1. I. Details of food-grade ammonium sulfate:
Implementation quality index: GB29206-20 12|FCCVII.
Food grade ammonium sulfate. : 7783-20-2
Molecular formula: (NH4)2SO4
Molecular weight: 132.5438+04
Properties: Colorless crystals or white particles. No taste. Decomposition above 280℃. Solubility in water: 41.22g at 0℃, 43.47g at 25℃ and 50.42g at 100℃. Insoluble in ethanol and acetone. The pH value is 5.5. The relative density is 1.77.
Uses: processing AIDS; Water softener; Yeast food.
Packing: lined with polyethylene plastic bags and covered with plastic woven bags, each bag is 25 kg.
Storage and transportation: it should be stored in a dry, ventilated and clean warehouse, and should be handled lightly to prevent moisture and heat. During transportation, stay away from toxic substances.
The content is 99.0- 100.5%
Selenium ≤ 0.003%
Residue on ignition ≤0.25%
Arsenic ≤0.0003%
Lead ≤ 0.0003%
2. Then introduce the common ammonium sulfate:
Ammonium sulfate: colorless crystals or white particles. No taste. Decomposition above 280℃. Solubility in water: 70.6g at 0℃, 100℃ and103.8 g, insoluble in ethanol and acetone. The pH value of 0. 1mol/L aqueous solution is 5.5. The relative density is 1.77. The refractive index is 1.5 1. Ammonium sulfate is mainly used as fertilizer, which is suitable for various soils and crops. It can also be used in textiles, leather and medicine. (It is essentially a substance with basically the same shape)
Ordinary ammonium sulfate is an excellent nitrogen fertilizer (commonly known as fertilizer powder), which is suitable for general soil and crops. It can make branches and leaves grow vigorously, improve fruit quality and yield, and enhance the disaster resistance of crops. It can be used as base fertilizer, topdressing and seed fertilizer. It can react with salt to produce ammonium chloride, react with aluminum sulfate to produce ammonium alum, and make refractory with boric acid. Adding it to the electroplating solution can increase the conductivity. It is also a catalyst for the color of food soy sauce, a nitrogen source for cultivating yeast in the production of fresh yeast, an acid dye dyeing assistant and a leather deashing agent. In addition, it is also used in beer brewing, chemical reagents and battery production. Another important role is the exploitation of rare earths. Using ammonium sulfate as raw material, rare earth elements in ore soil are exchanged by ion exchange, and then the leaching solution is collected for impurity removal, precipitation, pressing and calcination to form rare earth ore. Mining and producing 1 ton of rare earth ore requires about 12 ton of ammonium sulfate.
Summary: Food-grade ammonium sulfate is refined, and its harmful substances such as heavy metals must meet the national standard GB29206-20 12|FCCVII before it can be used as a food processing aid. As a chemical fertilizer, ordinary ammonium sulfate contains a lot of heavy metals and other components, so it cannot be directly used with food processing additives. Ordinary ammonium sulfate can only be used as fertilizer or industrial use.