Physical state, solid.
1 percent solution in chloroform, complete and clear.
Melting range (decomposition), 207 °C. to 212 °C. (corrected).
Loss on drying, not more than 0.2 percent.
Residue on ignition, not more than 0.2 percent.
Total carotenoids other than trans-canthaxanthin, not more than 5 percent.
Lead, not more than 10 parts per million.
Arsenic, not more than 3 parts per million.
Mercury, not more than 1 part per million.
Assay, 96 to 101 percent.
21 C.F.R. §73.75