Leuco sulfur yellow 7 (C.I. 53037) Chemical Properties,Usage,Production
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.
