Sulfuric Acid → HCID 178527663, compound

Participants

Reaction Conditions

Reaction Steps

Under a nitrogen pad, about 55 g of 20 weight percent of fuming sulfuric acid is added slowly to about 10 g of iron-phthalocyanine. After the fuming sulfuric acid is completely added, the reaction mixture is heated to 50° C. for 2 hours. The reaction mixture is then cooled to room temperature and filtered. The filtrate is then washed with 500 mL of pH 8 water. The resulting solid is then removed and dried in a vacuum oven. The dried solid is then ground to a fine powder with a mortar and pestle. The final product is a dark gray powder having a tetra-sulfo iron-phthalocyanine yield of 70 percent. The material contains 12 percent sulfophthalimide, 25 percent phthalimide, 3 percent phthalic acid, and 0.8 percent sulfophthalic acid. A 1 percent solution of the material in 1:1 methyldiethanolamine:water yields excessive foaming characteristics and is non-filterable using standardized tests.

Provenance & Evidence