L-Malic Acid CAS No. 97-67-6 L- (-) -Malic Acid

L-Malic Acid CAS No. 97-67-6 L- (-) -Malic Acid

Malic acid, also known as 2-hydroxysuccinic acid, has two stereoisomers due to an asymmetric carbon atom in the molecule. In nature, it exists in three forms, namely D-malic acid, L-malic acid and a mixture thereof DL-malic acid. White crystal or crystalline powder, which has strong hygroscopicity and is easily soluble in water and ethanol. Have a special pleasant sour taste. Malic acid is mainly used in the food and pharmaceutical industries.

Description

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Product Description

Malic acid, also known as 2-hydroxysuccinic acid, has two stereoisomers due to an asymmetric carbon atom in the molecule. In nature, it exists in three forms, namely D-malic acid, L-malic acid and a mixture thereof DL-malic acid.
White crystal or crystalline powder, which has strong hygroscopicity and is easily soluble in water and ethanol. Have a special pleasant sour taste.Malic acid is stable under normal conditions and hygroscopic when humidity is high


Product Parameter

Test Requirement Result
ASSAY (%) 99.0 –100.5 99.2
SPECIFIC ROTATION –0.1 -- +0.1 0
MELTING RANGE (℃) 127-132 130
WATER INSOLUBLES (%) MAX 0.1 0.01
SULPHATED ASH(%) MAX 0.1 0.06
FUMARIC ACID (%) MAX 1.0 0.56
MALEIC ACID(%) MAX 0.05 0.01
HEAVY METALS PPM NMT 10 <10
ARSENIC PPM MAX 2 <2
LEAD PPM MAX 2 <2
MERCURY PPM MAX 1 <1
IDENTIFICATION TEST IR ABSORPTION COMFORMED
Conclusion The product complies with the standard above.


Application

5
Malic acid is mainly used in the food and pharmaceutical industries.

DL malic acid is used as an acid stabilizer, a color retention agent, a preservative, and an

emulsion stabilizer for egg yolk, etc. in the food industry. DL malic acid is also used in

pharmaceuticals.



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