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Sodium Metasilicate Anhydrous

  • Sodium Metasilicate Anhydrous

Sodium Metasilicate Anhydrous

Sodium Metasilicate Anhydrous is a white, free-flowing granular or powdered inorganic compound produced by fusing high-purity silica sand and soda ash at temperatures above 1,100 °C. Unlike the pentahydrate form, the anhydrous version contains virtually no water of crystallization (<0.5% typical), offering superior stability, higher active alkalinity, and significantly better shelf life in humid environments.
CAS No.: 6834-92-0
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Specification

Sodium Metasilicate Anhydrous is a white, free-flowing granular or powdered inorganic compound produced by fusing high-purity silica sand and soda ash at temperatures above 1,100 °C. Unlike the pentahydrate form, the anhydrous version contains virtually no water of crystallization (<0.5% typical), offering superior stability, higher active alkalinity, and significantly better shelf life in humid environments.


ITEM

SODIUM METASILICATE ANHYDRO

GRANULAR

SODIUM METASILICATE ANHYDROUS

POWDER

SUPERIOR GRADENORMAL GRADE-
Na2O %51.00±1.0051.00±1.0050.00±1.00
SiO2 % ≥45.00

45.00

45.50±1.00
Fe % ≤0.0150.020.015
Bulk Density g/cm30.95-1.350.95-1.350.95-1.35
Particle Size %18-60mesh ≥93.0018-60mesh ≥93.00-
Whiteness ≥858090
Water Insoluble %0.150.2-
Transparence ≥80--

Package

Storage of Sodium Metasilicate Anhydrous

Protect from sun-scorched and rain-drenched. Send out the product in the sequence of stored-up date.


Package of Sodium Metasilicate Anhydrous

25kgs plastic weaves bag, 20MT/FCL with pallets.


Sodium Metasilicate Anhydrous


Sodium Metasilicate Anhydrous


Application

Applications of Sodium Metasilicate Anhydrous

Industrial & Institutional Cleaning: Primary alkaline builder in heavy-duty detergents, ware-wash compounds, metal cleaners, and floor cleaners.

Textile Processing: Peroxide bleach stabilizer and detergent booster.

Ceramics & Cement: Deflocculant and binder in ceramic slips and refractory cements.

Water Treatment: Corrosion inhibitor for potable and industrial water systems.

Oilfield & Drilling: Component of high-pH drilling fluids.

Pulp & Paper: Peroxide stabilizer in de-inking and bleaching processes.

Adhesives & Sealants: High-temperature binder for cardboard and foundry cores.


FAQ

Q: What is the difference between sodium metasilicate anhydrous and pentahydrate?

A: Anhydrous contains <0.5% moisture and ≈51% Na₂O, while pentahydrate (Na₂SiO₃·5H₂O) contains ~42% water of crystallization and only ≈29% Na₂O. Anhydrous is preferred when maximum alkalinity, stability, or cost-per-active-kilo is required.


Q: Is Sodium Metasilicate Anhydrous the same as "water glass" in solid form?

A: Yes. "Water glass" usually refers to liquid sodium silicate solutions, but the anhydrous granular form is the solid equivalent with a 1:1 Na₂O:SiO₂ ratio.


Q: Can it be used in automatic ware-wash dispensers?

A: Yes, the granular anhydrous form dissolves rapidly and is widely used in solid dishwasher detergents and institutional ware-wash compounds.


Q: Is it safe for aluminum and soft metals?

A: No. Sodium metasilicate is highly alkaline (pH >12.5) and will etch or corrode aluminum, zinc, and tin at typical use concentrations. Use sodium silicate with higher SiO₂ ratios (2.0–3.2) or add silicate inhibitors for aluminum-safe formulations.


Q: Is it biodegradable or environmentally friendly?

A: Sodium metasilicate is inorganic and does not biodegrade, but it is readily neutralized in wastewater treatment and does not persist in the environment. It is phosphate-free and helps reduce eutrophication compared to STPP.


Q: Where can I buy high-quality Sodium Metasilicate Anhydrous?

A: You can contact us via Email mandy@czqidi.com or WhatsApp +86-18452425579 for offers and bulk orders.

Storage

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