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CUMENE

Overview Production Uses Environmental Effects Safety Information
CUMENE
CUMENE structure
CAS No.
98-82-8
Chemical Name:
CUMENE
Synonyms
CUMOL;Cumeen;CUMENE;NSC 8776;Cumene,99%;Cumene (I);CuMene 98%;Cumene, 99.9%;2-Fenilpropano;CUMENE,REAGENT
CBNumber:
CB2191522
Molecular Formula:
C9H12
Formula Weight:
120.19
MOL File:
98-82-8.mol

CUMENE 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.
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。.
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
CAS DataBase Reference
98-82-8(CAS DataBase Reference)
NIST Chemistry Reference
Benzene, (1-methylethyl)-(98-82-8)
EPA Substance Registry System
Benzene, (1-methylethyl)-(98-82-8)
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS02,GHS06,GHS08,GHS07,GHS09
Signal word  Danger
Hazard statements  H302-H320-H336-H351-H401-H225-H301+H311+H331-H370-H226-H304-H335-H411
Precautionary statements  P201-P202-P233-P240-P241+P242+P243-P264-P270-P271-P301+P310+P331+P330-P303+P361+P353-P304+P340+P312-P305+P351+P338+P337+P313-P307+P311-P391-P210-P260-P280-P301+P310-P311-P331-P370+P378-P261-P273-P301+P310a-P405-P501a
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
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)

NFPA 704

Diamond Hazard Value Description
3
2
1
Health   2 Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury (e.g. diethyl ether, ammonium phosphate, iodine)
Flammability   3 Liquids and solids (including finely divided suspended solids) that can be ignited under almost all ambient temperature conditions . Liquids having a flash point below 22.8 °C (73 °F) and having a boiling point at or above 37.8 °C (100 °F) or having a flash point between 22.8 and 37.8 °C (73 and 100 °F). (e.g. gasoline, acetone)
Instability  
Special   1

(NFPA, 2010)

CUMENE price More Price(14)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1151709 Cumene United States Pharmacopeia (USP) Reference Standard 98-82-8 3x1.2ml $348 2018-11-13 Buy
Sigma-Aldrich 1601394 Residual Solvent Class 2 - Cumene United States Pharmacopeia (USP) Reference Standard 98-82-8 3x1.2ml $348 2018-11-13 Buy
TCI Chemical C0687 Cumene >99.0%(GC) 98-82-8 25mL $14 2018-11-22 Buy
TCI Chemical C0687 Cumene >99.0%(GC) 98-82-8 500mL $20 2018-11-22 Buy
Alfa Aesar A11864 Cumene, 99% 98-82-8 250ml $15.7 2018-11-13 Buy

CUMENE Chemical Properties,Uses,Production

Overview

Also known as 2-phenylpropane, Isopropylbenzene, or 1-methyl ethyl benzene, cumene is an aromatic hydrocarbon that is volatile, colorless liquid and has a smell similar to gasoline. Cumene is a natural component of crude oil, coal tar, and can be utilized as a blending component in gasoline. The compound is commonly found in Ceylan cinnamon and is a trace ingredient of ginger oil.

Production

Isopropylbenzene can be generated by alkylation or reacting benzene and propylene in the presence of an acid catalyst (1). Most of the modern plants that produce cumene use phosphoric acid as a catalyst, while some use a Friedel-Crafts reaction with aluminum trichloride (1). The reactions involved in the production of cumene from benzene and propylene are as follows:
C3H6 + C6H6 = C6H5-C3H7
The catalytic process that is usually optimized at 25 atm. and 350oC is the best technology for the production of isopropylbenzene

Uses

Industrial Use
Cumene is utilized in the production of phenol or its product, acetone that is widely used in the manufacture of plastics and petroleum products. It is also used in the production of methyl styrene and acetophenone as well as a thinner in lacquers, paints, and enamels. In addition, the compound is used as a solvent in the manufacture of iron, rubber, and steel as well as paper and pulp.
Pharmaceutical Use
Cumene hydroperoxide produces oxidative stress in the various steps of protein synthesis. Cumene hydroperoxide is used to probe isoenzyme specificity as well as region-and stereoselectivity.

Environmental Effects

Cumene vaporizes when released into the air where it is immediately reacted into other chemicals. However, in soil and water, bacteria degrade the chemical. Industrial emissions of the compound can lead to elevated concentrations in the atmosphere around the source.

Safety Information

Primarily, humans are exposed to cumene at industrial workplaces that use or produce the compound (2). However, reports have indicated low exposure concentrations during the production of cumene. On the other hand, succeeding reactions of the compound may occur in closed systems.
Employers and workers must follow safe handling practices that are often found in the Manufacturer's Safety Data Sheet to enhance employee safety. Inhalation exposure to the chemical may cause drowsiness, dizziness, headaches, unconsciousness, and slight incoordination. It is an irritant when exposed to the skin and eye.
As such, workers should wear protective clothing, gloves, respirators, and safety goggles. Furthermore, workplaces that cumene is being handled or produced should be well-ventilated to minimize the potential for employee exposure.

Chemical Properties

cumene is oxidized to its hydroperoxide, which is used to produce propene oxide. The alcohol produced is subsequently converted back to cumene over a copper-chromium oxide catalyst to be reused in the process. The advantage of this process is that cumene is easier to hydroperoxidate (more stable).

Chemical Properties

Cumene is a colorless liquid. Sharp, penetrating, aromatic odor, like gasoline.

Physical properties

Colorless liquid with an aromatic odor. Experimentally determined detection and recognition odor threshold concentrations were 40 μg/m3 (8 ppbv) and 230 μg/m3 (47 ppbv), respectively (Hellman and Small, 1974). The taste threshold concentration in water is 60 ppb (Young et al., 1996).

Uses

It is used as a solvent and in the productionof phenol, acetone, and acetophenone.

Uses

Raw Material for Phenol, Acetone and Alpha Methyl Styrene production, intermediate for argochemicals

Uses

Production of phenol, acetone, and α- methylstyrene; solvent.

Air & Water Reactions

Flammable. Insoluble in water.

Reactivity Profile

Mixing CUMENE in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: chlorosulfonic acid, nitric acid, oleum, NFPA 1991.

Hazard

Toxic by ingestion, inhalation, and skin absorption; a narcotic. Moderate fire risk. Eye, skin, and upper respiratory tract irritant, and central nervous system impairment. Possible carcinogen.

Health Hazard

Cumene is an irritant to the eyes, skin, andupper respiratory system, and a low acutetoxicant. It is narcotic at high concentrations.The narcotic effect is induced slowly andis of longer duration relative to benzeneand toluene (ACGIH 1986). Although thetoxicity may be of same order, the hazardfrom inhalation is low due to its high boilingpoint and low vapor pressure. An exposureto 8000 ppm for 4 hours was lethal to rats.The oral toxicity of cumene was determinedto be low in animals. In addition to narcosis, itcaused gastritis. An LD50 value documentedfor mice is 1400 mg/kg (NIOSH 1986).
Chronic inhalation toxicity of cumene wasvery low in animals. Repeated exposurescaused congestion in the lungs, liver, andkidney and an increase in the kidney weight.A major portion of cumene absorbed into the body is metabolized in the liver andexcreted. The urinary metabolites constitutedconjugated alcohols or acids.

Health Hazard

Narcotic action with long-lasting effects; depressant to central nervous system. Acute (short-term) inhalation exposure to cumene may cause headaches, dizziness, drowsiness, slight incoordination, and unconsciousness in humans. Cumene has a potent central nervous system (CNS) depressant action characterized by a slow induction period and long duration of narcotic effects in animals. Cumene is a skin and eye irritant. No information is available on the chronic (long-term), reproductive, developmental, or carcinogenic effects of cumene in humans. Animal studies have reported increased liver, kidney, and adrenal weights from inhalation exposure to cumene. EPA has classified cumene as a Group D, not classifiable as to human carcinogenicity.

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Chemical Reactivity

Reactivity with Water: No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Safety Profile

Moderately toxic by ingestion. Mdly toxic by inhalation and skincontact. Human systemic effects by inhalation: an antipsychotic, unspecified changes in the sense of smell and respiratory system. An eye and skin irritant. Potential narcotic action. Central nervous system depressant. There is no apparent difference between the toxicity of natural cumene and that derived from petroleum. See also BENZENE and TOLUENE. Flammable liquid when exposed to heat or flame; can react with oxidizing materials. Violent reaction with HNO3, oleum, chlorosulfonic acid. To fight fKe, use foam, CO2, dry chemical.

Potential Exposure

Cumene is used primarily in the manufacture acetone and phenol which are widely used as solvents for paints, laquers, and varnishes and to make plastics. Cumene is used in gasoline blending and as a high-octane gasoline component. It is also found as a component in tobacco smoke.

Potential Exposure

Cumene is a constituent of crude oil and finished fuels.  It is released to the environment as a result of its production and processing from petroleum refining, the evaporation and combustion of petroleum products, and by the use of a variety of products containing cumene.
The most probable route of human exposure is by the inhalation of contaminated air from the evaporation of petroleum products.
Exposure may also occur through the consumption of contaminated food or water.

Source

As of October 1995, no MCLGs or MCLs have been proposed although isopropylbenzene has been listed for regulation (U.S. EPA, 1996). A DWEL of 400 μg/L was recommended (U.S. EPA, 2000).
Detected in distilled water-soluble fractions of 94 octane gasoline and Gasohol at concentrations of 0.14 and 0.15 mg/L, respectively (Potter, 1996).
Thomas and Delfino (1991) equilibrated contaminant-free groundwater collected from Gainesville, FL with individual fractions of three individual petroleum products at 24–25 °C for 24 h. The aqueous phase was analyzed for organic compounds via U.S. EPA approved test method 602. Average isopropylbenzene concentrations reported in water-soluble fractions of unleaded gasoline and kerosene were 235 and 28 μg/L, respectively. When the authors analyzed the aqueous-phase via U.S. EPA approved test method 610, average isopropylbenzene concentrations in water-soluble fractions of unleaded gasoline and kerosene were lower, i.e., 206 and 22 μg/L, respectively. Isopropylbenzene was detected in both water-soluble fractions of diesel fuel but were not quantified.
Isopropylbenzene was detected in California Phase II reformulated gasoline at a concentration of 830 mg/kg (Schauer et al., 2002).
Isopropylbenzene naturally occurs in Ceylon cinnamon, cumin, and ginger (1 ppm in rhizome) (Duke, 1992).

Environmental Fate

ological. When isopropylbenzene was incubated with Pseudomonas putida, the substrate was converted to ortho-dihydroxy compounds in which the isopropyl part of the compound remained intact (Gibson, 1968). Oxidation of isopropylbenzene by Pseudomonas desmolytica S44B1 and Pseudomonas convexa S107B1 yielded 3-isopropylcatechol and a ring fission product, (+)-2- hydroxy-7-methyl-6-oxooctanoic acid (Jigami et al., 1975).
Surface Water. Mackay and Wolkoff (1973) estimated an evaporation half-life of 14.2 min from a surface water body that is 25 °C and 1 m deep.
Photolytic. Major products reported from the photooxidation of isopropylbenzene with nitrogen oxides include nitric acid and benzaldehyde (Altshuller, 1983). A n-hexane solution containing isopropylbenzene and spread as a thin film (4 mm) on cold water (10 °C) was irradiated by a mercury medium pressure lamp. In 3 h, 22% of the applied isopropylbenzene photooxidized into α,α-dimethylbenzyl alcohol, 2-phenylpropionaldehyde, and allylbenzene (Moza and Feicht, 1989).
A rate constant of 3.7 x 109 L/molecule·sec was reported for the reaction of isopropylbenzene with OH radicals in the gas phase (Darnall et al., 1976). Similarly, a room temperature rate constant of 6.6 x 10-12 cm3/molecule·sec was reported for the vapor-phase reaction of isopropylbenzene with OH radicals (Atkinson, 1985). At 25 °C, a rate constant of 6.25 x 10-12 cm3/molecule·sec was reported for the same reaction (Ohta and Ohyama, 1985). Chemical/Physical. Complete combustion in air yields carbon dioxide and water vapor. Isopropylbenzene will not hydrolyze because it does not contain a hydrolyzable functional group.
The calculated evaporation half-life of isopropylbenzene from surface water 1 m deep at 25 °C is 5.79 h (Mackay and Leinonen, 1975).

Shipping

UN1918 Cumene, Hazard Class: 3; Labels: 3-Flammable liquid

Incompatibilities

Vapor may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, 942 Cumene fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Air contact forms cumene hydroperoxide. Attacks rubber. May accumulate static electrical charges, and may cause ignition of its vapors.

Waste Disposal

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

CUMENE Preparation Products And Raw materials

Raw materials

Preparation Products


CUMENE Suppliers

Global( 166)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shenzhen Sendi Biotechnology Co.Ltd.
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Mainchem Co., Ltd.
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View Lastest Price from CUMENE manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-21 CUMENE
98-82-8
US $1.00 / kg 1g 99% 100KG career henan chemical co
2018-12-21 CUMENE
98-82-8
US $1.00 / kg 1g 99% 100KG career henan chemical co

CUMENE Spectrum


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