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Sodium Metasilicate

CAS Number

10213 79 3 for pentahydrate and 13517 24 3 for nonahydrate.

Molecular Formula

Na2SiO3 5H2O and Na2SiO3 9H2O.

Molecular Weight

212.14 for pentahydrate and 284.20 for nonahydrate

Pack Size

50 kg bag packing

HSN Code

28391100

MSDS

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Sodium Metasilicate in 5H2O and 9H2O options for formulators who need dependable alkalinity, consistent solids quality, and predictable mixing behavior batch after batch. Delivered with quotation ready documentation support, clear traceability, and supply planning that fits regular production cycles and inventory targets. Safer sourcing focus includes controlled packing and practical handling guidance from Chemical Suppliers in India.

About Sodium Metasilicate

Sodium Metasilicate is an alkaline silicate salt used to build alkalinity and support cleaning, dispersion, and stability in formulated systems. Hydrate form matters because it changes active content per kilogram and can affect dissolution and dosing accuracy on plant lines. Buyers typically evaluate hydrate type, assay basis, insolubles, moisture behavior, and solution performance. During quotation, specification limits, COA format, SDS, and application fit notes can be shared for procurement acceptance.

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Product Specifications

Parameter	Sodium Metasilicate 5H2O	Sodium Metasilicate 9H2O
Common name	Pentahydrate	Nonahydrate
CAS number	10213 79 3	13517 24 3
Molecular formula	Na2SiO3 5H2O	Na2SiO3 9H2O
Molecular weight	212.14	284.20
What changes in practice	Higher active per kg and often lower water carry in dosing	Lower active per kg and higher water of crystallization
Typical buyer checks	Appearance, insolubles, assay by titration, moisture or loss on drying	Appearance, insolubles, assay by titration, moisture or loss on drying
What we can share	COA format, test methods, and acceptance limits available on request	COA format, test methods, and acceptance limits available on request

Parameter

Available Packaging

♦50 kg bag packing

Applications

Home Care

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Sodium Metasilicate is used as an alkalinity builder in detergents and industrial cleaners to improve soil removal and support emulsification and dispersion. It helps formulators reach target pH reliably while keeping powders process friendly for blending and consistent batch making.

Paint, Ink & Coatings

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In coatings and related systems, sodium metasilicate is used where controlled alkalinity and silicate chemistry support dispersion stability and process consistency. Hydrate selection is often chosen around dosing accuracy, mixing behavior, and how fast the silicate dissolves during make up.

Safety & Handling

♦Avoid dust generation during bag handling and charging.
♦Use goggles, gloves, and suitable respiratory protection where airborne dust can occur.
♦Store sealed in a cool dry area to limit caking and moisture pickup.
♦Keep away from acids and avoid unintended contact with moisture sensitive areas in storage. SDS classifications commonly include metal corrosion risk, skin burns, serious eye damage, and respiratory irritation from dust exposure.

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FAQ's

Frequently Asked Questions

Common Questions About Reaching Us

Choose based on active metasilicate delivered per kilogram, not just the hydrate name. If you share your target solution strength or finished pH window, the equivalent dosing basis can be aligned and priced correctly. Get a Quote.

Price is driven by hydrate form, supply basis, bag liner requirement, pallet build, dispatch frequency, and the documentation pack your customer or audit requires. Send your monthly offtake and required documents to Get a Quote, subject to availability.

Teams typically verify assay as metasilicate, insoluble matter, moisture or loss on drying, and solution appearance at a defined make up strength. Test methods and acceptance criteria are available on request.

Differences usually come from hydrate form, moisture pickup, and the way the material dissolves during make up. Controlling water temperature, mixing energy, and dosing on an active basis reduces pH drift in production.

Add slowly into well agitated water and avoid high local concentration zones. Hard water, poor agitation, and dumping powder into a stagnant tank are common causes of haze or gel like behavior in silicate solutions.

Sodium metasilicate solutions are strongly alkaline and can be aggressive to some metals, coatings, and elastomers. Review tank and pump materials, gasket selection, and drainability. If bulk delivery is planned, confirm sealed vents, dry unloading practice, and a wash down plan before commissioning.

Most buyers ask for COA, SDS, hydrate identification, traceability, and a clear basis of supply statement. SGS & Company is a chemical supply distribution company based in Vadodara, and the document set can be shared during quotation as applicable.