Diisobutyl Ketone, also known as 2,6-Dimethyl-4-heptanone, 2,6-Dimethyl-heptan-4-one, or Diisopropylacetone (abbreviated as DIBK), is a colorless, oily liquid with a peppermint odor at room temperature. It naturally occurs in cognac and wines. DIBK is relatively stable, slightly soluble in water, and miscible with most organic solvents. Its vapors have mild irritant effects on the eyes and nose and can cause anesthesia and respiratory depression at high concentrations. Repeated exposure may cause nausea and dizziness and have mild effects on the liver and kidneys. DIBK is a high flash point flammable liquid, can ignite when exposed to open flames or high heat, and can react with strong oxidizers, causing combustion. Its vapors can form explosive mixtures with air. It is mainly used as a solvent for nitrocellulose, rubber, resins, coatings, and as a raw material for organic synthesis. The molecular formula is C9H18O, and its chemical structure is (CH3)2CHCH2COCH2CH(CH3)2.

Chinese Name: 二異丁基甲酮
English Name: Diisobutyl Ketone
Molecular Formula: C9H18O
Molecular Weight: 142.23

1. Physical Properties:

*Appearance: Colorless, transparent oily liquid
*Boiling Point: 168°C
*Melting Point: -41.5°C
*Flash Point (Closed Cup): 48°C
*Density: 0.8053
*Vapor Pressure: 0.23 kPa at 20°C
*Solubility: Slightly soluble in water, miscible with most organic solvents
*Stability: Stable

2. Chemical Properties:

*CAS No.: 108-83-8
*EINECS No.: 203-620-1
*Molecular Weight: 142.23
*Molecular Formula and Structure: C9H18O, (CH3)2CHCH2COCH2CH(CH3)2
*Common Chemical Reactions: Mainly exhibits reactivity of the active carbonyl group, such as hydrogenation, oxidation, and condensation.
*Incompatible Substances: Strong oxidizers, strong reducing agents, strong bases
*Polymerization Hazard: No polymerization hazard

3. Usage:

DIBK is primarily used as an organic solvent and in organic synthesis. It can dissolve cellulose acetate, nitrocellulose, polystyrene, vinyl resins, waxes, varnishes, natural resins, and raw rubber. Due to its high boiling point and slow evaporation rate, it is used as a solvent for nitrocellulose lacquers, vinyl resin coatings, and other synthetic resin coatings. It also serves as an intermediate in organic synthesis, including for certain pharmaceuticals and pesticides. Additionally, it is used in food flavorings, primarily for jackfruit, banana, orange juice, passion fruit, tropical fruit, rum, and cognac. The usage limits (mg/kg) are as follows: baked goods 5.0; ice cream 2.0; candy 5.0; puddings 1.1; non-alcoholic beverages 0.8; alcoholic beverages 1.1.