| Title of index | Index | Result |
| Colour | White | White |
| Shape | Crystal or crystalline powder | Crystalline powder |
| Odor | Special sour | Special sour |
| Assay | ≥99.0 | 99.1 |
| Residue on ignition, w/% | ≤0.05 | 0.02 |
| Sulfate [So4], w/% | ≤0.02 | <0.02 |
| Chlorider [Cl] | ≤0.004 | <0.004 |
| Fumaric acid, w/% | ≤0.5 | 0.04 |
| Maleic acid, w/% | ≤0.05 | <0.01 |
| Heavy metals [Pb], mg/kg | ≤10.0 | <10.0 |
| Arsenic [As], mg/kg | ≤2.0 | <2.0 |
| Lead pb, mg/kg | ≤2.0 | <2.0 |
Application
(1) L-(-)-Malic Acid is used as sour agent for refreshing beverages and food; tone retainer, preservative for fruit beverages; emulsifying stabilizer
for mayonnaise, etc.
(2) L-(-)-Malic Acid is the raw materials for medicines, cosmetics, dental lotions, metal cleaners, buffers, coagulants for textile industry, industrial
deodorants and fluorescent whiteners.
(3) L-(-)-Malic Acid is used as flavor enhancer, flavor agent, auxiliary drug and pH control agent.
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