Moisture, not more than 0.5 percent.
Nitrogen, not less than 0.2 percent and not more than 0.3 percent.
Total copper, not less than 0.2 percent and not more than 0.4 percent.
Free copper, not more than 200 parts per million.
Lead, not more than 20 parts per million.
Arsenic, not more than 5 parts per million.
Sulfated ash, not more than 2.5 percent.
Total color, not less than 4.5 percent and not more than 5.5 percent.
21 C.F.R. §73.3110