Industrial salt, chemical formula NaCl, colorless cubic crystal or fine crystalline powder, salty. The appearance is white crystal, and its source is mainly seawater. soluble in water. Impure sodium chloride is deliquescent in air. The stability is relatively good, and its aqueous solution is neutral.
Industrial salt has many uses, mainly used in the fields of alkali production, boiler soft water, dyes, soap and feed processing. Industrial salt contains more heavy metals. And salt is an essential ingredient in our daily life. Because the appearances of the two are very similar, there are many unscrupulous vendors selling sheep's head to sell dog meat.
So how do you distinguish between the two?
1. You can first observe the particle size and color of the salt. Generally speaking, industrial salt particles are larger and contain more impurities, so they will appear coarse. Most of the edible salt added with iodine is small in size and white in color.
2. See if iodine is added. Except for a few high iodine areas, edible salt is generally iodized. A simple way to determine whether iodine is added is to wash the potatoes with a higher concentration of water droplets into the salt. If the color changes, it is iodine-containing, otherwise it is not.
3. In terms of taste, industrial salt has a slightly salty taste, and salt has a heavier salty taste.
The main applications of industrial salt are:
1. The raw materials commonly used in the dye industry such as soda ash are directly produced from salt, and almost every step in the dye production process consumes a certain amount of salt.
2.In the metallurgical industry, salt is used as a chlorinated roaster and quencher in the metallurgical industry.
3. Soda ash made from salt is the main raw material for glass in the building materials industry.
4. When casting in the machinery industry, salt can be used as an excellent binder for non-ferrous metals and alloy casting medium sand.
5. During the drilling of oil wells, in order to protect the integrity of the rock salt core, it is necessary to add salt to the mud as a stabilizer.
6. In the soap industry in the light industry, in order to maintain the proper viscosity of the solution, salt is often added.