ACID BLUE 41

Chemical properties

purple to dark violet powder

Preparation

1-Amino-4-bromo-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid and?N-(4-aminophenyl)-N-methylacetamide in copper salt and tied the presence of acid agents condensation, and then into sodium salt.

Properties and Applications

blue. Dark blue powder, soluble in water, water solution without gathered at room temperature phenomenon. The strong sulfuric acid dyes for dark brown, after dilute for pink; In the nitric acid for brown (already break). The water solution is blue, add hydrochloric acid sodium hydroxide or after the same color. Discharge sex is bad, dyeing copper ions in the dark colored, iron ion in light and dark red. Used for wool, polyamide fiber, silk and wool blended fabric dyeing and printing directly, can also be used for leather and paper shading.