Leuco sulfur yellow 7 (C.I. 53037)

Preparation

The 129 parts of O-Methylaniline, 55 parts of 4-Nitrobenzenamine and a mixture of 220 parts of sulfur calcined, and in 6 ~ hours gradually heating up To 250 ℃, its product with Sodium hydroxide or Sodium sulfide solution treatment.

Properties and Applications

yellow.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fulling	Persperation Fastness	Soaping
						Moderate	Severe
ISO	2-3	4	3-4			4	3-4