21 C.F.R. § 172.818
The food additive oxystearin may be safely used in foods, when such use is not precluded by standards of identity in accordance with the following conditions:
(a) The additive is a mixture of the glycerides of partially oxidized stearic and other fatty acids obtained by heating hydrogenated cottonseed or soybean oil under controlled conditions, in the presence of air and a suitable catalyst which is not a food additive as so defined. The resultant product meets the following specifications:
Acid number: Maximum 15. Iodine number: Maximum 15. Saponification number: 225-240. Hydroxyl number: 30-45. Unsaponifiable material: Maximum 0.8 percent. Refractive index (butyro): 60±1 at 48 °C.
(c) To insure safe use of the additive, the label and labeling of the additive container shall bear, in addition to the other information required by the Act: