- ▸ Detergents and cleaners: Alkaline builder for powdered and liquid cleaners.
- ▸ Foundry: Mold and core making aid.
- ▸ Pulp and paper: Processing aid in pulp and paper production.
- ▸ Zeolite and silica feedstock: Starting material for silicas and zeolites.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Sodium metasilicate pentahydrate (CAS 10213-79-3) is the pentahydrated alkaline soluble silicate. Industry references record use of alkali-metal silicates as starting materials for silicas and zeolites, in detergents and cleaners, and in pulp and paper production; it is also a foundry mold and core material and a processing aid. The hydrated grade dissolves readily for liquid and powder cleaning formulations.
Frequently Asked Questions
What is sodium metasilicate pentahydrate used for?
Sodium metasilicate pentahydrate (CAS 10213-79-3) is an alkaline soluble silicate used as an alkaline builder in powdered and liquid cleaners, as a foundry mold and core aid, as a processing aid in pulp and paper, and as a starting material for silicas and zeolites. The hydrated grade dissolves readily for both liquid and powder formulations. RawSource supplies it for industrial cleaning and processing.
What are the other names for sodium metasilicate pentahydrate?
It is also referred to as sodium silicate pentahydrate and disodium metasilicate pentahydrate, with the formula often written Na2SiO3·5H2O (H10Na2O8Si). The anhydrous and nonahydrate forms are related grades. Confirm the exact hydrate by CAS (10213-79-3) on the CoA.
What is the difference between the pentahydrate and anhydrous grades?
The pentahydrate carries five waters of crystallization and dissolves quickly in cool water, making it convenient for many cleaning formulations; the anhydrous grade has no bound water, giving higher silicate content and alkalinity per kilogram. Choose based on dissolution needs versus active concentration. Contact us to match the grade to your application.
What is the molecular weight and formula of sodium metasilicate pentahydrate?
Its formula is H10Na2O8Si (Na2SiO3·5H2O), with a molecular weight of approximately 212.1 g/mol. RawSource provides a CoA confirming identity and specifications for each lot.
How is sodium metasilicate pentahydrate supplied in bulk?
It is supplied as a powder or granular solid in bags, drums, and bulk quantities. The HS classification is 2839.11 (sodium metasilicates). Request a CoA and SDS, and contact us for available grades and a bulk quote.