21 C.F.R. § 172.832
A food additive that is a mixture of glyceryl monooleate and its citric acid monoester manufactured by the reaction of glyceryl monooleate with citric acid under controlled conditions may be safely used as a synergist and solubilizer for antioxidants in oils and fats, when used in accordance with the conditions prescribed in this section.
(a) The food additive meets the following specifications:
Acid number, 70-100. Total citric acid (free and combined), 14 percent-17 percent.
(c) To assure safe use of the additive: