(a) in potassium nitrate, LvSuanJia, glucose or organic acid salt (such as formic acid potassium or acetic acid potassium or the mixture of both) under the existence of, with potassium hydroxide treatment 2-Aminoanthracene-9,10-dione;
정의
A blue vat dye or pigment. The molecule consists of
two anthraquinone nuclei linked through two –NH
groups.
화학 반응
As a pigment, indanthrone is a particulate, insoluble solid dispersed directly into a vehicle, whereas as a dye it is reduced to a base-soluble hydroquinone derivative and then reoxidized onto a solid substrate.
일반 설명
Blue needles with a metallic luster or fine fluffy deep blue powder.
공기와 물의 반응
Insoluble in water.
화재위험
Flash point data for Vat Blue 4 are not available. Vat Blue 4 is probably combustible.
Purification Methods
Crystallise indanthrene repeatedly from 1,2,4-trichlorobenzene to give a blue powder. It is soluble in alkali and conc H2SO4. [Weinstein & Merritt J Am Chem Soc 81 3759 1959, Beilstein 24 II 317, 24 III/IV 2193.]
