1-ketopropionaldehyde; 2-ketopropionaldehyde; 2-Oxopropanal; 2-oxopropionaldehyde; acetylformaldehyde; acetylformyl; alpha-ketopropionaldehyde; propanedione; propanolone; pyroracemic aldehyde; pyruvaldehyde; Pyruvic aldehyde; Pyruvic aldehyde, 40 wt% solution in water;