Butyl acetate, also called as Acetic acid, n-butyl ester, is a colourless flammable liquid with medium volatility and a characteristic fruity ester odor. The substance is an organic compound with the formula C6H12O2. Butyl acetate has the CAS registry number of 123-86-4 and EINECS registry number of 204-658-1. It is stable but incompatible with strong oxidizing agents, strong acids and strong bases. The substance is toxic to lungs, the nervous system, mucous membranes.
Properties: Butyl acetate has excellent solvency characteristics for polymers, resins, oils and cellulose nitrate and is miscible with all common organic solvents, such as alcohols, ketones, aldehydes, glycols, ethers, glycol ethers and aromatic and aliphatic hydrocarbons. Butyl acetate is relatively difficult to dissolve in water compared with other lower homologue. Butyl acetate is an ester which reacts with acids to liberate heat along with alcohols and acids.
Butyl acetate heated with benzene in the presense of aluminum oxide to generate butylbenzene. Catalyzed by aluminum oxide at the temperature of 300-350 °C, it will generate chlorobutane, iso-butyl chloride and so on. It can also cause reaction of alcoholysis, ammonolysis, interesterification.
CAS Registry Number:123-86-4
Synonyms:acetic acid butyl ester；n-butyl acetate；butyl ethanoate
Molecular Structure:Butyl acetate C6H12O2 (cas 123-86-4) Molecular Structure
Appearance:colourless liquid with a fruity odor
Storage Temperature:Flammables area
Solubility:0.7 g/100 mL (20 °C) in water
Stability:Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, strong bases.
Chemical Properties: colourless liquid with a fruity odour
General Description: A clear colorless liquid with a fruity odor. Flash point 72 – 88°F. Density 7.4 lb / gal (less than water). Hence floats on water. Vapors heavier than air.
Air & Water Reactions: Highly flammable. Very slightly soluble in water.
Reactivity Profile: Butyl acetate is an ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. Attacks many plastics.
Skin: prolonged or frequently repeated exposures may lead to drying.
Inhalation: headaches, dizziness, nausea, irritation of respiratory passages and eyes.
Fire Hazard: 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.
Preparation: Butyl acetate is commonly manufactured by acetic acid with the presence of catalytic sulfuric acid under reflux conditions, which can be called as Fischer esterification of a butanol isomer. Add acetic acid, butanol and sulfuric acid into the bottom of esterification reactors to react at the tempreature around 120 °C.
CH3COOH + CH3(CH2)3OH [H2SO4] → CH3COO(CH2)3CH3
Uses: Butyl acetate can be used in coatings, coatings for plastic, nail care, leather industry and as cosmetic / personal care solvent, fragrance solvent, extraction solvent, pharmaceuticals and cleaners. In addition, it is used as a solvent in the production of lacquers and other products. Butyl acetate is also used as a synthetic fruit flavoring in foods such as candy, ice cream, cheeses, and baked goods. It is also applied to prepare perfume. In pharmaceutical industry, it is used as extractant. Butyl acetate is an azeotrope former with good ability to carry water. It is often used to condense some weak solution to reduce energy consumption.
When you are using Butyl acetate, you should be very cautious about it. It is flammable. And if repeated exposure, it may cause skin dryness or cracking. Moreover, its vapour may cause drowsiness and dizziness. You should avoid contact with eyes.