Organic Acids
REACH
Acetylacetone
CAS Number
123-54-6
EC Number
204-634-0
Abbreviation
acac
What is Acetylacetone?
Acetylacetone (CAS 123-54-6), also known as Hacac or acac, is a beta-diketone solvent and chelating agent.
Where is Acetylacetone used?
- Catalyst manufacturing: coordinates with metals such as vanadium, cobalt, and zirconium to produce metal acetylacetonate precursors for polymerization and cross-linking systems
- Printing ink and coatings: cross-linking agent and solvent carrier, improving adhesion and cure performance
- Pharmaceuticals: building block in active ingredient synthesis
- Food: flavoring agent at lower concentrations, providing a creamy, buttery note to confectionery and beverage formulations
- It forms stable metal complexes for synthesis and formulation workflows requiring precise metal coordination.
Good to know: Technical and reagent grades are standard; a food-grade designation is available where purity documentation is required by audits.
Commercial specifications
- Drum and IBC quantities; bulk tanker options
Other Names (Synonyms)
pentane-2,4-dione|pentan-2,4-dione|Hacac|CH3-CO-CH2-CO-CH3|acetyl 2-propanone|2,4-pentanedione|2,4-pentadione|2,4-dioxopentane|acac
What are the physical properties of Acetylacetone?
Melting Point -23 °C
Boiling Point 140 °C
Density 0.9721 g/cm³ @ Temp: 25 °C
Flash Point 66 °F
Appearance 2,4-Pentanedione is a colorless to yellowish liquid with a sour, rancid odor. The Odor Threshold is 0.01 ppm.
Color very deep green-yellow
Odor pleasant odor
Form Liquid
Water Solubility 16 g/100 mL (20 ºC)
Vapor Pressure 6 mm Hg ( 20 °C)
Refractive Index n 20/D 1.452(lit.)
pH 6 (200g/l, H2O, 20℃)
Log P 0.68 at 20℃
How is Acetylacetone classified and handled safely? Learn More
Warning
GHS02· Flammable GHS07· Irritant GHS06· Toxic GHS08· Health Hazard
Hazard Statements
H226 Flammable liquid and vapor
H302 Harmful if swallowed
H311 Toxic in contact with skin
H312 Harmful in contact with skin
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
Which trade and regulatory codes apply to Acetylacetone?
HS Code 29141900
UN Number 2310
ADR Class 3
Packing Group III
WGK (Germany) 1