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A1302712

Benzene , anhydrous,99.8% , 71-43-2

Synonym(s):
Benzene;Benzene in dimethyl sulfoxide;Benzene solution;Benzine;Benzol

CAS NO.:71-43-2

Empirical Formula: C6H6

Molecular Weight: 78.11

MDL number: MFCD00003009

EINECS: 200-753-7

Update time: 2022-07-08

PRODUCT 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
Relative polarity 0.111
Odor Paint-thinner-like odor detectable at 12 ppm
Odor Threshold 2.7ppm
explosive limit 1.4-8.0%(V)
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).
Dielectric constant 2.3(20℃)
Stability: Stable. Substances to be avoided include strong oxidizing agents, sulfuric acid, nitric acid, halogens. Highly flammable.
InChIKey UHOVQNZJYSORNB-UHFFFAOYSA-N
LogP 2.130
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)

Description and Uses

Benzene is a colorless, volatile, highly flammable liquid that is used extensively in the chemical industry and received wide interest in the early days of organic chemistry.

Because of its structure, benzene is a very stable organic compound. It does not readily undergo addition reactions. Addition reactions involving benzene require high temperature, pressure, and special catalysts. The most common reactions involving benzene involve substitution reactions. Numerous atoms and groups of atoms may replace a hydrogen atom or several hydrogen atoms in benzene. Th ree important types of substitution reactions involving benzene are alkylation, halogenation, and nitration. In alkylation, an alkyl group or groups substitute for hydrogen(s).

Benzene is also converted to cyclohexane, which is used to produce nylon and synthetic fibers.

Safety

Symbol(GHS) 
GHS02,GHS07,GHS08
Signal word  Danger
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
OEB E
OEL TWA: 0.1 ppm, STEL: 1 ppm
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

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