【Specification of  Chrysophenine GX】

Chrysophenine GX alias chysophenine G, direct yellow 12. The appearance is dark yellow uniform powder. It is yellow to golden in water, and its solubility is 30g/L. 2% dye aqueous solution will form jelly when it is lower than 15 ℃. Slightly soluble in alcohol, green and yellow, slightly soluble in fibrinolysin and acetone. It is red-light purple in concentrated sulfuric acid, and there is purple to red-light blue precipitate after dilution. The aqueous solution with concentrated sulfuric acid is precipitated in dark purple sauce, and the concentrated sodium hydroxide is precipitated in golden orange, and slightly discolors in the presence of 10% sodium hydroxide solution.