SUBPART C. SELF-RISING FLOUR
§851. Contents of self-rising flour
Self-rising flour is a combination of flour, salt, and chemical leavening ingredients. The flour shall be of the grade of "straight" or better and the chemical leavening ingredients shall be bicarbonate of soda and either calcium acid, phosphate, sodium, aluminum sulphate, cream of tartar, tartaric acid, or a combination of these.