.
Styrene Chemical Properties
Melting point | -31 °C (lit.) |
Boiling point | 145-146 °C (lit.) |
density | 0.906 g/mL at 25 °C |
vapor density | 3.6 (vs air) |
vapor pressure | 12.4 mm Hg ( 37.7 °C) |
refractive index | n20/D 1.546(lit.) |
Fp | 88 °F |
storage temp. | Store at <= 20°C. |
solubility | 0.24g/l |
form | Liquid |
pka | >14 (Schwarzenbach et al., 1993) |
Specific Gravity | 0.909 |
color | Colorless |
Odor | at 0.10 % in triacetin. sweet balsam floral plastic |
Odor Type | balsamic |
Odor Threshold | 0.035ppm |
explosive limit | 1.1-8.9%(V) |
Water Solubility | 0.3 g/L (20 ºC) |
FreezingPoint | -30.6℃ |
Sensitive | Air Sensitive |
Merck | 14,8860 |
BRN | 1071236 |
Henry's Law Constant | (x 10-3 atm?m3/mol): 3.91 at 25 °C (static headspace-GC, Welke et al., 1998) |
Exposure limits | TLV-TWA 50 ppm (～212 mg/m3) (ACGIH and NIOSH), 100 ppm (～425 mg/m3) (OSHA and MSHA); ceiling 200 ppm, peak 600 ppm/5 min/3 h (OSHA); STEL 100 ppm （～425 mg/m3) (ACGIH). |
Dielectric constant | 2.4（25℃） |
Stability: | Stable, but may polymerize upon exposure to light. Normally shipped with a dissolved inhibitor. Substances to be avoided include strong acids, aluminium chloride, strong oxidizing agents, copper, copper alloys, metallic salts, polymerization catalysts and accelerators. Flammable - vapour may travel considerable distance to ignition source |
InChIKey | PPBRXRYQALVLMV-UHFFFAOYSA-N |
LogP | 2.96 at 25℃ |
CAS DataBase Reference | 100-42-5(CAS DataBase Reference) |
IARC | 2A (Vol. 60, 82, 121) 2019 |
NIST Chemistry Reference | Styrene(100-42-5) |
EPA Substance Registry System | Styrene (100-42-5) |
Safety Information
Hazard Codes | Xn,T,F |
Risk Statements | 10-20-36/38-40-36/37/38-39/23/24/25-23/24/25-11-48/20-63 |
Safety Statements | 23-36-26-16-45-36/37-7-46 |
RIDADR | UN 2055 3/PG 3 |
OEB | A |
OEL | TWA: 50 ppm (215 mg/m3), STEL: 100 ppm (425 mg/m3) |
WGK Germany | 2 |
RTECS | WL3675000 |
Autoignition Temperature | 914 °F |
TSCA | Yes |
HS Code | 2902 50 00 |
HazardClass | 3 |
PackingGroup | III |
Hazardous Substances Data | 100-42-5(Hazardous Substances Data) |
Toxicity | LD50 in mice (mg/kg): 660 ± 44.3 i.p.; 90 ± 5.2 i.v. |
IDLA | 700 ppm |
Product Usage of Styrene CAS#100-42-5
Styrene is an essential monomer for the production of synthetic rubber, adhesives, and plastics. It is used in the synthesis of styrene-butadiene rubber (SBR), polystyrene resin, glass fiber-reinforced polyester plastics, and coatings. Styrene is also utilized to produce polystyrene, ion-exchange resins, and foam polystyrene.
It can copolymerize with other monomers to create various engineering plastics. For example, copolymerization with acrylonitrile and butadiene produces ABS resin, widely used in household appliances and industrial products. Copolymerization with acrylonitrile yields SAN resin, which offers impact resistance and bright color. SBS, produced by copolymerization with butadiene, is a thermoplastic rubber commonly used to modify PVC and acrylic materials. SBS and SIS thermoplastic elastomers are created via copolymerization with butadiene and isoprene. Styrene also functions as a crosslinking monomer in PVC, polypropylene, and unsaturated polyester modification.
Styrene is a key monomer in the production of styrene-acrylic emulsions and solvent-based pressure-sensitive adhesives. Emulsion adhesives and paints can be prepared via copolymerization with vinyl acetate and acrylic esters. As one of the most widely used vinyl monomers in the chemical industry, styrene is involved in many modified and composite materials.
Additionally, small quantities of styrene are used as fragrances and chemical intermediates. Through chloromethylation, styrene can produce cinnamyl chloride, an intermediate for non-anesthetic analgesics. It is also employed in pharmaceuticals as an antitussive, expectorant, and anticholinergic agent. Styrene is further used in the synthesis of anthraquinone dye intermediates, pesticide emulsifiers, styrene phosphonic acids, ore dressing agents, and copper plating brighteners.
