Flavors & Fragrances
REACH
Methyl acetoacetate
CAS Number
105-45-3
EC Number
203-299-8
Abbreviation
MAA
What is Methyl acetoacetate?
Methyl acetoacetate (CAS 105-45-3), commonly abbreviated as MAA, is a beta-ketoester. Also known as acetoacetic acid methyl ester.
Where is Methyl acetoacetate used?
- Coatings and printing inks: crosslinking agent in acetoacetate-functional systems, enabling ambient-cure reactions without isocyanates
- Polymer manufacturing: monomer building block introducing reactive ester functionality into acrylic and vinyl resins
- Flavor formulation: fruity, rum-like top notes in flavor concentrates
- Personal care: fragrance intermediate in the synthesis of aroma chemicals
- It functions as a reactive intermediate and solvent carrier in industrial formulation.
Good to know: Purity grades meeting food and flavor industry specifications are available; suppliers typically provide documentation aligned with FCC and FEMA-recognized flavor ingredient requirements.
Commercial specifications
- Drum and IBC quantities
- Bulk tanker options
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
What are the physical properties of Methyl acetoacetate?
Melting Point -27 °C
Boiling Point 171.7 °C
Density 1.0762 g/cm³ @ Temp: 20 °C
Flash Point 158 °F
Appearance Colorless, clear liquid
Color APHA: ≤20
Odor at 100.00 %. fresh fruity citrus green
Form Liquid
Water Solubility 460 g/L (20 ºC)
Vapor Pressure 1 hPa (20 °C)
Refractive Index n 20/D 1.419(lit.)
pH 3.8 (863g/l, H2O, 20℃)
Log P 0.185 (est)
How is Methyl acetoacetate classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H227 Combustible liquid
H319 Causes serious eye irritation
H336 May cause drowsiness or dizziness
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Methyl acetoacetate?
HS Code 29183000
Storage Class 10 - Combustible liquids
WGK (Germany) 1