Home Categories Organic Chemistry Isopropylbenzene solution
A4972812

Isopropylbenzene solution , analyticalstandard,1000ug/mlinmethanol , 98-82-8

Synonym(s):
Cumene;Isopropylbenzene;Cumene solution;(1-Methylethyl)benzene;2-Phenylpropane

CAS NO.:98-82-8

Empirical Formula: C9H12

Molecular Weight: 120.19

MDL number: MFCD00008881

EINECS: 202-704-5

Update time: 2022-07-08

PRODUCT Properties

Melting point: −96 °C(lit.)
Boiling point: 152-154 °C(lit.)
Density  0.864 g/mL at 25 °C(lit.)
vapor density  4.1 (vs air)
vapor pressure  8 mm Hg ( 20 °C)
refractive index  n20/D 1.491(lit.)
Flash point: 115 °F
storage temp.  2-8°C
solubility  0.05g/l
form  Liquid
pka >14 (Schwarzenbach et al., 1993)
color  Clear colorless
Odor Strong, slightly irritant; fragrant; aromatic.
Odor Threshold 0.0084ppm
explosive limit 0.8-6.0%(V)
Water Solubility  Soluble in alcohol, ether, acetone, benzene, carbon tetrachloride. Insoluble in water.
Merck  14,2617
BRN  1236613
Henry's Law Constant 13.0, 15.3, and 23.9 at 28.0, 35.0, and 46.1 °C, respectively (headspace method, Hansen et al., 1993)
Exposure limits Flammable liquid; flash point (closed cup) 36°C (97°F) (NFPA 1986), 39°C (102°F) (Merck 1996), 35.5°C (96°F) (Meyer 1989); vapor pressure 8 torr at 20°C (68°F); vapor density 4.1 (air=1); the vapor is heavier than air and may travel a considerable distance to a nearby ignition source and flash back; autoignition temperature 425°C (797°F); fire- extinguishing agent: dry chemical, foam, or CO2; use a water spray to keep fire- exposed containers cool and to disperse the vapors。
Cumene forms explosive mixtures in the air within the range 0.9–6.5% by volume in air. Cumene may form peroxide on prolonged exposure to air. It should be tested for peroxides before it is subjected to distillation or evaporation。.
Dielectric constant 2.4(20℃)
Stability: Stable, but may form peroxides in storage if in contact with the air. Test for the presence of peroxides before heating or distilling. Combustible. Incompatible with strong oxidizing agents.
InChIKey RWGFKTVRMDUZSP-UHFFFAOYSA-N
LogP 3.55 at 20℃

Description and Uses

Cumene is a common name for isopropylbenzene, an organic compound. Cumene is a volatile colorless liquid at room temperature with a characteristic sharp, penetrating, aromatic odor. It is insoluble in water but is soluble in alcohol and many other organic solvents. Cumene is structurally a member of the alkyl aromatic family of hydrocarbons, which also includes toluene (methylbenzene) and ethylbenzene.Cumene can be found in crude oil, refined fuels, and is a part of processed highoctane gasoline.
Cumene is manufactured by reacting benzene with propylene at elevated temperature and pressure in the presence of a catalyst. It is considered an environmental pollutant because it is a natural component of petroleum and is present in tobacco smoke. Cumene vapor can be absorbed by the respiratory tract. Sufficiently high levels of exposure to cumene causes central nervous system (CNS) depression leading to death, internal bleeding of numerous organs, as well as irritation of the eyes and respiratory system, skin, and mucous membranes. Cumene is a high production volume chemical.

Around 98% of cumene is used in the production of phenol and its coproduct, acetone, using cumene hydroperoxide as chemical intermediate. However, the demand for cumene is largely dependent on the performance of phenol’s derivatives, which have resulted in healthy growth rates in demand for cumene. It is also used as a starting material in the production of acetophenone, α-methylstyrene, diisopropylbenzene, and dicumylperoxide. Cumene is used as a thinner for paints, lacquers, and enamels. It is also used in the manufacture of acetophenone, methylstyrene, and other chemicals commonly found in home cleaning products. Minor uses of cumene include as a constituent of some petroleum-based solvents, such as naphtha; in gasoline blending diesel fuel and highoctane aviation fuel; and as a raw material for peroxides and oxidation catalysts such as polymerization catalysts for acrylic and polyester-type resins. It is also a good solvent for fats and resins and has been suggested as a replacement for benzene in many of its industrial applications.

Safety

Symbol(GHS) 
GHS02,GHS07,GHS08,GHS09
Signal word  Danger
Hazard statements  H226-H304-H335-H411
Precautionary statements  P210-P233-P240-P273-P301+P310-P331
Hazard Codes  Xn,N,T,F
Risk Statements  10-37-51/53-65-39/23/24/25-23/24/25-11
Safety Statements  24-37-61-62-45-36/37-16
RIDADR  UN 1918 3/PG 3
OEB A
OEL TWA: 50 ppm (245 mg/m3) [skin]
WGK Germany  1
RTECS  GR8575000
10
Autoignition Temperature 797 °F
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29027000
Toxicity LD50 orally in rats: 2.91 g/kg (Smyth)
IDLA 900 ppm [10% LEL]

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