What is the difference between L- MALIC ACID and DL-MALIC ACID (2025)

Malic acid, is also named 2-hydroxy butane diacid, it has an Asymmetric carbon atoms in the molecule,so it has two stereo isomer.There are 3 forms in the nature: D-Malic Acid, L-Malic Acid, and Mixture of DL-Malic Acid .

1、D-Malic Acid: Density:1.595; Melting point:101℃. Decomposition point:140℃; Specific rotation:+2.92°. water - soluble , methanol, ethanol, acetone.

2、L-Malic Acid: Density:1.595; Melting point:101℃. Decomposition point:140℃; Specific rotation:-2.3°(8.5 g / 100 ml water) .water - soluble , methanol, acetone, dioxane, benzene- insoluble.

3、The equal amount of dextro isomer and leavo isomer mixed to get raceme (DL-Malic Acid), Density: 1.601; Melting point: 131-132℃. Decomposition point: 150℃. water - soluble, ethanol, dioxane, acetone, benzene- insoluble.

L - Malic Acid, exists in immature hawthorn, apple, and grape’s pulp. And also can be made of fumaric acid by fermentation. Cause it is easy to be absorbed by human body.It is easy to be absorbed by human body,thus it is very important intermediate of human internal circulation.The excellent performance of food additives and functional foods, it has been widely used in food, cosmetics, medical and health care products, etc. Racemate can be made in the high temperature, high pressure conditions and water vapor effect by fumaric acid or maleic acid under the action of catalyst.

DL-Malic Acid is now recognized as a safe food additive, sour agent, preservative and PH regulator, the acidity is soft and persistence , acidity is 20% stronger than citric acid .it can be used for all kinds of food, according to production need to use appropriately.