Nomenclature
CAS number: 1312-76-1
Soluble potash glass; soluble potash water glass.
Description and references
Variable composition: K2Si2O5 to K2Si3O7;
may also contain water.
Properties
Colorless or yellowish, translucent to transparent,
hygroscopic, glass-like pieces; strong alkaline reaction. Usually
very slowly sol in cold water, or depending on the composition, almost
insol. More readily sol in water when heated with it under pressure.
Insol in alcohol; dec by acids with precipitation of silica. Keep well closed.Use
As binder (
e.g., in carbon electrodes,
lead pencils, protective coatings, insol pigments); detergent, in
glass and ceramics manuf.