In modern industry, caustic soda (NaOH – Sodium hydroxide) It plays an extremely important and almost irreplaceable role. Its diverse applications make this strong alkaline compound one of the most produced and consumed chemicals globally, exceeding expectations. 70 million tons per year.
1/ What is sodium hydroxide (NaOH)? Key characteristics and properties.
Caustic soda, its full chemical name is Sodium hydroxide (Sodium hydroxide – NaOH), is an inorganic compound with very strong alkaline properties. Terminology "caustic soda" This stems from its extremely corrosive properties: this compound is capable of breaking down proteins and lipids even at room temperature.
1.1/ Physical properties
In its pure solid state, sodium hydroxide is white, odorless, and extremely strong moisture absorptionWhen exposed to air for a long time, this substance absorbs CO₂ to form Na₂CO₃ on its surface, reducing its purity. Therefore, this chemical... It must be stored in an airtight container..
1.2/ Chemical properties
Sodium hydroxide is a typical strong base with a pH of approximately 1% solution. 14This is one of the most widely studied and applied inorganic bases in industrial chemistry.
2/ Industrial process for producing caustic soda (NaOH)
The majority of the world's output is produced through processes. Electrolysis of saturated salt solution (NaCl) — called a process Chlor-alkaliThis process simultaneously produces chlorine gas (Cl₂) and hydrogen gas (H₂).
| Technology | Market share | Outstanding characteristics | Disadvantages |
|---|---|---|---|
| Ion exchange membrane | ~50% of the global | Energy efficient, high purity, environmentally friendly. | High initial investment cost |
| Barrier | Up to 35% | Lower cost | The resulting solution has a low concentration (10–12%) and requires further evaporation. |
| Mercury cell | Decrease | Creating a very pure product. | The risk of mercury poisoning is being eliminated in many countries. |
3. Common types of NaOH (Sodium Bicarbonate) available on the market.
🔶 Caustic Soda Flakes
Thin, flat, white flakes. Purity meets standards. 98-99%Easy to measure, low dust, convenient for transportation and long-term storage.
🔵 Caustic Soda Pearls/Beads
Small, spherical pellets, uniform in size, purity ~99%Excellent free flow properties, suitable for automatic metering systems in large factories.
💧 Liquid Caustic Soda
Clear solution, common concentration: 20%, 32%, and 50%Approximately . 60% of the global market share Thanks to its convenience — it can be pumped directly into the process without needing to be dissolved.
4. Multidisciplinary applications of caustic soda (NaOH)
Thanks to its strong alkalinity, sodium hydroxide is an essential link in countless key industrial manufacturing processes.
Paper and pulp industry This industry consumes the largest volume of this chemical. In the Kraft pulping process, sodium hydroxide solution is used to break down lignin—the glue that binds wood together—separating the pure cellulose fibers for paper production. Additionally, it is involved in the pulp bleaching and deinking stages during the recycling process.
Soap and detergent manufacturing It is one of the oldest applications. This chemical reacts directly with animal and vegetable fats and oils through the saponification process, producing soap and glycerin.
Wastewater treatment This field is highly regarded for its efficiency and economic viability. Sodium hydroxide is used to neutralize highly acidic wastewater streams from factories, while also creating an alkaline environment that helps precipitate heavy metal ions for filtration and removal from water sources. Vietnamese standards for industrial wastewater treatment are stipulated in...
QCVN 40:2011/BTNMT of the Ministry of Natural Resources and Environment.
Textile and dyeing industry This chemical is used in the initial processing stages to clean and remove natural waxes and oils adhering to the cotton fibers. In particular, during the mercerization process, soaking the cotton fibers in a high-concentration alkaline solution alters the fiber structure, thereby increasing durability, luster, and dye absorption.
Aluminum production The Bayer process consumes large amounts of sodium hydroxide. This is used to dissolve aluminum oxide from raw bauxite ore—a crucial chemical refining step before electrolysis to produce pure metallic aluminum.
Food Processing Food-grade sodium hydroxide is also used in strictly controlled proportions for purposes such as chemically peeling fruits and vegetables, treating cocoa beans to reduce acidity, and softening the texture of certain specific foods.
Oil and gas processing This alkaline substance is used to remove residual acidic impurities in crude oil, treat harmful sulfur compounds, and control pH in many complex stages of the petrochemical refining process.
International Labour Organization (ILO) Regarding the management of industrial chemicals in the workplace.
5. Benefits of buying Sodium Hydroxide from Loc Thien Chemicals
- Guaranteed quality: Products meet international standards with full MSDS documents, ZDHC, ISO 9001 certificates.
- Competitive price: As a direct distributor, we are committed to providing reasonable prices and stable supply.
- Dedicated technical support: A team of experts is ready to advise on all technical issues, helping to optimize your chemical usage process.
- Fast shipping: Modern warehouse system in major cities such as Ho Chi Minh City, Binh Duong, Dong Nai, Da Nang ensures the fastest delivery time.
- Safety and environmental protection: We provide safe storage and transportation solutions, ensuring minimal health and environmental risks.
6/ Contact us to place an order
- 📞 Hotline: (+84)979 891929
- (I.e. Email: locthien@locthien.vn
- 🌐 Website: hoachatcoban.net
Loc Thien Chemicals – Committed to quality, reputation, accompanying your business!
7. Safety measures and first aid when using Sodium Hydroxide (NaOH).
Sigma-Aldrich SDS – Sodium Hydroxide.
🦺 Personal protective equipment (PPE) is mandatory.
😷 Full face mask
🧤 Nitrile/neoprene/PVC gloves
🥼 Chemical-resistant clothing
👢 Rubber boots
🚑 Emergency First Aid Procedure
8. Conclusion
Sodium hydroxide (NaOH) plays a pivotal role as an industrial chemical, contributing to the production of a wide range of essential products in daily life. Having sufficient knowledge, selecting the right form, and strictly adhering to safety regulations not only helps businesses optimize production efficiency but also comprehensively protects the health and lives of workers.
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