Sum of volatile matter (at 135 °C) and chlorides and sulfates (calculated as sodium salts), not more than 15.0 percent.
Water-insoluble matter, not more than 0.2 percent.
Leuco base, not more than 5 percent.
Sum of o-, m-, and p-sulfobenzaldehydes, not more than 1.5 percent.
N-Ethyl,N-(m-sulfobenzyl)sulfanilic acid, not more than 0.3 percent.
Subsidiary colors, not more than 6.0 percent.
Chromium (as Cr), not more than 50 parts per million.
Manganese (as Mn), not more than 100 parts per million.
Arsenic (as As), not more than 3 parts per million.
Lead (as Pb), not more than 10 parts per million.
Total color, not less than 85.0 percent.
21 C.F.R. §74.101