Curcumin/1,7-Bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione/C.I. 75300/C.I. Natural Yellow

English Name: Curcumin; 1,7-Bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione； C.I. 75300； C.I. Natural Yellow 3； Diferuloylmethane

Other names: kecuming; 1,7-bis (4-hydroxy-3-methoxyphenyl) - 1,6-heptadiene-3,5-dione; Natural yellow 3; Methane ferulate; (E, e) - 1,7-bis (4-hydroxy-3-methoxyphenyl) - 1,6-heptadiene-3,5-dione Curcumin; Curcumin; Chuanxiong lactone B

CAS No.: 458-37-7

C21H20O6=368.38

Grade: ar

Content: ≥ 98.0%

Melting point: 182 ～ 185 ℃ (2 ℃ spacing)

Sensitivity test: acceptable

Ethanol dissolution test: acceptable

Burning residue (calculated by sulfate): ≤ 0.4%

Physicochemical Properties: orange yellow crystalline powder. Soluble in glacial acetic acid and ethanol, reddish brown in alkali, pale yellow in acid, insoluble in water and ether. The melting point is 183 ℃. Irritating

Purpose: biochemical research. Manufacturing turmeric test paper, pH 8 ~ 9. Determination of boron

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