Technical Application Guide of Anhydrous Sodium Metasilicate in Detergent and Cleaning Formulations

Introduction: The Role of Anhydrous Sodium Metasilicate in Modern Cleaning Systems

Anhydrous Sodium Metasilicate (Na₂SiO₃) is a high-performance alkaline builder widely used in detergent, cleaning and industrial treatment formulations.

With excellent alkalinity, buffering capacity, water softening ability and anti-redeposition performance, Anhydrous Sodium Metasilicate has become an important functional ingredient in various cleaning products, including:

• Laundry powder
• Concentrated liquid detergent
• Dishwashing detergent
• Industrial degreasers
• Metal cleaning agents
• Solid cleaning products

Compared with hydrated sodium silicate products, Anhydrous Sodium Metasilicate provides higher active content, better storage stability and more flexible formulation performance. It is especially suitable for concentrated detergent systems and industrial cleaning applications requiring strong alkalinity and stable performance.

Shandong Zhongzhi Chemical Technology Co., Ltd. provides different grades of Anhydrous Sodium Metasilicate, including granular and powder grades, designed to meet different application requirements in the detergent and cleaning industries.

1. Why Use Anhydrous Sodium Metasilicate in Detergent Formulations?

1.1 Alkalinity Builder

Anhydrous Sodium Metasilicate provides stable alkalinity in cleaning formulations.

The alkaline environment helps:

• Improve grease removal efficiency
• Enhance surfactant cleaning performance
• Promote removal of protein and oily stains
• Maintain stable cleaning performance during use

It is widely used as an alkaline builder in heavy-duty detergent powders and industrial cleaners.

1.2 Water Softening Performance

Hard water ions such as calcium and magnesium can reduce surfactant efficiency.

Anhydrous Sodium Metasilicate helps control the influence of hardness ions, improving:

• Surfactant utilization
• Washing efficiency
• Detergent stability

It is often combined with builders such as zeolite, sodium carbonate and citrate systems.

1.3 Anti-Redeposition Performance

During washing, removed dirt particles may redeposit onto fabric surfaces.

Anhydrous Sodium Metasilicate improves the dispersion stability of soil particles and works together with polymers such as:

• Sodium polyacrylate
• CMC (Carboxymethyl Cellulose)

to improve fabric cleanliness.

1.4 Metal Protection Ability

In alkaline cleaning systems, certain metals may suffer from corrosion.

Anhydrous Sodium Metasilicate can provide protective effects through silicate film formation, helping reduce corrosion risks on:

• Steel surfaces
• Aluminum components
• Equipment parts

It is commonly used in industrial cleaning and metal treatment formulations.

2. Product Grade Selection Guide

Shandong Zhongzhi Chemical Technology Co., Ltd. supplies different grades of Anhydrous Sodium Metasilicate according to application requirements.

3. Recommended Application Dosage

The dosage of Anhydrous Sodium Metasilicate depends on the cleaning system, raw materials and performance requirements.

Typical dosage ranges:

The final formulation should be optimized according to:

• Target cleaning performance
• Raw material compatibility
• Production equipment
• Water hardness conditions
• Cost requirements

4. Technical Considerations When Using Anhydrous Sodium Metasilicate

Dissolution

Anhydrous Sodium Metasilicate dissolves with heat release. During production:

• Add gradually
• Maintain sufficient mixing
• Control processing temperature below 60℃

pH Control

A 1% aqueous solution of Anhydrous Sodium Metasilicate normally shows strong alkalinity.

Recommended precautions:

• Use protective gloves
• Avoid direct contact with skin and eyes
• Adjust formulation pH according to end-use requirements

Compatibility

Anhydrous Sodium Metasilicate has good compatibility with:

• Anionic surfactants (AES, LAS)
• Nonionic surfactants (AEO series)
• Builders
• Dispersants

Avoid direct mixing with acidic ingredients.

5. Typical Formulation Examples

The following formulations are typical technical references developed for detergent and cleaning applications.

They demonstrate the application performance of different grades of Shandong Zhongzhi Anhydrous Sodium Metasilicate.

The formulations include:

• 1. Concentrated Liquid Laundry Detergent
• 2. Heavy Duty Laundry Powder
• 3. Concentrated Dishwashing Liquid
• 4. Industrial Heavy Oil Cleaner
• 5. Metal Cleaning and Rust Protection Solution
• 6. Solid Cleaning Block Formulation

Note: Actual production parameters should be adjusted according to raw materials, equipment conditions and required product performance.

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