Solubilised Vat Orange 1
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Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
Generally, vat orange 1 and sulfur trioxide react through reactor, then sodium hydroxide neutralizes, finally obtain product.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Inorganic salts (as NaCl), %, ≤
 
pH (25°C, 1% solution)
5.5 - 8.0
Test Methods
(1), Inorganic salts
GB/T 23977 Dyestuffs - Determination of content of salt - Conductance method
(2), pH
GB/T 2390 Dyes - Determination of pH value
2. Hazardous substances indexes
Item
Hazardous substances indexes
Pb, mg/Kg, ≤
100
As, mg/Kg, ≤
50
Test Methods
(1), Pb
GB 20814 Limit and determination of the quantity of heavy-metal elements in dye products