◇ Sodium thiosulfate
◇ Ammonium Thiosulphate
◇ 45% Potassium sulfite solution
70% Ammonium bisulphite...
◇ Sodium metabisulfite
◇ Vat red F3B
◇ Vat red 54#
◇ Vat red FBM
◇ Vat blue 66#
◇ 1-nitro-2-methyl-anthraquinone
◇ 2B acid
◇ M-chlorophenol
1-nitro-2-carboxylic anthraquinone

1, Structural formula:

2, Melting point : ≥290 ℃
3, Dry matter :≥93%
4, The assay of dry product :≥35%( the other is Moisture)
5, Color and luster : light yellow .