Acidifier
It is divided into organic acid, inorganic acid, and complex acidifier, which can improve the intestinal environment, increase the substance conversion rate, inhibit the harmful bacteria in the intestinal tract, and promote the growth of animals.

 
The food industry is used as an acid stabilizer, a color retention agent, a preservative, an emulsion stabilizer for egg yolk, etc., and is also used in pharmaceuticals. L-malic acid is generally considered to have important physiological functions, but half of D-form in D L-malic acid is physiologically ineffective.
The chemical industry can be used as one of the synthetic raw materials for detergents and fluorescent whitening agents. It is added to shellac varnish or other varnish to prevent the paint from crusting. Polyester resin and alkyd resin produced from this acid are special plastics.