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nature : names hydroxy succinate. White crystals. As a molecule asymmetric carbon atoms, two stereoisomers. (1) S - or R - (+) - malic acid. Density 1.595, the melting point of 100 ° C and 140 ° C decomposition point, specific rotation -2.3 (8.5g/100ml water), soluble in water, methanol, acetone, two dioxane, benzene insoluble. L-contour the body and dextral mix in raceme. The relative density of 1.601; Melting point 131 ~ 132 ° C and 150 ° C decomposition points; Dissolved in water, methanol, ethanol, 1,4 - Dioxane, acetone, benzene insoluble. The most common is the L-body exists in immature hawthorn, apple and grape fruit of the pluses were expected. Also be Fumarate by biological fermentation obtained. BNDADA from fumaric acid or Malay catalyst under high temperature and pressure conditions and water vapor in the system. Malic acid can be used drugs, soft drinks, candy manufacture.
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