Sodium metasilicate

English name:Sodium metasilicate
CAS No.:6834-92-0
Molecular formula:Na2O3Si
Molecular weight:122.06
EINECS No.:215-687-4

Melting point:1089°C
Density:2.4
Refractive index:nD25(glass)1.520
Shape: powder
Colour: White
Specific gravity: 2.61PH 11(1mMsolution);11.91(10mMsolution);12.62(100mMsolution)Water solubility.
Solubleincoldwater.Hydrolyzesinhotwater.Insolubleinacids,alcoholandsaltsolutions.
Hydrolyzesinhotwater.Insolubleinacids,alcoholandsaltsolutions. Hydrolysis sensitivity:sex0:formsstableaqueoussolutionsMerck14,8642
Stability:hygroscopicInChIKeyNTHWMYGWWRZVTN-UHFFFAOYSA-NCAS
Overview: Sodium metasilicate is a salt of silicic acid, belongs to inorganic salt products, molecular formula Na2SiO3-nH2O, is a non-toxic, tasteless, harmless white powder or crystalline particles, easily soluble in water, insoluble in alcohols and acids, aqueous solution is alkaline, placed in the air is easy to absorb moisture and deliquescence, with descaling, emulsification, dispersion, wetting, permeability and buffering ability to PH value, is listed as a national It is listed as one of the "priority fine chemicals for development in China" and one of the "key inorganic chemical products for development in China in the future". Sodium metasilicate is a low molecular crystal made by the hydrothermal reaction of common alkali and caustic soda, the commodity has anhydrous, pentahydrate and nine-hydrate, of which the nine-hydrate only exists in our market. It is being phased out as it easily becomes liquid or paste-like when stored, but due to some user habits and some fields not caring much about crystalline water, sodium metasilicate nine-water still has a certain market. Among inorganic electrolytes, sodium metasilicate has the highest active alkalinity and PH buffering index, strong wetting, emulsifying and saponifying effect on fats and oils, excellent performance in removing, dispersing and suspending dirt, and preventing redeposition of dirt, strong detergency and buffering capacity, neutralising acidic dirt, emulsifying fats and oils, anti-flocculating effect on inorganic substances, anti-corrosive effect on metals, and can replace Sodium tripolyphosphate is used in the synthesis of high efficiency detergents and metal cleaners, reducing the pollution of the environment by sodium tripolyphosphate. The application of sodium metasilicate in detergents has been used abroad for more than 40 years and the application technology is relatively mature; it has also been used in detergents and other industries in China for more than 20 years and is a mature chemical product with a mature and broad market. Sodium metasilicate has a large number of applications in detergents, ceramics, electroplating, textiles, printing and dyeing, paper making, cement, concrete, refractory materials, oil and leather processing and other industrial fields. The industries with a large number of applications are: ceramics, industrial cleaning, detergents, concrete, printing and dyeing, paper making, cement, oil extraction, others.