Malic acid
 

Malic acid is also called 2-hydroxy-butanedioic acid,one unequal carbon atom exists in molecule and two kinds of stereisomers.There are three kinds of them,D-malic acid,L-malic acid and DL-malic acid in nature. It is a white crystal powder and strong hygroscopic . It dissolves in water and ethyl alcohol. It has pleasant acid flavor. It is mainly used in food and pharmaceuticals industry.


ITEM

UNIT

CONFORM

ASSAY

%

MIN99.0

FUMARIC ACID

-%

MAX1.0

MALEIC ACID

%

MAX0.05

WATER INSOLUBLES

%

MAX0.1

RESIDUE ON IGNITION

%

MAX0.1

HEAVY METALS 

PPM

MAX10

ARSENIC 

PPM

MAX2

CHLORIDE

PPM

MAX100

SPECIFIC ROTATION

---

-0.1------+0.1

 
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