CAS#87-69-4
Malic acid is internationally recognized as a safe food additive, as sour agents, preservatives and Ph value regulator with its gentle acidity and a long persistence, sour citric acid stronger than 20%. It can be used for various types of food, according ...
Malic acid is internationally recognized as a safe food additive, as sour agents, preservatives and Ph value regulator with its gentle acidity and a long persistence, sour citric acid stronger than 20%. It can be used for various types of food, according to production needs appropriate use.
| Items | Specifications | Results | |
| Appearance | White crystal or white crystalline powder, odorless, tasteless. | white crystalline powder, odorless,tasteless. | |
| Solubility | It is very soluble in water, freely soluble in ethanol or acetone. | Complies | |
| Specific rotation | -1.6°～-2.6° | -1.9° | |
| Identification | Chemical identification: Positive reaction | Complies | |
| IR: Complies | Complies | ||
| pH | 1.5～2.0 | 1.8 | |
| Clarity and color of solution | Solution should be clear and colorless. | Complies | |
| Light transmittance | 98% | 100% | |
| Insoluble matter in water | ≤0.1% | 0.02% | |
| Related substance | Maleic acid≤0.01% | Not detected | |
| Fumaric acid≤0.10% | 0.00% | ||
| Other maximum unknown impurity≤0.05% | 0.01% | ||
| Other total impurities<0.20% | 0.01% | ||
| Residual solvent | Tetrahydrofuran≤0.072% | Not detected | |
| Ethyl acetate≤0.5% | 0.06% | ||
| Dichloromethane≤0.06% | 0.01% | ||
| Water | ≤2.0% | 0.25% | |
| Calcium salt | ≤0.02% | Complies | |
| Readily oxidizable substance | Should conform | Complies | |
| Chloride | ≤0.005% | Complies | |
| Sulfate | ≤0.01% | Complies | |
| Arsenic salt | ≤0.0001% | Complies | |
| Residue on ignition | ≤0.1% | 0.01% | |
| Arsenic salt | ≤0.0003% | Complies | |
| Heavy metals | ≤10ppm | Complies | |
| Bacterial endotoxin | ≤0.043EU/mg | Complies | |
| Microbial limit | Total aerobic microbial count(TAMC):≤1000cfu/g | Complies | |
| Total yeast and mould count(TYMC): ≤100cfu/g | |||
| Escherichia coli: Should not exist | |||
| Assay | ≥99.0% | 100.70% | |
| Conclusion | Complies with the requirement of | Conclusion | |
| specification protocol of L-malic acid | |||
| Containers and storage | Containers—Tight containers Storage—Light-resistant and cool place | ||
L(+)-tartaric acid is widely used as a sour agent in beverages and other foods, in wine, soft drinks, confectionery, bread, and certain gelatinous sweets.
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