Sweetened condensed milk, for which a standard of identity has been established in 21 CFR 131.120, must contain not less than 28 percent by weight of total milk solids and not less than eight percent by weight of milk fat. Sweetened condensed skimmed milk (21 CFR 131.122) must contain not more than 0.5 percent by weight of milk fat unless otherwise indicated and not less than 24 percent by weight of total milk solids. The quantity of nutritive carbohydrate sweeteners used in sweetened condensed milk products must be sufficient to prevent spoilage.
Source: Excerpted from Requirements of Laws and Regulations Enforced by the U.S. Food and Drug Administration (1997).