Caustic Soda price in Bangladesh
৳ 71.00
Caustic Soda is a highly alkaline and corrosive chemical widely used in soap, textile, paper, and chemical industries. It is commonly available in flakes or solid form and is essential for pH control, cleaning, and industrial manufacturing processes.
Caustic Soda (Sodium Hydroxide) – Complete Industrial Description
Chemical Formula: NaOH
Appearance: White flakes, pellets, or solid form
Caustic Soda, chemically known as Sodium Hydroxide (NaOH), is a highly versatile and strongly alkaline inorganic chemical widely used in various industrial processes around the world. It is one of the most important basic chemicals in the manufacturing sector and plays a vital role in soap production, textile processing, paper manufacturing, water treatment, petroleum refining, and chemical industries.
Caustic soda is typically produced through the electrolysis of sodium chloride (salt) solution in a process known as the chlor-alkali process. The resulting product is highly pure and available in different forms such as flakes, pearls, pellets, and liquid solutions. Due to its powerful alkaline properties, caustic soda is capable of dissolving grease, oils, fats, and organic materials efficiently.
It is a hygroscopic substance, meaning it readily absorbs moisture and carbon dioxide from the atmosphere. When dissolved in water, it releases a significant amount of heat, forming a highly alkaline solution suitable for numerous industrial applications.
Chemical Composition and Structure
Caustic soda is composed of sodium (Na), oxygen (O), and hydrogen (H) atoms arranged in a simple ionic structure.
Chemical Formula:
NaOH
It is highly soluble in water and alcohol but insoluble in ether and non-polar solvents. The strong alkaline nature of sodium hydroxide makes it extremely reactive with acids and various organic compounds.
Key Properties
Caustic Soda offers several important industrial properties:
- Strong alkaline and corrosive nature
- Highly soluble in water
- Hygroscopic (absorbs moisture from air)
- Generates heat when dissolved in water
- Excellent grease and oil dissolving capability
- Chemically stable under normal conditions
- Highly reactive with acids and organic materials
These properties make it suitable for a wide range of industrial and commercial applications.
Manufacturing Process
Caustic soda is primarily produced by the chlor-alkali process, where brine (saltwater) undergoes electrolysis.
Main Products of the Process:
- Sodium Hydroxide (NaOH)
- Chlorine Gas (Cl₂)
- Hydrogen Gas (H₂)
The produced sodium hydroxide solution is then concentrated and converted into flakes, pellets, or other commercial forms.
Major Industrial Applications
Soap and Detergent Industry
Caustic soda is a key raw material in soap manufacturing through the saponification process, where fats and oils react with alkali to produce soap.
Textile Industry
Used in fabric processing, dyeing, bleaching, and mercerizing cotton to improve strength and dye absorption.
Paper and Pulp Industry
Essential for pulping wood and removing lignin during paper production.
Water Treatment
Used to adjust pH levels and neutralize acidic water in industrial and municipal treatment systems.
Chemical Manufacturing
Acts as a basic raw material in the production of various chemicals, solvents, and intermediates.
Petroleum and Refining Industry
Used for removing impurities and acidic compounds from petroleum products.
Food Industry (Food Grade Applications)
Used in controlled applications such as food processing, cleaning, and pH adjustment.
Advantages
- Highly effective alkaline chemical
- Multi-purpose industrial application
- Strong cleaning and dissolving capability
- Improves manufacturing efficiency
- Cost-effective and widely available
- Essential raw material for many industries
Technical Parameters (Typical)
- Purity: 98%–99%
- pH Value: Strongly alkaline
- Melting Point: ~318°C
- Solubility: Highly soluble in water
- Appearance: White flakes / pellets
Handling and Usage Guidelines
Because caustic soda is highly corrosive, proper handling procedures are essential:
- Use protective gloves, goggles, and safety clothing
- Avoid direct contact with skin and eyes
- Always add caustic soda slowly into water, not water into caustic soda
- Ensure proper ventilation during handling
Improper handling may cause severe burns and irritation.
Packaging and Storage
Caustic soda is generally supplied in:
- 25 kg bags
- Jumbo bags
- Drums (liquid form)
Store in a dry, cool, and well-ventilated area away from moisture, acids, and incompatible materials. Since it absorbs moisture rapidly, containers should remain tightly sealed.
Safety and Precautions
Caustic soda is highly corrosive and should be handled carefully. In case of contact:
- Wash affected skin immediately with plenty of water
- Rinse eyes thoroughly and seek medical attention
- Avoid inhalation of dust or vapors
Follow standard industrial safety procedures and local regulations during storage and use.
Conclusion
Caustic Soda (Sodium Hydroxide – NaOH) is one of the most important industrial chemicals used worldwide. Its strong alkaline properties, high reactivity, and excellent cleaning capability make it essential in soap manufacturing, textiles, paper, water treatment, petroleum refining, and chemical processing industries. With versatile applications, reliable performance, and cost-effectiveness, caustic soda remains a fundamental raw material in modern industrial production and manufacturing operations.
