... or nearly white, crystalline powder or granules having a strong acid taste.Assay(as C4H6O5)99.0%~100.5%Specific Rotation ... Matter0.1%MaxArsenic(as As2O3)4.0mg/kg MaxUsageDL-Malic acid can be used as an acidulant in cool drinks (including ... emulsion stabilizer of egg yolk. DL-Malic acid also can be used as pharmaceutical intermediate, cosmetic, rinse, metal cleaner, buffering agent, retarder ...