TNN Malic acid
Review
Description
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
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.
