Styrene CAS #100-42-5

CAS Number: 100-42-5
Chemical Formula: C₈H₈
Synonyms:

Ethenylbenzene
STYROL

Appearance: Colorless liquid
HS Code: 2902 50 00
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Products Description of Styrene CAS #100-42-5

Styrene is an organic compound formed by replacing one hydrogen atom of ethylene with benzene. The electrons of the vinyl group are conjugated with the benzene ring. It is a kind of aromatic hydrocarbon. The molecular formula is C8H8, and the structural formula is C6H5CH=CH2. It exists in storax (a natural fragrance). It is a colorless oily liquid with a special aroma. The melting point is -30.6℃, the boiling point is 145.2℃, the relative density is 0.9060 (20/4℃), the refractive index is 1.5469Chemicalbook, and the viscosity is 0.762cPat68°F. It is insoluble in water, but soluble in ethanol and ether. It gradually polymerizes and oxidizes when exposed to air. It needs to add an inhibitor [hydroquinone or tert-butyl catechol (0.0002%~0.002%) as a stabilizer to delay its polymerization] before it can be stored. In industry, it is an important monomer for synthetic resins, ion exchange resins, and synthetic rubber. Styrene can also undergo addition reactions unique to olefins.

Parameters

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
biological source	synthetic
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	2.4300000000000002
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)
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
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