alpha-methyl styrene

(1-methylethenyl)benzene

CAS: 98-83-9 C9 H10 MW: 118.17870000

Identification

Namealpha-methyl styrene
IUPACprop-1-en-2-ylbenzene
CAS Number98-83-9
EINECS202-705-0
FDA UNIID46R9753IK
Molecular FormulaC9 H10
Molecular Weight118.17870000
MDL NumberMFCD00008859
Nikkaji NumberJ3.582C
Beilstein0969405
XlogP33.50 (est)

Regulatory

DG SANTE Food Contact Materials(1-methylethenyl)benzene
FDA Mainterm (IAUFC)98-83-9 ; ALPHA-METHYLSTYRENE

Physical Properties

Appearance colorless clear liquid (est)
Assay 97.00 to 100.00
Food Chemicals Codex Listed No
Specific Gravity 0.90900 to 0.91300 @ 20.00 °C.
Pounds per Gallon - (est). 7.573 to 7.606
Refractive Index 1.53700 to 1.54000 @ 20.00 °C.
Melting Point -24.00 °C. @ 760.00 mm Hg
Boiling Point 164.00 to 166.00 °C. @ 760.00 mm Hg
Vapor Pressure 2.827000 mmHg @ 25.00 °C. (est)
Vapor Density 4.1 ( Air = 1 )
Flash Point 114.00 °F. TCC ( 45.56 °C. )
logP (o/w) 3.480
Soluble in alcohol
Insoluble in water

No sensory data available

Safety Information

Preferred SDSView
European informationMost important hazard(s):
Oral/Parenteral Toxicityoral-rat LD50 4600 mg/kg
Dermal Toxicityskin-rabbit LD50 16 ml/kg
Inhalation Toxicityinhalation-guinea pig LCLo 3000 ppm

GHS Classification

['GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)', 'GHS Label elements, including precautionary statements']

Safety in Use

Categoryindirect food additives: adhesives and components of coatings
Recommendation for alpha-methyl styrene usage levels up tonot for fragrance use.
Recommendation for alpha-methyl styrene flavor usage levels up tonot for flavor use.

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Potential Uses

None Found

Natural Occurrence

not found in nature

Synonyms

benzene, (1-methylethenyl)- (1- methyl ethenyl) benzene 1- methyl ethylene benzene a- methyl styrene alpha- methyl styrol 1- methyl-1-phenyl ethene 1- methyl-1-phenyl ethylene 1- methyl-1-phenylethene 1- methyl-1-phenylethylene (1- methylethenyl)benzene 1- methylethenylbenzene 1- methylethylenebenzene a- methylstyrene alpha- methylstyrene a- methylstyrol (1- methylvinyl)benzene 2- phenyl propene 2- phenyl propylene 1- phenyl-1-methylethylene 2- phenyl-1-propene 2- phenyl-2-propene 2- phenylpropene 2- phenylpropylene prop-1-en-2-ylbenzene 1- propene, 2-phenyl- iso propenyl benzene iso propenylbenzene iso propenylbenzol styrene, a-methyl- PubMed: Spectroscopic [FT-IR and FT-Raman] and theoretical [UV-Visible and NMR] analysis on α-Methylstyrene by DFT calculations. PubMed: Selective separation of fluorinated compounds from complex organic mixtures by pyrolysis-comprehensive two-dimensional gas chromatography coupled to high-resolution time-of-flight mass spectrometry. PubMed: A study of photothermal laser ablation of various polymers on microsecond time scales. PubMed: A computational exploration of imprinted polymer affinity based on voriconazole metabolites. PubMed: Highly diastereoselective cyclopropanation of α-methylstyrene catalysed by a C2-symmetrical chiral iron porphyrin complex. PubMed: Revelation of the photoactive species in the photocatalytic dimerization of α-methylstyrene by a dinuclear ruthenium-palladium complex. PubMed: H(OEt2)2[P(1,2-O2C6Cl4)3]: synthesis, characterization, and application as a single-component initiator for the carbocationic polymerization of olefins. PubMed: Manganese(III) acetate-mediated oxidative cyclization of a-methylstyrene and trans-stilbene with b-ketosulfones. PubMed: Reactions of the tetraoxidosulfate(˙-) and hydroxyl radicals with poly(sodium α-methylstyrene sulfonate). PubMed: Pyrolysis of waste plastic crusts of televisions. PubMed: Monomer- and polymer radicals of vinyl compounds: EPR and DFT studies of geometric and electronic structures in the adsorbed state. PubMed: Procedure for fabricating biofunctional nanofibers. PubMed: Synthesis of Block Copolymers of Varying Architecture Through Suppression of Transesterification during Coordinated Anionic Ring Opening Polymerization. PubMed: Ru-catalyzed β-selective and enantioselective addition of amines to styrenes initiated by direct arene-exchange. PubMed: A concise synthesis of 3-(1-alkenyl)isoindolin-1-ones and 5-(1-alkenyl)pyrrol-2-ones by the intermolecular coupling reactions of N-acyliminium ions with unactivated olefins. PubMed: Biodegradation and In Vitro Biocompatibility of Polyperoxides: Alternating Co-Polymers of Vinyl Monomers and Molecular Oxygen. PubMed: Enhanced photocatalytic activity of α-methylstyrene oligomerization through effective metal-to-ligand charge-transfer localization on the bridging ligand. PubMed: Surface-directed spinodal decomposition of solvent-quenched organic transistor blends. PubMed: Zone-refinement effect in small molecule-polymer blend semiconductors for organic thin-film transistors. PubMed: Rhenium hydride/boron Lewis acid cocatalysis of alkene hydrogenations: activities comparable to those of precious metal systems. PubMed: Reversible Morphology Control in Block Copolymer Films via Solvent Vapor Processing: An In Situ GISAXS study. PubMed: Disposition and metabolism of cumene in F344 rats and B6C3F1 mice. PubMed: Effect of molecular structure on epoxidation of allylic olefins by atomic oxygen on Au. PubMed: Polymer screening by radiofrequency glow discharge time-of-flight mass spectrometry. PubMed: Solarylations via 4-aminophenyl cations. PubMed: Four mu4-oxo-bridged copper(II) complexes: magnetic properties and catalytic applications in liquid phase partial oxidation reactions. PubMed: Selective area control of self-assembled pattern architecture using a lithographically patternable block copolymer. PubMed: A phenomenological one-parameter equation of state for osmotic pressures of PEG and other neutral flexible polymers in good solvents. PubMed: Oligomerization of styrenes mediated by cationic allyl nickel complexes containing triphenylstibine or triphenylarsine. PubMed: Control of self-assembly of lithographically patternable block copolymer films. PubMed: Alkaline reforming of brominated fire-retardant plastics: fate of bromine and antimony. PubMed: Low temperature conversion (LTC)--an alternative method to treat sludge generated in an industrial wastewater treatment station--batch and continuous process comparison. PubMed: Structure and properties of small molecule-polymer blend semiconductors for organic thin film transistors. PubMed: MALDI-TOF/TOF CID study of poly(alpha-methylstyrene) fragmentation reactions. PubMed: Toxicology and carcinogenesis studies of alpha-methylstyrene (Cas No. 98-83-9) in F344/N rats and B6C3F1 mice (inhalation studies). PubMed: 9-Borabicyclo[3.3.2]decanes and the asymmetric hydroboration of 1,1-disubstituted alkenes. PubMed: Complex macromolecular chimeras. PubMed: Calorimetric evaluation of polymerization thermokinetics of styrene, alpha-methylstyrene and trans-beta-methylstyrene. PubMed: Tandem mass spectrometry characteristics of silver-cationized polystyrenes: internal energy, size, and chain end versus backbone substituent effects. PubMed: Mechanistic studies of copper(I)-catalyzed allylic amination. PubMed: AFM, ellipsometry, XPS and TEM on ultra-thin oxide/polymer nanocomposite layers in organic thin film transistors. PubMed: Nanoconfinement revealed in degradation and relaxation studies of two structurally different polystyrene-clay systems. PubMed: Pyrolysis of waste electrical and electronic equipment: effect of antinomy trioxide on the pyrolysis of styrenic polymers. PubMed: Reactions of cumene hydroperoxide mixed with sodium hydroxide. PubMed: Synthesis of Pd complexes combined with photosensitizing of a ruthenium(II) polypyridyl moiety through a series of substituted bipyrimidine bridges. Substituent effect of the bridging ligand on the photocatalytic dimerization of alpha-methylstyrene. PubMed: Adsorption geometry and core excitation spectra of three phenylpropene isomers on Cu(111). PubMed: Interception of the radicals produced in electrophilic fluorination with radical traps (Tempo, Dmpo) studied by electrospray ionization mass spectrometry. PubMed: Air-assisted addition of grignard reagents to olefins. A simple protocol for a three-component coupling process yielding alcohols. PubMed: Critical influence of adsorption geometry in the heterogeneous epoxidation of "allylic" alkenes: structure and reactivity of three phenylpropene isomers on Cu(111). PubMed: Highly selective photo-catalytic dimerization of alpha-methylstyrene by a novel palladium complex with photosensitizing ruthenium(II) polypyridyl moiety. PubMed: Synthesis of functionalized asymmetric star polymers containing conductive polyacetylene segments by living anionic polymerization. PubMed: Preparation of monomodal polyelectrolyte complex nanoparticles of PDADMAC/poly(maleic acid-alt-alpha-methylstyrene) by consecutive centrifugation. PubMed: Self-supported heterogeneous titanium catalysts for enantioselective carbonyl-ene and sulfoxidation reactions. PubMed: Functional MRI and NMR spectroscopy of an operating gas-liquid-solid catalytic reactor. PubMed: Relative ototoxicity of 21 aromatic solvents. PubMed: Needlelike and spherical polyelectrolyte complex nanoparticles of poly(l-lysine) and copolymers of maleic acid. PubMed: Combined X-ray photoelectron spectroscopy and time-of-flight secondary ion MS surface quantitative analysis of polymer blends with varying mixing thermodynamics. PubMed: Dynamics of living polymers. PubMed: Cumene oxidation by cis-[RuIV(bpy)2(py)(O)]2+, revisited. PubMed: Preparation and adsorption of refined polyelectrolyte complex nanoparticles. PubMed: Quantitative characterization of a polystyrene/poly(alpha-methylstyrene) blend by MALDI mass spectrometry and size-exclusion chromatography. PubMed: The NMR microimaging studies of the interplay of mass transport and chemical reaction in porous media. PubMed: The ultrasensitivity of living polymers. PubMed: Imino ene reaction catalyzed by ytterbium(III) triflate and TMSCl or TMSOTf. PubMed: Kinetics of MTO-catalyzed olefin epoxidation in ambient temperature ionic liquids: UV/Vis and 2H NMR study. PubMed: Isolation and structure of [HC[CH(SiMe(3))(SnMe(3))](2)](+): a remarkably stable sec-alkyl cation. PubMed: NMR imaging of the distribution of the liquid phase in a catalyst pellet during alpha-methylstyrene evaporation accompanied by its vapor-phase hydrogenation. PubMed: Catalytically active, recyclable zirconocene supported at cross-links within porous polymer disks. PubMed: Reversible polymerizations and aggregations. PubMed: Cationic complexes of iridium: diiodobenzene chelation, electrophilic behavior with olefins, and fluxionality of an Ir(I) ethylene complex. PubMed: Copper(I)-homoscorpionate catalysts for the preferential, kinetically controlled cis cyclopropanation of alpha-olefins with ethyl diazoacetate. PubMed: Orientation of alpha-helical poly(L-lysine) in consecutively adsorbed polyelectrolyte multilayers on texturized silicon substrates. PubMed: Use of aromatic radical-anions in the absence of THF. Tandem formation and cyclization of benzyllithiums derived from the attack of homo- and bishomoallyllithiums on alpha-methylstyrenes: two-pot synthesis of cuparene. PubMed: Poly(ethylene glycol)-supported bisoxazolines as ligands for catalytic enantioselective synthesis. PubMed: Thermodynamic suppression of Brownian motion. PubMed: Metabolism and disposition of alpha-methylstyrene in rats. PubMed: Wetting in a phase separating polymer blend film: quench depth dependence PubMed: Direct evidence of a radical mechanism in the addition reaction of iododifluoroesters to olefins by spin trapping PubMed: Ytterbium(III) triflate/TMSCI: efficient catalyst for imino ene reaction PubMed: [Microbial degradation of components of waste water from phenol-producing industry]. PubMed: Polymeric microcapsules of alachlor and metolachlor: preparation and evaluation of controlled-release properties. PubMed: The essential oil of Senecio graveolens (Compositae): chemical composition and antimicrobial activity tests. PubMed: Characterization of inhaled alpha-methylstyrene vapor toxicity for B6C3F1 mice and F344 rats. PubMed: Exploiting methyl groups as motional labels for structure analysis in solid polymers. PubMed: Analysis of Photoablation Products Resulting from Polymer Materials by Supersonic Beam/Multiphoton Ionization/Time-of-Flight Mass Spectrometry. PubMed: Synthesis and 5HT modulating activity of stereoisomers of 3-phenoxymethyl-4-phenylpiperidines. PubMed: Expoxidation of styrene and substituted styrenes by whole cells of Mycobacterium sp. M156. PubMed: The rabbit liver microsomal biotransformation of 1,1-dialkylethylenes: enantioface selection of epoxidation and enantioselectivity of epoxide hydrolysis. PubMed: Microbial bioconversion of pollutants. PubMed: [Determination of volatile substances and leachable components in polystyrene food contact wares]. PubMed: Quantification of volatile solvents in blood by static headspace analysis. PubMed: [Peripheral metabolism of Pseudomonal putida transconjugants degrading chloro- and methylaromatic compounds]. PubMed: [The primary stages of alpha-methylstyrene degradation by a culture of Pseudomonas aeruginosa 8]. PubMed: Effect of styrene and other alkyl benzene derivatives on oxidation of FAD- and NAD-linked substrates in rat liver mitochondria. PubMed: [Degradation of alpha-methylstyrene and toluene by plasmid-containing bacterial strains of the genus Pseudomonas]. PubMed: [Results and prospects for the hygienic regulation of monomers migrating out of materials designed for contact with food products (styrene, alpha-methylstyrene)]. PubMed: Mutagenicity of para-substituted alpha-methylstyrene oxide derivatives with Salmonella. PubMed: Identification and quantification of phencyclidine pyrolysis products formed during smoking. PubMed: Olefin oxygenation and N-dealkylation by dopamine beta-monooxygenase: catalysis and mechanism-based inhibition. PubMed: [Plasmid participation in the degradation of alpha-methylstyrene]. PubMed: Enzyme-activated irreversible inhibitors of monoamine oxidase: phenylallylamine structure-activity relationships. PubMed: [Oxidation of alpha-methylstyrene by Pseudomonas cultures]. PubMed: A comparison of cationic polymerization and esterification for end-point detection in the catalytic thermometric titration of organic bases. PubMed: Induction of sister-chromatid exchanges by styrene analogues in cultured human lymphocytes. PubMed: Monitoring of workers exposure to low levels of airborne monomers in a polystyrene production plant. PubMed: [alpha-Methylstyrene absorption through the skin in human beings]. PubMed: [Mechanism of the toxic effect of alpha-methylstyrene]. PubMed: [Gas chromatographic method for the separate determination of cumol, styrene and alpha-methylstyrene in soil]. PubMed: [Use of a kinetic spectrophotometric method for the quantitative determination of alpha-methylstyrene in biological media]. PubMed: [Some enzymological and immunological shifts following prolonged occupational exposure to the effects of alpha-methylstyrene and divinyl]. PubMed: [Determination of urinary atrolactic acid as a test of exposure to the action of alpha-methylstyrene]. PubMed: [Comparative evaluation of some methods for determining alpha-methylstyrene in air]. PubMed: [Liver function in workers engaged in the manufacture of divinyl-alpha-methylstyrene rubber]. PubMed: Biotransformation of ethyl benzene, styrene, and alpha-methylstyrene in man. PubMed: [Determining alpha-methylstyrene by the infrared spectroscopy method]. PubMed: [SPECTROPHOTOMETRIC DETERMINATION OF STYRENE AND ALPHA-METHYLSTYRENE IN THE EFFLUENTS FROM A DIVINYLSTYRENE (ALPHA-METHYLSTYRENE) RUBBER-PRODUCING PLANT AND IN OPEN WATER BASINS]. PubMed: [Spectrophotometric determination of benzene, isopropylbenzene and alpha-methylstyrene in the air]. PubMed: Steric inhibition of resonance in 1-methyl-2-isopropenylbenzene.