TIANFU-CHEM - Methacrolein CAS NO.78-85-3

methacrolein basic information

product name: methacrolein

synonyms: 2-methyl-2-propenal;2-methyl-propenal;methacrylaldehyde;methacrolein;2-formyl-1-propene;2-methyl-2-propen-1-al;2-methyl-2-propena;2-methyl-acrolei

cas: 78-85-3

mf: c4h6o

mw: 70.09

einecs: 201-150-1

product categories: aliphatics;intermediates & fine chemicals;mutagenesis research chemicals;pharmaceuticals

mol file: 78-85-3.mol

methacrolein structure

methacrolein chemical properties

melting point -81 °c

boiling point 69 °c

density 0.85 g/ml at 25 °c(lit.)

vapor density 2.4 (vs air)

vapor pressure 121 mm hg ( 20 °c)

refractive index n20/d 1.416(lit.)

fp 5 °f

storage temp. 2-8°c

form liquid

color pale yellow

water solubility 6 g/100 ml (20 ºc)

sensitive light sensitive

stability: stable. incompatible with strong bases, strong oxidising agents, strong reducing agents. light and air-sensitive. hazardous polymerisation may occur.

cas database reference 78-85-3(cas database reference)

nist chemistry reference 2-propenal, 2-methyl-(78-85-3)

epa substance registry system 2-propenal, 2-methyl-(78-85-3)

safety information

hazard codes f,t

risk statements 11-24/25-34-26

safety statements 16-26-36/37/39-45-28a

ridadr un 2396 3/pg 2

wgk germany 3

rtecs oz2625000

f 8-23

tsca yes

hazardclass 3

packinggroup ii

hazardous substances data 78-85-3(hazardous substances data)

msds information

provider language

methacrolein english

sigmaaldrich english

acros english

alfa english

methacrolein usage and synthesis

chemical properties colourless to light yellow liquid

uses an unsaturated aldehyde used in the manufacture of polymers and synthetic resin. cancer studies revealed consumption and release of this volatile organic compound in human small cell lung cancer line, a potential cancer biomarker.

uses methacrolein was used to study the effect of parts per billion levels of limonene oxidation products and the terpene oxidation product, methacrolein on human eye blink frequency. it was also used in determination of rate constants and the products of the reactions between atomic chlorine and acrolein, methacrolein and methyl vinyl ketone.

general description a colorless liquid. flash point 35°f. less dense than water. may be toxic by ingestion, inhalation and skin absorption. severely irritating to skin and eyes. used to make plastics.

air & water reactions highly flammable. soluble in water.

reactivity profile methacrolein is an aldehyde. aldehydes are frequently involved in self-condensation or polymerization reactions. these reactions are exothermic; they are often catalyzed by acid. aldehydes are readily oxidized to give carboxylic acids. flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. these autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). the addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation.

health hazard toxic; may be fatal if inhaled, ingested or absorbed through skin. inhalation or contact with some of these materials will irritate or burn skin and eyes. fire will produce irritating, corrosive and/or toxic gases. vapors may cause dizziness or suffocation. runoff from fire control or dilution water may cause pollution.

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 and poison hazard indoors, outdoors or in sewers. may polymerize explosively when heated or involved in a fire. runoff to sewer may create fire or explosion hazard. containers may explode when heated. many liquids are lighter than water.

methacrolein preparation products and raw materials

preparation products fenpropimorph-->3,8-dimethyl-1,10-phenanthroline-->3,8-dimethylquinoline