|
1、 product nature
caustic soda is also known as caustic soda and caustic soda. its molecular formula is naoh, its molecular weight is 39.99, and its specific gravity is 2.13 (20 ℃ ~ 40 ℃). 32% ion-exchange membrane caustic soda is a colorless and transparent liquid. flake caustic soda is a white or slightly colored solid, which is easily soluble in water. its solubility increases with the increase of temperature. the freezing point of caustic soda solution varies with temperature. the freezing point of 32% caustic soda is 4 ℃ and that of 50% caustic soda is 11 ℃. caustic soda is a strong alkaline substance. its chemical properties are very active. it can make litmus indicator blue and phenolphthalein indicator red. caustic soda can corrode human skin. the higher the concentration is, the higher the degree of corrosion will be. especially, it will cause serious damage to people's eyes and emit a lot of heat when meeting water.
2、 quality standard
|
sodium hydroxide
|
sodium carbonate
|
ferric oxide
|
sodium chloride
|
|
≥30%
|
≤0.2%
|
≤0.001%
|
≤0.008%
|
|
≥45%
|
≤0.4%
|
≤0.003%
|
≤0.03%
|
|
≥50%
|
≤0.5%
|
≤0.005%
|
≤0.05%
|
3、 main uses
caustic soda is a basic chemical raw material, which is widely used in light industry, textile industry, metallurgy, chemical industry and other departments, and plays an important role in the national economy. in addition, in the production of dyes, plastics, pharmaceuticals and organic intermediates, the regeneration of old rubber, the electrolysis of sodium metal and water, and the production of inorganic salts, the preparation of borax, chromium salt, manganate, phosphate, etc., also requires a large amount of caustic soda.
4、 storage and transportation;
30% and 50% liquid caustic soda are stored in 30% caustic soda tank and 50% caustic soda tank farm, and transported by special liquid alkali truck for chemical industry.
5、 health tips
skin contact: rinse immediately with plenty of water, and then apply 3% - 5% boric acid solution.
eye contact: immediately lift the eyelid, rinse with flowing water or normal saline for at least 15 minutes, or wash with 3% boric acid solution, and seek medical advice.
inhalation: quickly leave the scene to a place with fresh air. if necessary, carry out artificial respiration and seek medical advice.
ingestion: the poison in the mouth should be cleaned with protein and other directors as soon as possible.
|