172.856—Propylene glycol mono- and diesters of fats and fatty acids.
         Propylene glycol mono- and diesters of fats and fatty acids may be safely used in food, subject to the following prescribed conditions:
    
    
        
        (a) 
         They are produced from edible fats and/or fatty acids in compliance with  § 172.860 and/or oleic acid derived from tall oil fatty acids in compliance with  § 172.862.
    
    
        
        (b) 
         They are used in food in amounts not in excess of that reasonably required to produce their intended effect.