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Butyric anhydride

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Butyric anhydride Basic information
Butyric anhydride Chemical Properties
  • Melting point:−75-−66 °C(lit.)
  • Boiling point:198-199 °C(lit.)
  • Density 0.967 g/mL at 25 °C(lit.)
  • vapor density 5.45 (vs air)
  • vapor pressure 10 mm Hg ( 79.5 °C)
  • refractive index n20/D 1.413(lit.)
  • Flash point:190 °F
  • storage temp. Store below +30°C.
  • solubility alcohol: soluble (with decomposition)(lit.)
  • form Liquid
  • color Clear colorless to light yellow
  • explosive limit1.1%, 104°F
  • Water Solubility Decomposes
  • Sensitive Moisture Sensitive
  • Merck 14,1594
  • BRN 1099474
  • CAS DataBase Reference106-31-0(CAS DataBase Reference)
  • NIST Chemistry ReferenceButanoic acid, anhydride(106-31-0)
  • EPA Substance Registry SystemButyric anhydride (106-31-0)
Safety Information
  • Hazard Codes C
  • Risk Statements 14-34
  • Safety Statements 26-36/37/39-45
  • RIDADR UN 2739 8/PG 3
  • WGK Germany 1
  • RTECS ET7090000
  • 13
  • Autoignition Temperature535 °F
  • TSCA Yes
  • HazardClass 8
  • PackingGroup III
  • HS Code 29159000
  • Hazardous Substances Data106-31-0(Hazardous Substances Data)
  • ToxicityLD50 orally in Rabbit: 8790 mg/kg LD50 dermal Rabbit 6400 mg/kg
Butyric anhydride Usage And Synthesis
  • DescriptionButyric anhydride, or Butanoic anhydride, is a chemical compound with the formula (CH3CH2CH2CO)2O.It is a colorless liquid that smells strongly of butyric acid, formed by its reaction with the moisture in the air.
  • Chemical Propertiesclear liquid
  • UsesManufacture of butyrates, drugs, and tanning agents.
  • ApplicationBecause of its odor, butyric anhydride has use as a fumigant to drive bees from their hives in products such as Bee - Go.
  • PreparationTo a cooled flask containing 88 gm (1.0 mole) of η-butyric acid at 10°C is added dropwise 28.0 gm (0.5 mole) of methoxyacetylene over a 1-hr period. After stirring the reaction mixture for 16 hr at 20°C the contents are distilled to afford the following three fractions: (1) b.p. 56°C, η& 1.3628, 23 gm (62%), methyl acetate; (2) b.p. 72-73°C (18 mm Hg), n% 1.3990, 10.0 gm (11%), butyric acid; (3) b.p. 91-92°C (18mmHg), 1.4118, 48.0 gm (61%), butyric anhydride.
    Preparation of Butyric Anhydride
  • General DescriptionWater-white liquid with an odor of rancid butter. Flash point 190°F. Density 8.0 lb / gal. Corrosive to metals and tissue. Low toxicity.
  • Air & Water ReactionsSlowly reacts with water to form butyric acid.
  • Reactivity ProfileButyric anhydride reacts exothermically with water. The reaction is usually slow, but might become violent if local heating accelerates their rate. Acids accelerate the reaction with water. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.
  • Health HazardTOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Contact with molten substance may cause severe burns to skin and eyes. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
  • Fire HazardCombustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
  • Safety ProfileMildly toxic by ingestion. A corrosive liquid. When heated to decomposition it emits acrid smoke and irritating vapors.
  • SafetyButyric anhydride is a combustible, corrosive liquid. It is considered water sensitive.
  • Purification MethodsDry the anhydride by shaking it with P2O5, then distilling it. [Beilstein 2 IV 802.]
Butyric anhydride Preparation Products And Raw materials
Butyric anhydride(106-31-0)Related Product Information
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  • Company Name:Shanghai Aladdin Bio-Chem Technology Co.,LTD Gold
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