Sodium Metasilicate Pentahydrate
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Sodium Metasilicate Pentahydrate is a white crystalline solid containing five molecules of water of crystallization. It is widely used for its alkaline and detergent properties, making it effective in cleaning, water treatment, and as a corrosion inhibitor. The pentahydrate form is commonly preferred in detergent and industrial applications where controlled moisture content is beneficial. It dissolves readily in water, forming strongly alkaline solutions useful in various industries.
Sodium Metasilicate Pentahydrate
Primary Uses
- Detergents & Cleaning Agents
- Functions as a builder and alkalinity source in laundry detergents, dishwashing powders, and industrial cleaners.
- Used in heavy-duty degreasing formulations for industrial and automotive cleaning.
- Water Treatment
- Acts to soften water and adjust pH in municipal and industrial water treatment processes.
- Metal Treatment & Corrosion Control
- Employed as a corrosion inhibitor and metal surface cleaner in plating and finishing operations.
- Ceramics and Cement Industry
- Serves as a binder and fluxing agent in ceramics, cement, and refractory products.
- Pulp & Paper Industry
- Used in pulping and paper bleaching to remove lignin and impurities, improving paper quality.
Secondary Uses
- Textile Industry
- Utilized in textile scouring and bleaching processes.
- Paints and Coatings
- Added to improve adhesion and durability of paints and coatings.
- Adhesives & Sealants
- Used as an additive to improve bonding strength and stability.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Sodium metasilicate pentahydrate
- Common/Trade Name: Sodium Metasilicate Pentahydrate
- CAS Number: 10213-79-3
- HS Code: 2839.39
- Synonyms: Sodium silicate pentahydrate, Water glass pentahydrate
2. Physical & Chemical Properties
- Physical State: Solid (crystalline powder)
- Color & Odor: White, odorless
- Solubility: Highly soluble in water, forming alkaline solutions
- pH (1% solution): ~12-13
- Density: Approx. 1.6 g/cm³
3. Safety & Hazard Attributes
- GHS Classification: Corrosive (causes severe skin burns and eye damage)
- Toxicity: Harmful if swallowed; causes severe irritation and burns
- Exposure Limits: Observe occupational exposure limits for alkaline dust and solutions
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area, protected from moisture and incompatible substances such as acids
- Container Type: Typically supplied in sealed moisture-resistant bags or drums
- Shelf Life: Stable for up to 2 years if stored properly
- Handling Precautions: Use protective gloves, goggles, and dust masks; avoid dust generation
5. Regulatory & Compliance Attributes
- Complies with major international industrial chemical regulations (e.g., REACH, TSCA, OSHA)
- Registered under global chemical inventories such as EINECS and DSL
- Adheres to workplace safety and handling standards for corrosive substances
- Meets environmental and health safety standards for water treatment and detergent applications
- Approved for use in regulated industrial processes including cleaning, water treatment, and ceramics manufacturing
- May be subject to labeling and documentation under GHS and CLP for transportation and handling
6. Environmental & Health Impact
- Biodegradability: Inorganic; not biodegradable but does not bioaccumulate
- Ecotoxicity: Can be harmful to aquatic life if released in large amounts
- Safety: Requires careful handling to prevent environmental contamination and human exposure
Safety Handling Precautions
- PPE Required: Protective gloves, safety goggles, face shield, and dust respirator
- Handling Guidelines: Avoid inhalation of dust; use in well-ventilated areas
- Storage Measures: Keep containers tightly sealed and stored in a dry environment away from acids
First Aid Measures
- Inhalation: Move to fresh air and seek medical attention if irritation develops
- Skin Contact: Rinse immediately with plenty of water; seek medical attention if burns occur
- Eye Contact: Flush eyes with water for at least 15 minutes; get urgent medical care
- Ingestion: Do not induce vomiting; rinse mouth and seek immediate medical help
Firefighting Measures
- Fire Hazards: Non-flammable but may release toxic fumes on decomposition
- Extinguishing Media: Use water spray, foam, dry chemical, or CO₂ for surrounding fires
- Special Precautions: Wear full protective equipment and breathing apparatus
- Hazardous Combustion Products: May emit silica fumes and sodium oxides
Related products
Borax Decahydrate
Borax Decahydrate, also known as sodium tetraborate decahydrate, is a naturally occurring mineral and an important inorganic compound. It appears as colorless or white crystalline granules or powder with a salty, alkaline taste. This compound is widely used in detergents, cosmetics, glass manufacturing, agriculture, and various industrial applications due to its excellent buffering, emulsifying, and antiseptic properties. The “decahydrate” indicates that each molecule of borax contains ten water molecules bound in its crystal structure, contributing to its crystalline appearance and physical properties.
Borax Pentahydrate
Borax Pentahydrate (sodium tetraborate pentahydrate) is an inorganic compound and a hydrated form of borax. It typically appears as colorless to white crystalline granules or powder. This compound contains five molecules of water of crystallization per formula unit, distinguishing it from other borax hydrates such as the decahydrate form. Borax Pentahydrate is widely used across industries including detergents, glass production, agriculture, and cosmetics, valued for its buffering capacity, emulsification, and antiseptic properties. It is soluble in water and exhibits alkaline properties in aqueous solution.
Hydrazine Food Grade
Hydrazine Food Grade is a high-purity form of hydrazine (N₂H₄), a highly reactive, colorless, and fuming liquid with a pungent ammonia-like odor. It is a powerful reducing agent and chemical intermediate widely used in industrial applications. The food-grade specification ensures purity and controlled impurity levels suitable for limited and specialized food industry uses, primarily as a processing aid or sterilizing agent. Hydrazine exhibits strong nucleophilic and reducing properties, enabling various chemical transformations and sterilization processes.
Liquid Chlorine
Liquid Chlorine is a pale yellow-green, highly reactive chemical primarily composed of chlorine dissolved in water or as liquefied chlorine gas under pressure. It is widely used as a powerful disinfectant, bleaching agent, and oxidizer in water treatment, sanitation, and various industrial applications. Due to its strong antimicrobial properties, liquid chlorine effectively controls bacteria, viruses, algae, and other microorganisms, ensuring safe potable water and hygienic conditions.
Sodium Alumina Silicate
Sodium Alumina Silicate is an inorganic compound consisting of sodium, aluminum, and silicon oxides. It is typically found as a white, amorphous powder with excellent adsorption and ion-exchange properties. Commonly used as a detergent builder, water softener, and desiccant, sodium alumina silicate improves cleaning efficiency, controls water hardness, and aids moisture absorption. Its thermal stability and chemical inertness make it valuable across detergent manufacturing, water treatment, and various industrial processes.
Sodium Disilicate
Sodium Disilicate, commonly supplied in granular or powder form, is an alkaline, water-soluble compound used widely in industrial applications. It functions primarily as a binder, adhesive, and corrosion inhibitor. Its high alkalinity and silicate content make it effective in detergents, water treatment, and cement manufacturing. Sodium Disilicate is valued for its ability to improve strength and durability of materials, as well as its effectiveness in cleaning and stabilizing processes.
Sodium Metabisulphite
Sodium Metabisulphite is a white crystalline powder widely used as an antioxidant, disinfectant, and preservative. It dissolves readily in water, releasing sulfur dioxide, which acts as a powerful antimicrobial and antioxidant agent. This chemical finds broad applications in food processing, water treatment, pharmaceuticals, and industrial manufacturing to prevent spoilage, control microbial growth, and protect equipment from corrosion.
Sodium Metasilicate Anhydrous
Sodium Metasilicate Anhydrous is a white crystalline solid known for its alkaline properties and high solubility in water. It is widely used in industrial cleaning, detergent formulations, water treatment, and as a corrosion inhibitor. The anhydrous form is preferred where moisture sensitivity is a concern. It acts as a strong alkaline builder, improving the effectiveness of detergents and degreasers. This product is also used in adhesives, cement, and ceramics due to its binding and strengthening properties.

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