Sodium Metasilicate Pentahydrate 99%

Sodium Metasilicate Pentahydrate 99% (CAS 10213-79-3, molecular formula Na2SiO3·5H2O) is a formulation raw material used by detergent, personal care and industrial cleaning manufacturers who need stable active matter and reproducible performance. China Chemicals supplies it at 99% min in pack sizes from 1 kg through to 1000 kg Bulk Bag, so laboratory trial quantities and full production volumes can be sourced from the same specification.

It is also traded as Metso, Sodium Metasilicate, SMS Pentahydrate. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.

Typical applications

Alkaline builder in industrial degreasers
Bottle washing and dairy CIP formulations
Metal cleaning and paint stripping
Corrosion inhibition for aluminium and zinc
Detergent powder and dishwash tablet manufacture

Technical specification

Chemical name	Sodium Metasilicate Pentahydrate 99%
Synonyms	Metso, Sodium Metasilicate, SMS Pentahydrate
CAS number	10213-79-3
Molecular formula	Na2SiO3·5H2O
Appearance	White free-flowing granules
Assay	99.0% min
SiO2 content	28 – 30%
Na2O content	28 – 30%
pH (1% solution)	12.3 – 12.7
Water insolubles	0.1% max
Iron (Fe)	50 ppm max

Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.

Packaging and supply

Available in 1 kg, 5 kg, 25 kg Bag, 1000 kg Bulk Bag. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.

Handling and safety

Transport classification: UN3253 · Corrosive, Class 8. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.

Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.