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Methyl acetoacetate

CAS Number
105-45-3
EC Number
203-299-8
Chemical Formula
C5H8O3
Molecular Weight
116.11 g/mol

Description

Methyl acetoacetate ( CAS 105-45-3 ), commonly abbreviated as MAA, is a beta-ketoester used across coatings, polymer chemistry, and flavor manufacturing. Acetoacetic acid methyl ester is a recognized alternative name buyers encounter in technical sourcing contexts. It functions as a reactive intermediate and solvent carrier in industrial formulation. In coatings and printing inks, MAA acts as a crosslinking agent in acetoacetate-functional systems, enabling ambient-cure reactions without isocyanates. Polymer manufacturers use it as a monomer building block to introduce reactive ester functionality into acrylic and vinyl resins. In flavor formulation, it contributes fruity, rum-like top notes to food products and is used in compounding flavor concentrates. This chemical is essential for confectionery and beverages. Personal care formulators incorporate it as a fragrance intermediate in the synthesis of aroma chemicals used in finished cosmetic products and various consumer goods. Methyl acetoacetate is supplied as a clear liquid in drum and IBC quantities, with bulk tanker options available for high-volume industrial buyers. It is offered in technical grade for coatings and polymer applications. The product is also available in purity grades meeting food and flavor industry specifications. Suppliers typically provide documentation aligned with FCC and FEMA -recognized flavor ingredient requirements for global distribution. Contact us for supply of Methyl acetoacetate Request Quote

Other Names (Synonyms)

methyl 3-oxobutanoate | acetoacetic acid methyl ester | Methyl acetylacetate | Methyl 3-oxobutyrate | 3-Oxobutanoic acid methyl ester | Methyl acetylacetonate | Butanoic acid, 3-oxo-, methyl ester | MAA

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-27 °C
Boiling Point171.7 °C
Density1.0762 g/cm³ @ Temp: 20 °C
Flash Point158 °F
AppearanceColorless, clear liquid
ColorAPHA: ≤20
Odorat 100.00 %. fresh fruity citrus green
FormLiquid
Water Solubility460 g/L (20 ºC)
Vapor Pressure1 hPa (20 °C)
Refractive Indexn 20/D 1.419(lit.)
pH3.8 (863g/l, H2O, 20℃)
Log P0.185 (est)

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H227Combustible liquid
H319Causes serious eye irritation
H336May cause drowsiness or dizziness

Precautionary Statements

P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P319Get medical advice/attention if you feel unwell.
P403Store in a well-ventilated place.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29183000
Storage Class10 - Combustible liquids
WGK (Germany)1