Sum of volatile matter (at 135 °C.) and chlorides and sulfates (calculated as sodium salts), not more than 14.0 percent.
Water-insoluble matter, not more than 0.2 percent.
Higher sulfonated subsidiary colors (as sodium salts), not more than 1.0 percent.
Lower sulfonated subsidiary colors (as sodium salts), not more than 1.0 percent.
Disodium salt of 6-hydroxy-5-[(2-methoxy-5-methyl-4-sulfophenyl) azo] -8-(2-methoxy-5-methyl-4-sulfophenoxy)-2-naphthalenesulfonic acid, not more than 1.0 percent.
Sodium salt of 6-hydroxy-2-naphthalenesulfonic acid (Schaeffer's salt), not more than 0.3 percent.
4-Amino-5-methoxy-o- toluenesulfonic acid, not more than 0.2 percent.
Disodium salt of 6,6'-oxybis (2-naphthalene-sulfonic acid), not more than 1.0 percent.
Lead (as Pb), not more than 10 parts per million.
Arsenic (as As), not more than 3 parts per million.
Total color, not less than 85.0 percent.
21 C.F.R. §74.340