Coumarin/1,2-Benzopyrone/5,6-Benzo-2-pyrone/cis-o-Coumarinic acid lactone/Coumarinic anhydride

English Name:Coumarin；1,2-Benzopyrone；5,6-Benzo-2-pyrone；cis-o-Coumarinic acid lactone；Coumarinic anhydride；Tonka bean camphor

Other names: coumarin lactone; 1,2-benzopiperone; Oxanaphthalene o-ketone; O-oxynaphthalene ketone; Benzo-o-oxone; 1,2-benzopyranone; 2h-1-benzopyran-2-one

CAS No.: 91-64-5

C9H6O2=146.14

Grade: high purity grade

Content: ≥ 98.0%

Melting point: 68 ~ 70 ℃

Ethanol dissolution test: qualified

Burning residue: ≤ 0.1%

 Physicochemical Properties: colorless rhombic or rectangular crystal or powder. It has vanilla and bean fragrance, with burning taste and bitter taste. Soluble in ethanol, ether, chloroform, volatile oil and alkali hydroxide solution, slightly soluble in boiling water. The relative density (d204) is 0.935. The melting point is 68 ~ 70 ℃. The boiling point is 297 ~ 299 ℃. Flash point 162 ℃. Moderate toxicity, median lethal dose (rat, oral) 293mg/kg

Purpose: biochemical research. Fluorescent indicator. Coumarin was discovered in black fragrant beans in 1820. Coumarin exists in many plants in the form of glycosides. It has the strong fragrance of black beans, as well as the sweet smell of fresh mowed grass and chocolate, which will last for a long time. The aroma of fresh hay is largely caused by the production and release of coumarin during the fermentation and decomposition of glycosides in the process of drying new mowing. Coumarin is used in the manufacture of spices, and is often used in the preparation of new mowing and Fuqi spices. And violet, sunflower, suxinlan, hawthorn, orchid, lavender and other essence. Together with vanillin, it can be used for flavoring candies, cakes and the like. Adding it to tobacco can increase the natural flavor. Adding coumarin to the plating solution of zinc plating (or cadmium, nickel) can reduce the plating porosity and increase the brightness. Coumarin is the raw material for manufacturing other spices and many other chemicals. Xiangdou is the parent of a large class of derivatives

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