red orange and brown. From benzene in crystallization out products for red brown crystallization, melting point 148 ℃. Soluble in ethanol, acetone and benzene. In concentrated sulfuric acid to yellow, dilution after bright yellow; In concentrated sodium hydroxide solution insoluble. Dye alcohol solution to join dilute hydrochloric acid for brown light red; Join dilute sodium hydroxide solution for brown light yellow. Used for oil, paraffin wax, printing ink, alcohol soluble paint color.
|
Standard
|
Light Fastness
|
Heat-resistant(℃)
|
water
|
Sodium Carbonate(5%)
|
Hydrochloric acid(5%)
|
|
Melting point
|
Stable
|
|
ISO
|
Poor
|
|
|
Insoluble
|
Good
|
Good
|
