Methyl acetoacetate
CAS 105-45-3
EC 203-299-8
Formula C5H8O3
MW 116.12 g/mol
Flavors & Fragrances Personal Care & CosmeticsFood & NutritionPlastics & PolymersPrinting & Packaging Cross-linking & CuringFlavoring & AcidulantSolvent & Carrier
Description
Methyl acetoacetate (CAS 105-45-3, EC 203-299-8) is a beta-ketoester also known as methyl 3-oxobutyrate and acetoacetate methyl ester. It carries no E-code designation and is not classified as a food additive under EU frameworks, though it functions as a flavorant in permitted applications under flavoring regulations.
In food and fragrance formulations, it contributes fruity, rum-like notes and acts as a reactive intermediate in flavor synthesis. In polymer and coating systems, its active methylene group enables crosslinking reactions with isocyanates or amines, improving adhesion and film integrity in printing inks and adhesive formulations.
Methyl acetoacetate is supplied in technical and flavor-grade forms, with FCC-grade material available for food-contact applications. It falls under REACH regulation (HS code 29183000) and is handled in standard bulk liquid packaging. Suppliers should confirm grade specification and purity certificates prior to procurement.
In food and fragrance formulations, it contributes fruity, rum-like notes and acts as a reactive intermediate in flavor synthesis. In polymer and coating systems, its active methylene group enables crosslinking reactions with isocyanates or amines, improving adhesion and film integrity in printing inks and adhesive formulations.
Methyl acetoacetate is supplied in technical and flavor-grade forms, with FCC-grade material available for food-contact applications. It falls under REACH regulation (HS code 29183000) and is handled in standard bulk liquid packaging. Suppliers should confirm grade specification and purity certificates prior to procurement.
Physical Properties
| 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) |
Safety & Handling (Learn More)
Warning GHS07
H
H227H319H336
P
P210P261P271P280P319P403P405P501P264+P265P304+P340P337+P317P370+P378P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29183000 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Other Names
Methyl 3-Oxobutanoateacetoacetic acid methyl esterMAAACMMethyl acetylacetateMETHYL 3-OXOBUTYRATE
Related Products
Raw Materials
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