Mordant Brown 33

Preparation

2-Amino-4-nitrophenol diazotization, and?2,4-Diaminobenzenesulfonic acid coupling.

Flammability and Explosibility

Non flammable

Properties and Applications

yellow brown. Yellow brown powder. In the water solubility for 100 g/l (80 ℃), soluble in water and ethanol for yellow brown, and soluble in Cellosolve, slightly soluble in Acetone, insoluble in other organic solvent. Dye in concentrated sulfuric acid to red to red light brown, dilution have orange precipitation; In concentrated nitric acid for red solution, and then to yellow brown. Its aqueous solution for yellow light brown, add concentrated hydrochloric acid to brown light orange, Add sodium hydroxide solution to orange. Dyeing encounter copper ion color darker, iron ion is yellow. Mainly used for wool fabric dyeing, especially suitable for carpet, wool and wool top dyeing, also used for silk, nylon and leather dyeing. Also can be used for wool and a variety of fibre blended with bath dyeing. Can also be used for acetic acid chromium pretreatment of wool and silk fabric direct printing.