Mono - and diacetyl tartaric acid esters of mono and diglycerides of fatty acids (MDG). The compounds resulting from the esterification of mono- and diglycerides of fatty acids (MDG) with acetylated tartaric acid (E 334) also act as emulsifiers like other glycerol esters of mono- and diglycerides ( E 472a,b, c,d,f). They are authorised in the EU as food additives under the number E 472d.