DL-malic acid 
 Appearance (Appearance): white crystals triclinic 
 Characters malic acid stable under normal conditions with high humidity and moisture from time to time. Triclinic white crystals. Melting point 130 ℃; the relative density of 1.601; Solubility soluble in methanol, ethanol, acetone and many other polar solvents. The food industry as sourness agent, color retention agents, preservatives and egg yolk emulsion stabilizer, also used in the pharmaceutical