Food industry is used as sour agent, color retention agent, preservative and emulsifying stabilizer of egg yolk, etc. It is also used in pharmaceutical industry. L-malic acid is generally considered to have important physiological functions, but half of the D-forms of D L-malic acid are physiologically ineffective.
The chemical industry can be used as one of the raw materials for detergents and fluorescent brighteners. Added to shellac varnishes or other varnishes to prevent the surface from crusting, polyester resins and alkyd resins produced with this acid are plastics for special purposes.
Quality index editor：
According to the standard of Japanese food additives, malic acid should meet the following quality criteria: content (> 99.0% (mass), solubility, clarification of aqueous solution, melting point (> 127-130), heavy metal (> 0.002% (mass), chloride (> 0.0035% (mass), iron (> 0.004%) and burning residue (> 0.05% (mass).
According to the Code of Edible Chemicals (1983), malic acid should meet the following quality criteria: content (> 99.5%). Melting point 130-132 C, ash < 0.1% (mass), heavy metal (> 0.002% (mass), arsenic (> 0.0003% (mass), lead < 0.001% (mass), fumaric acid < 0.5% (mass), maleic acid < 0.05% (mass), water insoluble < 0.1 (mass).
Take this product about 0.5 g, add water 10 ml to dissolve, adjust pH value to neutral with ammonia water, add 1% p-Aminobenzene Sulfonic Acid Solution 1 ml, heat in boiling water bath for 5 minutes, add 20% sodium nitrite solution 5 ml, heat in water bath for 3 minutes, add 4% sodium hydroxide solution 5 ml, the solution should be immediately red.
-0.1 ~ +0.1
This lot of goods is in conformity with the requirments of E296/FCC9.
Payment term: T/T 30% in advance and T/T 70% against copy of B/L. or 100% L/C at sight.
Shipment time: Within 3 weeks after confirming order.
We take photos of every stage of the process and can send them to you. Before we ship the container, you will have photos and lab test results.
Provide quality after-sale service once the container is received.
In case the product is damaged, we will refund you or resend a new packaging.
Also, if the goods are not as per your specification, we will callback the container at our cost, or compensate you as per our agreement.
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