Sodium Metasilicate Pentahydrate

Synonym(s)

: Sodium metasilicate, waterglass, disodium metasilicate

Mol. Formula

: H10Na2O8Si

EC / List no.

: 12001-15-9

CAS no.

: 10213-79-3

Molecular weight

: 212,14

Sodium metasilicate pentahydrate is an aqueous chemical material containing sodium and metasilicic acid.

Application

» This substance is used in corrosion inhibitors and anti-scale agents, solvents (for cleaning and degreasing).
» This substance is used in the following products: washing and cleaning products, cosmetics and personal care products, adhesives, sealants, air care products, biocides (e.g. disinfectants, pest control products), coating products, finger paints, non-metallic surface treatment products, and varnishes and waxes.
» Used in machine wash liquids/detergents, automotive care products, paints and coatings or adhesives, fragrances and air fresheners.

Product Specifications

Physical and Chemical Properties
» Sodium silicate appears as a colorless powder.

Properties

Characteristics	Unit	Value	Condition
Melting point	°C	1089
Density	g/ cm³	2.61	20 °C
Solubility	g/L	210	20 °C, Soluble with water
pKa		9.9-12	30 °C
Corrosivity		Corrosive
Refractive index		1.520