The present invention relates to an aqueous dental composition having a pH of less than 7 as well as to the use of a stabilizer for the preparation of an aqueous dental composition having a pH of less than 7. In particular, the present invention relates to an aqueous dental composition having a pH of less than 7 comprising (i) one or more polymerizable compounds having at least one polymerizable double bond； (ii) a polymerization initiator system containing a) an 1,2-diketone photoinitiator compound having a light absorption maximum in the range from 300 to 500 nm； and b) a coinitiator compound； (iii) a stabilizer of the following formula (I) and/or (II), wherein the Rs, which may be the same or different, independently represent a branched C
