Methacrolein
Methacrolein is an organic compound with the formula C4H6O. It is the simplest unsaturated aldehyde, consisting of a vinyl group attached to the carbonyl carbon. Methacrolein is a colorless liquid with a pungent odor and is used as an intermediate in the production of various chemicals.
Structure and Properties[edit | edit source]
Methacrolein is an aldehyde, characterized by the presence of a carbonyl group (C=O) bonded to a hydrogen atom and a vinyl group. Its IUPAC name is 2-methylpropenal. The molecular structure can be represented as CH2=C(CH3)CHO. Methacrolein has a boiling point of 72 °C and a density of 0.846 g/cm3.
Synthesis[edit | edit source]
Methacrolein can be synthesized through the oxidation of isobutylene or by the dehydrogenation of isobutanol. Industrially, it is often produced as a byproduct in the manufacture of methacrylic acid and its esters.
Applications[edit | edit source]
Methacrolein is primarily used as an intermediate in the synthesis of methacrylic acid and methyl methacrylate, which are important monomers for the production of polymethyl methacrylate (PMMA) and other acrylic polymers. These materials are used in a wide range of applications, including paints, coatings, and adhesives.
Health and Safety[edit | edit source]
Methacrolein is a volatile and flammable liquid. It is an irritant to the eyes, skin, and respiratory system. Exposure to methacrolein can cause symptoms such as coughing, wheezing, and shortness of breath. Proper safety precautions, including the use of personal protective equipment and adequate ventilation, are necessary when handling this chemical.
Environmental Impact[edit | edit source]
Methacrolein is released into the environment through industrial emissions and as a byproduct of the combustion of organic materials. It can contribute to the formation of photochemical smog and has been identified as a volatile organic compound (VOC) that participates in atmospheric reactions.
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