Composition and Chemical Properties
With small amounts of impurities like sodium carbonate and chloride, high-quality caustic soda includes 96–98% NaOH. It is made by the electrochemical chlor-alkali process, which uses water and salt (NaCl).
Why Industries Depend on It
Caustic Soda is in demand for its capacity to neutralize, dissolve, and react:
- Has strong alkaline cleaning and degreasing properties
- Neutralizes acidic waste and by-products
- Used as a main ingredient in making soap and detergents
- Helps in modifying formulations through pH control
- Used for alumina extraction, textiles, and water purification
Major Industrial Applications
1. Construction Industry
- Used for cleaning, neutralization, and preparation of construction surfaces.
- Removes grease, oil, and stains from concrete or tiles.
- Assists in surface preparation before coating or finishing.
- Used in the production of adhesives, resins, and waterproof coatings.
2. Detergent and Cleaning Industry
- Has a major role in the production of soap, detergents, and degreasers.
- Assists in the conversion of fats and oils to soap.
- Used in drain cleaners and heavy-duty degreasers.
- Assists in the breakdown of organic matter and tough dirt.
3. Food Industry
- Applied in food-grade conditions for cleaning and peeling.
- Assists in the cleaning and sterilization of processing equipment.
- Used in the chemical peeling of fruits and vegetables.
- Assists in washing bottles and surfaces in beverage plants.
4. Textile Industry
- A must-have for fiber treatment and pulp processing.
- Used as a mercerizing agent to increase cotton strength and shine.
- Assists in removing impurities from textiles before dyeing.
- Used in pulp processing and paper bleaching/recycling.
5. Pharmaceutical Industry
- Applied in controlled quantities for formulation and sanitation.
- Assists in pH control in creams and solutions.
- Cleans and sterilizes manufacturing equipment.
- Involved in the preparation of certain cosmetic and pharma intermediates.
6. Other Industrial Uses
- Serves as a strong base in various chemical and refining operations.
- Involved in alumina recovery and biodiesel manufacturing.
- Functions as a pH regulator in water treatment.
- Has applications in lab and chemical synthesis.
Identifying Quality Caustic Soda
When you are purchasing Caustic Soda for industrial or manufacturing use. Here are the important factors to be checked for quality Caustic Soda:
- Purity (NaOH %) – 98 to 99% for flakes and pellets
- Carbonate Content – minimal (≤ 0.5%)
- Moisture Level – should be ≤ 0.5%
- Iron and Impurities – as low as possible
- PH Level – 13 to 14 for 1% solution
- Color – bright white color with no yellowish tint and no lumps
Always ask for the Certificate of Analysis (COA) and MSDS (Material Safety Data Sheet) from the supplier.
Leading Manufacturers of Caustic Soda
- Elchemy, Olin Corporation (USA)
- Dow Chemical (USA)
- Occidental Chemical/OxyChem (USA)
- Xinjiang Zhongtai Chemical (China)
- Westlake Corporation (USA)
- Formosa Plastics (Taiwan)
- BASF (Germany)
- Solvay (Belgium)
Where to Buy Caustic Soda in Pakistan?
If you want to purchase Caustic Soda in Pakistan, it is readily available in the market. Some places to buy it in different cities in Pakistan include:
- Lahore _ Shah Alam Market chemical shops.
- Karachi – Jodia Bazaar chemical dealers.
- Faisalabad _ Textile area industrial clients.
- Other large cities (Multan, Sialkot, Gujranwala, Rawalpindi, Islamabad, Peshawar, Quetta).
Caustic Soda is available in 25 kg HDPE packing or jumbo packing for bulk orders.
Price Overview (Pakistan – 2026)
Prices can differ depending on purity levels, grade, and import sources.
- China Bulk Export (2026) – $300-$450/ton
- Pakistan Local Market – PKR 150-220/kg
Tianjin Unilion can handle each step of the process for clients who need assistance importing Caustic Soda and other industrial chemicals, from sourcing and procurement to logistics, customs clearance, and timely delivery.
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