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Benzene Structure

Benzene

Product NameBenzene

CAS71-43-2

CBNumberCB6854153

MFC6H6

MW78.11

EINECS200-753-7

MDL NumberMFCD00003009

MOL File71-43-2.mol

MSDS FileSDS

Chemical Properties

Melting point 5.5 °C (lit.)
Boiling point 80 °C (lit.)
Density  0.874 g/mL at 25 °C (lit.)
vapor density  2.77 (vs air)
vapor pressure  166 mm Hg ( 37.7 °C)
refractive index  n20/D 1.501(lit.)
Flash point 12 °F
storage temp.  room temp
solubility  Miscible with alcohol, chloroform, dichloromethane, diethyl ether, acetone and acetic acid.
pka 43(at 25℃)
form  Liquid
color  APHA: ≤10
Odor Paint-thinner-like odor detectable at 12 ppm
Relative polarity 0.111
explosive limit 1.4-8.0%(V)
Odor Threshold 2.7ppm
Water Solubility  0.18 g/100 mL
λmax λ: 280 nm Amax: 1.0
λ: 290 nm Amax: 0.15
λ: 300 nm Amax: 0.06
λ: 330 nm Amax: 0.02
λ: 350-400 nm Amax: 0.01
Merck  14,1066
BRN  969212
Henry's Law Constant 10.4 at 45.00 °C, 11.4 at 50.00 °C, 13.3 at 55.00 °C, 14.5 at 60.00 °C, 16.8 at 65.00 °C, 19.2 at 70.00 °C (static headspace-GC, Park et al., 2004)
Exposure limits TLV-TWA 10 ppm (~32 mg/m3) (ACGIH and OSHA); ceiling 25 ppm (~80 mg/m3) (OSHA and MSHA); peak 50 ppm (~160 mg/m3)/10 min/8 h (OSHA); carcinogenicity: Suspected Human Carcinogen (ACGIH), Human Sufficient Evidence (IARC).
Stability Stable. Substances to be avoided include strong oxidizing agents, sulfuric acid, nitric acid, halogens. Highly flammable.
InChIKey UHOVQNZJYSORNB-UHFFFAOYSA-N
CAS DataBase Reference 71-43-2(CAS DataBase Reference)
IARC 1 (Vol. 29, Sup 7. 100F, 120) 2018
NIST Chemistry Reference Benzene(71-43-2)
EPA Substance Registry System Benzene (71-43-2)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H225-H304-H315-H319-H340-H350-H372-H412
Precautionary statements P210-P273-P301+P310-P303+P361+P353-P305+P351+P338-P331
Hazard Codes  F,T
Risk Statements  45-46-11-36/38-48/23/24/25-65-39/23/24/25-23/24/25
Safety Statements  53-45-36/37-16-7
RIDADR  UN 1114 3/PG 2
WGK Germany  3
RTECS  CY1400000
3-10
Autoignition Temperature 560 °C
TSCA  Yes
HS Code  2902 20 00
HazardClass  3
PackingGroup  II
Hazardous Substances Data 71-43-2(Hazardous Substances Data)
Toxicity LD50 orally in young adult rats: 3.8 ml/kg (Kimura)
IDLA 500 ppm
NFPA 704:
3
2 0

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