Disodium hydrogen phosphate can be regarded as a product obtained by using phosphate H3PO4 as the parent substance and replacing all three hydrogen ions H+ contained in its molecular formula with three metal sodium atoms Na. Because phosphate H3PO4 is a tribasic acid, its molecular formula has three hydrogen ions that can be replaced by gold elements. It is easy to weather in the air. When placed in the air at room temperature, it loses about 5 crystal water and forms heptahydrate. When heated to 100°C, it loses all crystal water and becomes anhydrous. It decomposes into sodium pyrophosphate at 250°C.
Disodium hydrogen phosphate can be used to make citric acid, water softener, fabric weighting agent, fire retardant, flame retardant for wood and paper, and used in glaze, welding flux, pigments and the manufacture of sodium pyrophosphate and Raw materials for other phosphates. Used in the production of detergents, cleaning agents for printing plates and mordants for dyeing. Used as industrial water quality treatment agent, quality improver, neutralizing agent silicone oil emulsion, antibiotic culture agent, and biochemical treatment agent. In the printing and dyeing industry, it is used as a stabilizer for hydrogen peroxide bleaching and as a filler for rayon (to enhance the strength and elasticity of the silk). Also used for electroplating and leather blending.
Isoparaffins
Application fields
1. Used as a quality improver, it can improve the complex metal ions, pH value, ionic strength, etc. of food, thus improving the binding force and water retention of food. China stipulates that it can be used in cheese, with a maximum usage of 5g/kg; in Western ham, meat, fish, shrimp and crab, the maximum usage is 3.0g/kg; in cans, juices, beverages and dairy products, the maximum usage is 0.5g /kg.
2. Used as water softeners and detergents, boiler anti-scaling agents, water softeners in paper dyeing, and pH buffers for adhesives used in waxed paper production in the chemical, textile, printing and dyeing, papermaking and power generation industries. Colorants in printing and dyeing, mercerizing enhancers for fabrics, and anti-brittle agents for thread making. It is used in the metallurgical industry for chemical degreasing and as an excellent accelerator in photographic developing solutions. Ya detergent and bottle detergent. Coagulant and sugar juice of rubber latex. Phosphate plays a role in quality improvement in the food processing industry. For example, in meat products, it maintains the water-holding capacity of the meat and increases the binding force, thereby reducing the loss of nutrients in the meat and preserving the tenderness of the meat. It is also used as emulsifier, nutritional supplement and quality improver in food processing. It is a raw material for preparing alkaline water for pasta and is used for sugar refining and a-starch manufacturing. It is also used as a detergent for food bottles, cans, etc.
3. It is a strong base and weak acid salt, with strong alkalinity and high solubility. It has stable chemical properties and can be stored for a long time. Adding TSP to the spray water of the containment spray system (EAS) instead of NaOH can adjust the spray. The pH value of the shower liquid can effectively remove the iodine gas released from the leaked cooling water into the containment vessel, thus avoiding the harm of strong alkali to the staff and making it easier to clean up after the accident.
