307815

Sodium metasilicate

• Synonym(s): Disodium metasilicate, Disodium silicate, Sodium silicate, Sodium silicon oxide
• Linear Formula: Na₂SiO₃
• CAS Number: 6834-92-0
• Molecular Weight: 122.06
• EC Number: 229-912-9
• MDL number: MFCD00003492
• UNSPSC Code: 12352302
• PubChem Substance ID: 24858628
• NACRES: NA.22

Properties

• composition: SiO₂, 50-53%
• Quality Level: 200
• SMILES string: [Na+].[Na+].[O-][Si]([O-])=O
• InChI: 1S/2Na.O3Si/c;;1-4(2)3/q2*+1;-2
• InChI key: NTHWMYGWWRZVTN-UHFFFAOYSA-N

Description

General description

SMS is a silicon source for silica materials and can be used as a chemical intermediate for silica gel catalysts.

Application

Reactant for:

• Hydrothermal preparation of thorium uranium silicate (Th1-xUxSiO4) uranothorite solid solutions
• Fabrication of dense NaA zeolite coatings
• Reactant for preparation of tungsten modified silica as catalyst for liquid phase oxidation of styrene

Sodium metasilicate (SMS) has been used in the preparation of polypyrrole/sodium metasilicate (PPy/Na₂SiO₃) and polythiophene/sodium metasilicate (PT/Na₂SiO₃) composites, novel high dielectric constant materials for use in power electronic systems.

SMS can also be used:

• To prepare NaZnSiO₃OH, a novel chiral framework material which has potential application in ion exchange, adsorption and catalysis.
• As a low-cost alternative to tetraethyl orthosilicate (TEOS) to synthesize highly ordered mesoporous silicas.
• To prepare geopolymer concrete.

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H290,H314,H335
• pcodes: P234 - P260 - P271 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 8B - Non-combustible corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges