21 C.F.R. § 172.235 Morpholine.
Title 21 - Food and Drugs
Morpholine may be safely used as a component of food, subject to the following restrictions. (a) It is used as the salt(s) of one or more of the fatty acids meeting the requirements of §172.860, as a component of protective coatings applied to fresh fruits and vegetables. (b) It is used at a level not in excess of that reasonably required to produce its intended effect.
Title 21: Food and Drugs
PART 172—FOOD ADDITIVES PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION
Subpart C—Coatings, Films and Related Substances
§ 172.235 Morpholine.

