U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
(a) Specific gravity at 25 °C. 0.955 to 0.965.
(b) Refractive index at 20 °C. 1.495 to 1.500.
(c) Angular rotation. -57° to -62°.
(d) Assay. Not less than 97.0 percent.
