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.

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Categories: Analytical Reagents, Bleaching Agents, Builders, CLEANING AND DETERGENT CHEMICALS, Corrosion Inhibitors, LABORATORY CHEMICALS, pH Adjusters, TEXTILE CHEMICALS, WATER TREATMENT CHEMICALS Tags: Hydrated Sodium Silicate, Industrial Cleaning, Inorganic Alkaline Salt, Na₂SiO₃·5H₂O, Sodium Metasilicate Pentahydrate, Water treatment

Description

Uses
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.

PRODUCT KEY FEATURES

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

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

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

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

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

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

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