Molecular Formula:C34H25K2N11O11S3
Molecular Weight: 938.02
CAS Registry Number:99576-15-5

Properties and Applications: black. Suitable for wool, silk, polyamide fiber dyeing and printing, also suitable for leather color.

Molecular Formula:C20H12N3NaO7S
Molecular Weight: 461.38
CAS Registry Number:61931-02-0

Properties and Applications: ash to red and black. Dark brown powder, soluble in water. Used for wool, polyamide fiber, silk and their blended fabric dyeing and printing. Nylon fabric in good dye deep performance. Also can be used for leather color.

Molecular Formula:C16H11N2NaO4S
Molecular Weight: 350.33
CAS Registry Number:633-96-5

Properties and Applications: red light orange. Golden yellow powder. Soluble in water is red light yellow, orange soluble in alcohol. The strong sulfuric acid for quality in red, dilute create tan precipitation; In a golden of nitric acid; In the thick of sodium hydroxide solution not dissolve. Its water solution with hydrochloric acid generation tan precipitation; Add sodium hydroxide solution brown. In dyeing copper ions trend dark red in colour and lustre of iron ion shallow and dark. Discharge the gender is good. Mainly used for silk and wool dyeing, widely used in wool dyeing, can be used for wool, silk and polyamide fiber fabric of direct printing, leather and paper color, can also be used in indicator and biological shading. Is tasted can be used as a food dye, heavy metal salt used in organic pigments.