Leuco Sulphur Brown 21

Preparation

80 parts of??4-Methylbenzene-1,3-diamine?, 48 parts of?4-Nitrobenzenamine?and 283 parts of sulfur was stirred at?200 ~ 210 ℃ calcination 10 hours, then use Sodium sulfide solution treatment its product (BISO 1155, 39).

Properties and Applications

yellow brown.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fulling	Persperation Fastness	Soaping
						Moderate	Severe
ISO	1-2	4	4	4	4-5	4	4