Volatile matter (at 135 °C), not more than 1 percent.
Ethyl alcohol-insoluble matter, not more than 0.4 percent.
Phthalic acid, not more than 0.3 percent.
Quinaldine, not more than 0.2 percent.
Subsidiary colors, not more than 5 percent.
Lead (as Pb), not more than 20 parts per million.
Arsenic (as As), not more than 3 parts per million.
Mercury (as Hg), not more than 1 part per million.
Total color, not less than 96 percent.
21 C.F.R. §74.1711