General Description
White to pale yellow clear oily liquid with a sweet odor. Solidifies around room temperature.
Reactivity Profile
3,4-DIHYDROCOUMARIN(119-84-6) is a lactone (behaves as 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. This chemical may hydrolyze under alkaline or acidic conditions.
Air & Water Reactions
Solutions of the chemical in water are stable for less than two hours. Insoluble in water.
Fire Hazard
This chemical is combustible.
Chemical Properties
clear light yellow to brown liquid after melting
Chemical Properties
Dihydrocoumarin forms colorless crystals (mp
24°C) with a sweet, herbal odor. Dihydrocoumarin is prepared by hydrogenation
of coumarin, for example, in the presence of a Raney nickel catalyst. Another
process employs the vapor-phase dehydrogenation of hexahydrocoumarin in the
presence of Pd or Pt-Al2O3 catalysts . Hexahydrocoumarin is prepared by
cyanoethylation of cyclohexanone and hydrolysis of the nitrile group, followed
by ring closure to the lactone.
Chemical Properties
Dihydrocoumarin has an odor similar to coumarin at room temperature or reminiscent of nitrobenzene at higher temperature. It has a burning taste
Occurrence
Reported found in Melilotus officinalis, from which it may be extracted by water distillation.
Definition
ChEBI: A chromanone that is the 3,4-dihydro derivative of coumarin.
Preparation
By reduction of coumarin under pressure in the presence of nickel at 160 to 200°C or in the presence of Pd-BaSO4 in
alcoholic solution.
Biochem/physiol Actions
Taste at 10 ppm
