It is yellow or orange yellow crystalline powder, odorless, odorless, almost insoluble in cold water. As the water temperature rises and in acidic or alkaline solution, its solubility increases, but the temperature increases or the pH increases or decreases. All can quickly reduce the folate titers, especially in acidic solutions, and lose more quickly. Folic acid can also be destroyed by UV light, but it has good stability under dry and dark conditions. Sealed packaging can be stored in a cool, dry place for at least one year.
Folic acid has poor stability in premixes and compound feeds. Affected mainly by light and moisture content, the highly absorbable trace minerals such as sulfate, chloride, and choline chloride have a great influence on the potency of folic acid. Therefore, try to avoid compatibility with these substances. Under normal circumstances, folic acid loses 5% to 10% in the production process of premix or dry powder compound feed, and loses 20% to 40% after storage for one month. The comminution, granulation and puffing of fodder have a greater damage to folic acid, with a loss rate of 10% to 50%. Sterilization of canned feeds increases the loss of folic acid as the temperature and time of sterilization increases, and the temperature has a greater impact than time. The general loss rate is between 45% and 55%. The high-temperature sterilization of the dry powder causes almost all the folic acid in the feed to be destroyed, and reducing the water content in the feed can reduce the loss rate of folic acid. Although the stability of the processed folic acid products during the processing and storage of the feed is improved, the loss during the bulking and sterilization of the feed is still large, especially autoclaving.
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