Lyophilized powder is an aseptic powder injection made by freezing liquid into solid state and vacuuming water into sublimation and drying. In the low temperature environment to extract the water in the liquid medicine, retain its original drug effect.
1. Effectively prevent the change of physical and chemical properties of the product, the damage to the structure and characteristics of biological tissues and cells is small, so that it quickly enters the dormant state, and effectively protect the stability of the active ingredients of many heat-sensitive pharmaceutical biological products. Such as protein, microorganism will not denaturate and lose its biological activity;
2. Freeze-dried products are loose in shape and basically unchanged in color after drying. After adding water, they can quickly dissolve and restore the physical and chemical properties and biological activity of the original aqueous solution.
3. Because drying is carried out under vacuum conditions, it has a good protective effect on some easily oxidized substances.
4. The water content of products is very low after freeze-drying, which improves the stability of products and reduces the chance of contamination, which not only facilitates transportation but also extends the shelf life of products.