Styrene #CAS100-42-5
CAS Number：100-42-5
Chemical Formula:C8H8
Synonyms:
CINNAMENE
Annamene
Cinnamenol
Appearance:Colorless Liquid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Styrene #CAS100-42-5
Styrene is a certain organic chemical compound having the chemical formula C8H8 and structural formula CH2=CHC6H5, also known as styrol, vinylbenzene, phenylethene,phenylethylene,styrene,styreen and so on. Its chemical structure is made up of a benzene ring bonded onto a vinyl group . At room temperature and pressure, styrene is a clear, colorless liquid. Styrene is an important monomer of synthetic rubber, adhesives and plastics, such as styrene sheet.
Styrene has a characteristic, sweet, balsamic, almost floral odor that is extremely penetrating. Styrene occurs naturally in plants. It was first isolated from a resin called storax obtained from the inner bark of the Oriental sweet gum tree (Liquidambar orientalis) by Bonastre. In 1839, the German apothecary Eduard Simon prepared styrene by distilling it from storax and called it styrol. Simon observed it solidifi ed into a rubbery substance after being stored and believed it had oxidized into styrol oxide. Subsequent analysis showed the solid did not contain oxygen and it was renamed metastyrol. This was the first written record of polymerization in chemistry. In 1845, the English chemist, John Blyth, and the German chemist, August Wilhelm von Hofmann (1818 1892), observed that styrene was converted to polystyrene by sunlight and that styrene could be polymerized to polystyrene by heating in the absence of oxygen. It took another 70 years for the polymerization of styrene to be described by Hermann Staudinger (1881 1965) in the 1920s. This laid the foundation for the commercial polystyrene industry that developed in the 1930s.
Application of Styrene
Styrene is an important monomer of synthetic rubber, adhesives and plastics. [3,4,5] It is used for the synthesis of styrene butadiene rubber and polystyrene resin, polyester glass fiber reinforced plastics and coatings. It is used for preparing polystyrene, ion exchange resin, and foam polystyrene. It is also used for copolymerization with other monomers to produce various engineering plastics, such as copolymerization of acrylonitrile and butadiene to produce ABS resin, widely used in various household appliances and industries. Copolymerization with acrylonitrile, obtained SAN is a resin with shock resistance and bright color. The SBS produced by copolymerization with butadiene is a thermoplastic rubber, which is widely used as a polyvinyl chloride and acrylic modifier. SBS and SIS thermoplastic elastomers are made with butadiene and isoprene copolymerization, and as a crosslinking monomer, styrene is used in the modification of PVC, polypropylene, and unsaturated polyester.
Syrene is used as a hard monomer for the production of styrene acrylic emulsion and solvent pressure sensitive adhesive. Emulsion adhesive and paint can be prepared by copolymerization with vinyl acetate and acrylic ester. Styrene is one of the most commonly used vinyl monomers in the scientific field, used in various modified and composite materials.[6]
In addition, a small amount of styrene is also used as perfume and other intermediates. By chloromethylation of styrene, cinnamyl chloride is used as an intermediate for the non anesthetic analgesic strong pain determination, and styrene is also used as an antitussive, expectorant and anticholinergic original medicine in stomach Changning. It can be used to synthesize anthraquinones dye intermediates , pesticide emulsifiers, and styrene phosphonic acids ore dressing agent and copper plating brighteners.
| 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 | n |
| 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) |
| biological source | synthetic |
| Water Solubility | 0.3 g/L (20 ºC) |
| FreezingPoint | -30.6℃ |
| Thermal Conductivity | 0.13 W/(m·K) at 25 ℃ |
| Specific Heat Capacity | Cp(liquid): 1.75 J/(g·K), at 25℃ |
| Sensitive | Air Sensitive |
| Merck | 14,8860 |
| BRN | 1071236 |
| Henry's Law Constant | (x 10-3 atmm3/mol): 3.91 at 25 °C (static headspace-GC, Welke et al., 1998) |
| Dielectric constant | 2.4（25℃） |
| Exposure limits | ACGIH:TLV-TWA 10 ppm; TLV-STEL 20 ppm OSHA:PEL-TWA 100 ppm; PEL-STEL 200 ppm; 600 ppm (Peak) for a single time period up to 5 min in any 3 hours NIOSH:REL-TWA 50 ppm (215 mg/m3); REL-STEL 100 ppm (425 mg/m3) |
| 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 |
| Major Application | environmental |
| Cosmetics Ingredients Functions | SOLVENT |
| InChI | 1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2 |
| InChIKey | PPBRXRYQALVLMV-UHFFFAOYSA-N |
| SMILES | C=Cc1ccccc1 |
| LogP | 2.96 at 25℃ |
| CAS DataBase Reference | 100-42-5(CAS DataBase Reference) |
| NIST Chemistry Reference | Styrene(100-42-5) |
| IARC | 2A (Vol. 60, 82, 121) 2019 |
| 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 |
| OEB | A |
| OEL | TWA: 50 ppm (215 mg/m3), STEL: 100 ppm (425 mg/m3) |
| RIDADR | UN 2055 (STYRENE MONOMER, STABILIZED) |
| WGK Germany | 2 |
| RTECS | WL3675000 |
| Autoignition Temperature | 914 °F |
| TSCA | TSCA listed |
| HS Code | 2902 50 00 |
| HazardClass | 3 |
| PackingGroup | III |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Acute Tox. 4 Inhalation Aquatic Chronic 3 Asp. Tox. 1 Eye Irrit. 2 Flam. Liq. 3 Repr. 2 Skin Irrit. 2 STOT RE 1 Inhalation STOT SE 3 |
| 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. |
| IDLH | 700 ppm |
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