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Vitamin A additives are an important type of vitamin additives, and they are used to supplement vitamin-deficient nutrients in feed.

Vitamin A additives

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Vitamin A additives are an important type of vitamin additives, and they are used to supplement vitamin-deficient nutrients in feed.

Chinese name

Vitamin A additives

Category

Vitamin additives

Process characteristics

Microcapsule technology

Storage conditions

Sealed, protected from light and moisture

The pure compound of vitamin A is retinol, which is easily destroyed. Therefore, the first step in making a vitamin A additive is to first esterify it. "Esterification" contributes to the stability of the vitamin A additive. Organic acids for esterification of vitamin A, commonly used are acetic acid, propionic acid and palmitic acid.

The activity of vitamin A is expressed in "international units". Because the molecular weight of the organic acid used in the esterification is different, the corresponding weight of an international unit is also different. Vitamin A additives are mostly made from vitamin A acetate, and vitamin A palmitate is also used more.

Vitamin A is relatively easy to break even after esterification, so further processing is needed. The manufacturing process of vitamin additives is relatively complicated. Each manufacturer has its own selected process plan. Generally, microcapsule technology is used, and some use adsorption methods.

Other manufacturers use double emulsification technology and coat with starch to make fine particles, which can be dispersed in water and mixed with drinking water for feeding. Vitamin A additives have different particle sizes due to different process conditions. Although it is generally stipulated in foreign countries between 0.1 and 1.0 millimeters, in fact it is usually between 0.177 and 0.590 millimeters. Vitamin A additives that can be dispersed in water, the particle size is smaller, the maximum should not exceed 0.35 mm.

The content of active ingredients of vitamin A additives is usually 500,000 IU / g, and most of them are made from vitamin A acetate raw materials. There are also 650,000 international units per gram and 200,000 international units per gram. When purchasing and applying vitamin A additives, you must know how many international units per gram. The number of SI units signifies the amount of active ingredients.

The melting point of vitamin A acetate is 57.3-58.4 ° C, and the melting point of vitamin A palmitate is 27.8-28.9 ° C. Both UV and oxygen can cause the breakdown of Vitamin A acetate and Vitamin A palmitate. When humidity and temperature are high, rare metal salts can accelerate the decomposition rate. Ferrous sulfate containing 7 waters is a serious loss of vitamin A acetate activity.

The storage conditions of vitamin A additives require that the container be sealed, protected from light, protected from humidity, humidity is below 20 ° C, and the temperature difference changes little. Stored under these conditions for one year, it can still be used with little loss. According to tests, if stored under hot conditions (35 ° C) for two months, 10% can be lost, 40% can be lost for 12 months, and 75% can be lost for 24 months.

Vitamin A additive is an important one of vitamin additives and is widely used in the feed additive industry. The reasonable addition of vitamins will greatly promote the healthy growth and development of reared animals, and producers will get better economic benefits. Nowadays, with the development of e-commerce and the increase in the number of vitamin additive product manufacturers, the feed additive market has gradually transitioned to the e-commerce market. More users and manufacturers prefer to use the animal husbandry trade websites such as China Animal Husbandry Street to conduct feed and vitamin additive products. Display, trade, and choose vitamin additive products that are suitable for your own animals.