Colorless crystals or white particles. No smell. Decompose above 280 ℃. Solubility in water: 70.6g at 0 ℃, 103.8g at 100 ℃. Insoluble in ethanol and acetone. The pH of 0.1mol/l aqueous solution is 5.5. Relative density 1.77. Refractive index 1.521. Ammonium sulfate is mainly used as fertilizer and is suitable for all kinds of soil and crops. It can also be used in textile, leather, medicine and so on.
An excellent nitrogen fertilizer (commonly known as Feitian powder) is suitable for general soil and crops. It can make branches and leaves grow vigorously, improve fruit quality and yield, enhance crop resistance to disasters, and can be used as base fertilizer, topdressing and seed fertilizer. It can carry out double decomposition reaction with table salt to produce ammonium chloride, react with aluminum sulfate to produce ammonium alum, and manufacture refractory together with boric acid. Adding to the electroplating solution can increase the conductivity. It is also a catalyst for food brown color, a nitrogen source for culturing yeast in fresh yeast production, a dyeing aid for acid dyes, and a leather deashing agent. In addition, it is also used in beer brewing, chemical reagent and battery production. Another important role is to mine rare earth. Ammonium sulfate is used as raw material for mining, and the rare earth elements in the ore soil are exchanged in the form of ion exchange, and then the leaching solution is collected to remove impurities, precipitate, press and burn to form rare earth raw ore. about 5 tons of ammonium sulfate are required for each ton of rare earth raw ore.
There are many biological uses, mostly used in protein purification process, because ammonium sulfate is an inert substance, which is not easy to react with other bioactive substances, and can protect protein activity to a great extent in the purification process. In addition, ammonium sulfate has excellent solubility and can form a high salt environment to prepare for protein precipitation and subsequent high salt purification. The solubility of ammonium sulfate at 0 ℃ is quite different from that at 25 ℃ at room temperature. The following are the molar concentrations of ammonium sulfate at different saturations at two temperatures.
Packing: 25kg / 50kg
Executive standard: GB535-1995 / xg1-2003