Acid Black 24 Acid Black BR black 3B

中文名称：酸性黑24



Chinese Synonyms: weak black BR; Weak Acid Black BR; Acid Black 3B; Acid Black B; Acid Black 24; CI Acid Black 24; Acid Black P-7BR; weak black 3B



English name: acid black 24 (C.I. 26370)



Molecular type: C36H23N5Na2O6S2



Molecular Weight: 731.71



Power points: 100,150





Physical Properties

Weak Acid Black Br (3071-73-6) Properties: blue black powder, Shade Similar to standard

Soluble in water, aqueous solution is red light blue to black, the addition of concentrated hydrochloric acid was green blue; join the concentrated sodium hydroxide solution was maroon. Soluble in ethanol was navy blue, can be dissolved in ethylene chun B mi slightly soluble in acetone, insoluble in other organic solvents. In concentrated sulfuric acid was blue and gray to black, dark-green blue diluted; in concentrated nitric acid was changed after the red light brown to yellow. Case of copper color when stained dark green, dark when the event iron.

Strength for the standard 100 points; water content