Sodium Metasilicate Anhydrous

Compared with pentahydrate sodium metasilicate, this anhydrous grade features higher alkalinity, stronger emulsification for grease, lower hygroscopicity, and stable performance under high-temperature industrial conditions. It is widely used as a core raw material in heavy-duty alkaline cleaning systems and industrial processing applications.

Key Functional Properties

Strong degreasing and saponification ability for heavy industrial oil and rust removal

Stable performance in high-temperature environments (90°C–120°C)

Effective calcium and magnesium ion sequestration to prevent redeposition

High inorganic binding strength for refractory and ceramic applications

Core Advantages

Fully Dehydrated Production Process

Produced through a two-stage rotary kiln high-temperature calcination process, with residual moisture controlled below 0.3%. The material does not swell in aqueous systems, reducing the risk of pipeline blockage in industrial cleaning equipment.

Adjustable Alkalinity and Low Impurities

Raw materials are based on purified quartz sand with double sedimentation filtration. Total alkalinity can be customized within 48%–54%, while insoluble residue is controlled at ≤0.06%, ensuring clean performance after application.

Anti-Caking and Low Hygroscopic Design

An inorganic anti-caking coating is applied to maintain stable powder flowability. Under sealed storage conditions, the product remains free-flowing for up to 18 months, reducing risks during long-distance transport.

Integrated Silicate Production Chain

The entire production chain is internally controlled, including quartz mining, sodium silicate synthesis, and high-temperature calcination. This ensures stable quality and reduces dependency on external suppliers.

Technical Specifications

Standard Industrial Grade

Test Item	Standard Requirement	Premium Grade	Typical Result
Total Alkali (Na₂O)	≥ 48.0%	49.2%–53.5%	Qualified
SiO₂ Content	≥ 45.0%	46.1%–49.3%	Qualified
Modulus (SiO₂/Na₂O)	0.95–1.05	0.98–1.02	Stable
Free Alkali (NaOH)	≤ 1.80%	≤ 1.10%	Low
Insoluble Matter	≤ 0.20%	≤ 0.06%	Very Low
Moisture	≤ 0.50%	≤ 0.28%	Controlled
Whiteness	≥ 83	88–93	High

 

High-Purity Custom Grade

Designed for precision applications such as automotive parts cleaning and aerospace surface treatment.

Parameter	Specification
Heavy Metals (Pb, As, Cd)	≤ 5 ppm
Application	Precision metal cleaning, aerospace components
Compliance	EU and high-end industrial standards

Application Fields

Heavy Industrial Cleaning

Used in automotive parts degreasing, metal hardware cleaning, steel pipe descaling, and high-temperature circulation cleaning systems.

Refractory and Ceramic Industry

Acts as a high-temperature inorganic binder in refractory bricks, kiln castables, and ceramic bodies, improving structural strength and reducing cracking during firing.

Textile and Industrial Washing

Applied in cotton desizing, industrial garment washing, and heavy oil removal processes under high-temperature conditions.

Wastewater Treatment

Used for heavy metal chelation, acid neutralization, and textile wastewater purification processes.

Additional Applications

Oilfield additives, paper deinking processes, and glass surface cleaning systems.

Quality Control and Certifications

Each batch can be supplied with full international compliance documents, including ISO 9001, ISO 14001, SGS testing reports, REACH registration, and MSDS documentation. High-purity grades may also include RoHS compliance reports and third-party validation certificates.

Production is strictly controlled through raw material inspection, kiln temperature monitoring, particle screening, final batch sampling, and full traceability with retained samples.

Manufacturing Strength

The product is manufactured through an integrated system covering quartz mining, sodium silicate synthesis, and rotary kiln dehydration. This ensures stable raw material supply and consistent product quality.

With fully automated production lines and large-scale capacity, monthly output can reach up to 14,000 tons, supporting both standard and bulk industrial orders.

Technical support is available for application optimization in cleaning systems, refractory formulations, and industrial process adjustments.

Packaging and Logistics

Standard packaging includes 25kg moisture-proof woven bags with double PE inner liners. For bulk industrial use, 1000kg to 1250kg jumbo bags are available. Sample packaging options of 5kg or 10kg are provided for testing and distribution.

All packaging can be customized with branding, labeling, and printing requirements. Shipping options include full container ocean freight, LCL shipping, and air express for samples.

Delivery and Support

Standard products are shipped within 3–7 working days after payment confirmation. Customized high-purity orders require approximately 15–23 working days depending on specifications.

Technical support includes formulation guidance, online consultation, and application troubleshooting. Quality assurance is provided with COA reports and batch traceability documentation.

Frequently Asked Questions

What is the difference between anhydrous and pentahydrate sodium metasilicate? The anhydrous form contains no crystallization water, offering higher alkalinity, stronger cleaning performance, and better high-temperature stability.

Does it absorb moisture during transportation? The product uses anti-caking coating and moisture-proof packaging, maintaining stable flowability under normal storage conditions.

Can export documents be provided? Yes, including REACH, MSDS, ISO certificates, SGS reports, and COA documentation.

What is the minimum order quantity? Standard grade starts from 1 ton. Custom grades start from 20 tons. Samples are available without MOQ.

How should it be stored? Keep in a dry, sealed environment away from moisture and acidic substances.