benzaldehyde

/ben-zal-duh-hahyd/US // bɛnˈzæl dəˌhaɪd //UK // (bɛnˈzældɪˌhaɪd) //

苯甲醛,苯丙醛,苯甲醛,苄醛

Definitions

n.名词 noun

1
Chemistry.
- : a colorless or yellowish, water-soluble, volatile oil, C7H6O, having a bitter, almondlike odor, used chiefly in the organic synthesis of dyes, perfumes, and flavors, and as a solvent; artificial oil of bitter almond.

Emulsine has the property of being able to hydrolyse the glucoside amygdalin to glucose, benzaldehyde, and hydrocyanic acid.
It crystallizes from water in large rhombic crystals, which melt at 118 C. Oxidizing agents convert it into benzaldehyde.
When completely hydrolyzed, it yields two molecules of glucose and one each of benzaldehyde and hydrocyanic acid.
The natural oil may frequently be differentiated from artificial benzaldehyde by the presence of chlorine in the latter.
Chlorine and nitric acid oxidize it to benzil; chromic acid mixture and potassium permanganate, to benzoic acid and benzaldehyde.