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Styrene Structure

Styrene

  • Product NameStyrene
  • CAS100-42-5
  • CBNumberCB3415111
  • MFC8H8
    Lewis structure
  • MW104.15
  • EINECS202-851-5
  • MDL NumberMFCD00008612
  • MOL File100-42-5.mol
  • MSDS FileSDS

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.)
Flash point 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)
Dielectric constant 2.4(25℃)
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).
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
EPA Primary Drinking Water Standard MCL:0.1,MCLG:0.1
LogP 2.96 at 25℃
Substances Added to Food (formerly EAFUS) STYRENE--NLFG
FDA 21 CFR 175.105; 175.300; 176.180; 177.1010; 177.2600; 178.3790
CAS DataBase Reference 100-42-5(CAS DataBase Reference)
EWG's Food Scores 7-9
FDA UNII 44LJ2U959V
Proposition 65 List Styrene
NIST Chemistry Reference Styrene(100-42-5)
IARC 2A (Vol. 60, 82, 121) 2019
EPA Substance Registry System Styrene (100-42-5)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H226-H304-H315-H319-H332-H335-H361-H372-H412
Precautionary statements P210-P273-P301+P310-P303+P361+P353-P304+P340+P312-P331
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
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
NFPA 704:
3
2 2

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