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Ammonium acetate is also called "ammonium acetate". Chemical formula nh4c2h3o2. Molecular weight 77.08. White crystal. Melting point 114 ℃, relative density 1.17. Decomposition in high temperature and hot water. Soluble in ethanol, soluble in water, slightly soluble in acetone. Ammonia is easily lost in the air. It is obtained by the interaction of glacial acetic acid and ammonia. In recent years, with the development of pharmaceutical industry, the demand for high purity and low water ammonium acetate has increased dramatically. At present, ammonium acetate has analytical purity, superior purity, pharmaceutical grade and industrial grade, far from meeting the requirements of the pharmaceutical industry. The reason is that the content is low (97% - 98), the pH range is unsatisfactory, the water content is high, the water is easy to be deliquesced, and the storage is difficult. Once the water is absorbed in the storage process, the product can't be treated twice at all. Because it can't be used continuously, it is discarded, resulting in a lot of waste and serious environmental pollution. According to the analysis, the reason why ammonium acetate is easy to absorb moisture is that there is a certain amount of water in the finished product of ammonium acetate. Even the water content of analytical pure, superior grade and reagent grade ammonium acetate is about 2% - 3%. Therefore, ammonium acetate is easy to absorb moisture in the process of storage and use, so it is urgent to study and prepare high purity and low water ammonium acetate.
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