Methyl Aceto Acetate

Cas Number


Other Names


Methyl 3-oxobutanoate,


Acetoacetic acid methyl ester,


Methyl 3-oxobutyrate

The formula



Methyl acetoacetate is a chemical reagent used in the synthesis of pharmaceuticals. It participates in the Biginelli reaction, forming molecules including dihydropyrimidinones.

Physical and Chemical Properties
Physical state and Appearance : Clear Colorless Liquid
Molecular Weight : 116.12
Color : Colorless
Boiling Point : 169 - 170 deg °C @ 760.00mm Hg
Flash point : 70 ° C
Specific Gravity : 1.0760 g/cm3
Vapor Pressure : 1.7 mmHg @ 20 °C
Vapor Density: 4
Solubility: Miscible
Purity %: 99 min
Water %: 0.20 max
Acidity %: 0.10 max

Electroplating and electrochemical processes

1. The principal application, consuming approximately 80% of the MMA, is the manufacture of polymethyl methacrylate acrylic plastics (PMMA)

2. Methyl methacrylate is also used for the production of the co-polymer methyl methacrylate-butadiene-styrene (MBS), used as a modifier for PVC.

3. Nearly all methyl methacrylate (MMA) is polymerised to make homopolymers and copolymers with the largest application being the casting, moulding or extrusion of polymethyl methacrylate (PMMA) or modified polymers

4. Methylmethacrylate-butadiene-styrene (MBS) copolymers are used as an impact modifier for clear rigid polyvinyl chloride (PVC) and in food and pharmaceutical packaging

5. A major application of MMA polymers and copolymers is in surface coatings and impregnation resins to give colour fastness and weather-resistance properties to latex paints, lacquer resins and stoving enamels