- Product Name:
- Diacetone Alcohol
- Diacetone Alcohol 〔4-Hydroxy-4-methyl-2-pentanone〕
- 2-Pentanone, 4-hydroxy-4-methyl-
- Product Categories:
- Organic solvents
- Industrial/Fine Chemicals
- Building Blocks
- C3 to C6
- Carbonyl Compounds
- Chemical Synthesis
- Organic Building Blocks
- Mol File:
Diacetone Alcohol Chemical Properties
- Melting point:
- -42.8 °C
- Boiling point:
- 166 °C(lit.)
- 0.938 g/mL at 20 °C
- vapor density
- 4 (vs air)
- vapor pressure
- <1 mm Hg ( 20 °C)
- refractive index
- n20/D 1.423(lit.)
- Flash point:
- 132 °F
- storage temp.
- Store below +30°C.
- Soluble in alcohol, ether (Weast, 1986), and many other solvents, particular ketones such as acetone and 2-butanone.
- Clear colorless
- Mild, pleasant.
- explosive limit
- Water Solubility
- Exposure limits
- TLV-TWA 240 mg/m3 (50 ppm) (ACGIH); IDLH 2100 ppm (NIOSH).
- Stable. Flammable. Incompatible with strong oxidizing agents, amines, ammonia, strong acids, strong bases, alkalies, aluminium.
- CAS DataBase Reference
- 123-42-2(CAS DataBase Reference)
- NIST Chemistry Reference
- EPA Substance Registry System
- 2-Pentanone, 4-hydroxy-4-methyl-(123-42-2)
- Hazard Codes
- Risk Statements
- Safety Statements
- UN 1148 3/PG 3
- WGK Germany
- Autoignition Temperature
- 640 °C
- 2914 40 10
- Hazardous Substances Data
- 123-42-2(Hazardous Substances Data)
- LD50 orally in rats: 4.0 g/kg (Smyth)
Diacetone Alcohol Usage And Synthesis
Diacetone alcohol is available in two grades: a commercial grade containing 15% acetone and an acetone-free grade. Both solvent grades of diacetone alcohol may acquire a yellow color on aging; both are good solvents for nitrocellulose, cellulose esters, and several other types of resins. The much slower evaporating diacetone alcohol is similar to acetone in its solvency. It is used in brushing-type cellulose ester lacquers to produce hard and brilliant gloss films. Diacetone alcohol is also used as lacquer thinner and in coating compositions for paper and textiles. Mesityl oxide, the unsaturated medium boiling point ketone that is prepared by the dehydration of diacetone alcohol, will darken and form a solid residue on aging.
Diacetone alcohol is a colorless liquid. Mild, mint odor.
Clear, watery, flammable liquid with a mild, pleasant, characteristic odor similar to 2-butanone or the pentanones. Experimentally determined detection and recognition odor threshold concentrations were 1.3 mg/m3 (270 ppbv) and 5.2 mg/m3 (1.1 ppmv), respectively (Hellman and Small, 1974).
Solvent for cellulose acetate, nitrocellulose, celluloid, fats, oils, waxes, resins. As a preservative in pharmaceutical preparations. In some antifreeze solutions and in hydraulic fluids.
4-Hydroxy-4-methyl-2-pentanone is used asa solvent for nitrocellulose, cellulose acetate,resins, fats, oils, and waxes; and in hydraulicfluids and antifreeze solutions..
ChEBI: A beta-hydroxy ketone formed by hydroxylation of 4-methylpentan-2-one at the 4-position. It has been isolated from Achnatherum robustum.
A clear colorless liquid with a pleasant odor. Flash point below 141°F. Less dense than water. Vapors heavier than air.
Air & Water Reactions
Highly flammable. Soluble in water.
Acetyl bromide reacts violently with alcohols or water, [Merck 11th ed., 1989]. Mixtures of alcohols with concentrated sulfuric acid and strong hydrogen peroxide can cause explosions. Example: An explosion will occur if dimethylbenzylcarbinol is added to 90% hydrogen peroxide then acidified with concentrated sulfuric acid. Mixtures of ethyl alcohol with concentrated hydrogen peroxide form powerful explosives. Mixtures of hydrogen peroxide and 1-phenyl-2-methyl propyl alcohol tend to explode if acidified with 70% sulfuric acid, [Chem. Eng. News 45(43):73(1967); J, Org. Chem. 28:1893(1963)]. Alkyl hypochlorites are violently explosive. They are readily obtained by reacting hypochlorous acid and alcohols either in aqueous solution or mixed aqueous-carbon tetrachloride solutions. Chlorine plus alcohols would similarly yield alkyl hypochlorites. They decompose in the cold and explode on exposure to sunlight or heat. Tertiary hypochlorites are less unstable than secondary or primary hypochlorites, [NFPA 491 M, 1991]. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].
Vapor is irritating to the mucous membrane of the eye and respiratory tract. Inhalation can cause dizziness, nausea, some anesthesia. Very high concentrations have a narcotic effect. The liquid is not highly irritating to the skin but can cause dermatitis.
4-Hydroxy-4-methyl-2-pentanone is a mildirritant and a strong narcotic. It can causeirritation in the eyes, nose, throat, and skin.The effect on humans, however, is mild at100 ppm concentration.
Animal experiments indicated that it couldproduce sleep after a period of restlessnessand excitement. The symptoms of its toxicity are a marked decrease in breathing andblood pressure, and relaxation of the muscles. Ingestion of this compound in highdoses can damage corneal tissue and liver.The oral toxicity in rats was very low, witha LD50 value of 4000 mg/kg..
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Reactivity with Water : No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Moderately toxic by ingestion and intraperitoneal routes. Mddly toxic by skin contact. Human systemic effects by inhalation: headache, nausea or vomiting, eye and pulmonary changes. A skin, mucous membrane, and severe eye irritant. Can cause anemia and damage to liver and hdneys. Narcotic in high concentration. Flammable liquid when exposed to heat or flame; can react with oxidzing materials. Explosive in the form of vapor when exposed to heat or flame. To fight fire, use alcohol foam, foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also KETONES.
It is used as a solvent for pigments, cellulose esters; oils and fats. It is used in hydraulic brake fluids and in antifreeze formulations.
Biological. Using the BOD technique to measure biodegradation, the mean 5-d BOD value (mM
BOD/mM diacetone alcohol) and ThOD were 3.67 and 45.9%, respectively (Vaishnav et al.,
Photolytic. Grosjean (1997) reported a rate constant of 4.0 x 10-12 cm3/molecule?sec at 298 K for the reaction of OH radicals in the atmosphere. Based on a OH concentration of 1.0 x 106 molecule/cm3, the reported half-life of diacetone alcohol is 2.0 d (Grosjean, 1997).
UN1148 Diacetone alcohol, Hazard Class: 3; Labels: 3-Flammable liquid.
The pentanone loses water when heated. It can be dried with CaSO4, then fractionally distilled under reduced pressure. [Beilstein 1 IV 403.]
Vapor may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, perox- ides, permanganates, perchlorates, chlorine, bromine, fluo- rine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, and epoxides.
Dissolve or mix the material with a combustible solvent and burn in a chemical incinera- tor equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.
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