NaOH 48%, also known as Sodium Hydroxide 48%, is one of the most important and versatile basic chemicals in industry. With strong alkaline properties, high chemical interaction and optimal concentration, 48% caustic soda is widely used, effectively meeting the needs of many manufacturing industries.

Characteristics of NaOH 48%
Outstanding physical and chemical properties
- Physical state: Colorless, slightly viscous liquid solution.
- Specific weight: 2,13 g/cm³ at 20°C, which increases efficiency compared to other chemicals of the same volume.
- Melting temperature: Approximately 318°C (604°F).
- Solubility: Completely soluble in water, forming a strong alkaline solution and releasing heat during dissolution.
- Corrosive properties: 48% NaOH is a strong corrosive substance that easily affects metals and plastics.
- Conductivity: Caustic soda solution is a good electrolyte due to the combination of OH⁻ and Na⁺ ions, suitable for industrial applications requiring electrical conductivity.
Notes when using NaOH 48%
Personal safety
- Labor protection: When working with 48% NaOH, it is necessary to wear full protective clothing, rubber gloves, goggles and hat.
- Ventilation: Work in an environment with exhaust fans or ventilation to avoid exposure to chemical vapors.
Storage and preservation
- Store in an alkaline-resistant container: NaOH 48% should be stored in an alkali-resistant plastic bottle or composite tank, tightly closed and kept in a cool place.
- Avoid incompatible substances: Do not store near oxidizers, acids or flammable substances.
Safe use
- When mixing, always add caustic soda to water (do not do the opposite) to avoid strong heat radiation causing danger.
- Avoid breathing NaOH dust or vapor, and do not let the chemical come into direct contact with skin or eyes.
Remove
- Dispose of NaOH according to environmental agency guidelines to avoid harm to health and the environment.

Applications of 48% NaOH in industry
Water treatment
NaOH 48% is the top choice in the water treatment industry for:
- Increases alkalinity (pH), helps neutralize acid.
- Removes dirt, heavy metals and bacteria in wastewater.
- Support water recycling process, ensure water quality meets standards.
Paper production
In the paper industry, 48% NaOH is used to:
- Wood fiber separation: Removes lignin, which improves paper whiteness and strength.
- Pulp treatment: Improve the quality of final products, save production costs.
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Chemical processing
NaOH 48% plays an important role in the production of chemicals such as:
- Soap, detergent and industrial salt.
- Sodium Silicate, Al(OH)₃ and PAC flocculants.
Petroleum industry
- Crude oil processing: Removes impurities and neutralizes fatty acids in crude oil.
- Improve the quality of petroleum products: Increase petrochemical refining efficiency, ensure quality standards.
Plastics and polymer industry
- pH adjustment in polymer production.
- Increases chemical stability and durability of plastic products.
Food industry
- NaOH 48% is used to clean equipment, surfaces and food production line systems.
- Purify cooking oil and ingredients, ensure food hygiene and safety.
Chemical industry
- It is an important ingredient in many complex chemical production and extraction processes, contributing to the creation of high quality products.

The difference of NaOH 48%
Compared with NaOH 32% and NaOH 50%
- 48% NaOH balance between efficiency and control.
- Higher concentration than 32% NaOH, which increases production efficiency without requiring special equipment as when using 50% NaOH.
Compared with caustic soda flakes and caustic soda granules
- Liquid form: Easy to use immediately without pre-dissolving.
- Process optimization: Suitable for automation systems and saves time and operating costs.
Why should you choose Loc Thien Investment and Development Company Limited?
Source of quality 48% NaOH for sale at Loc Thien
Loc Thien Chemicals is a reputable distributor of NaOH products, including:
- 48% liquid NaOH.
- NaOH 32%, 50%, caustic soda flakes and caustic soda granules.
Loc Thien Development Investment Company Limited is proud to be the leading unit in the field of supplying and manufacturing industrial chemicals in Vietnam. With many years of experience, we are committed to providing high quality products, professional services, and dedicated support, meeting all customer needs from production to environmental treatment.
You may be interested in the price sell caustic soda or Where to buy NaOH Please contact Loc Thien by phone number Phone: (+84)979 891929 for advice
The best quality
- Products meet international standards, accompanied by Material Safety Data Sheet (MSDS) details, providing full information on ingredients, properties and safe use.
- All products are thoroughly tested before being released to the market, ensuring compliance with the technical requirements of each industry.
Flexible production and dispensing services
- Various contents: We supply NaOH products with concentrations ranging from 32%, 48% to 50%, meeting the specific needs of customers in different industries.
- Customizable: Loc Thien is capable of producing and mixing chemicals according to customers' specific requirements, optimizing efficiency and costs during use.
Dedicated support
- Our team of experienced experts is always ready to advise and accompany customers from choosing the right product to providing instructions on safe use and storage.
- Committed to 24/7 technical support, ensuring all problems are resolved quickly and effectively.
Stable source of goods and modern warehouse system
- Large supply: Loc Thien always maintains abundant inventory, meeting even large orders in a short time.
- National warehouse system: With warehouses at Ho Chi Minh City, Da Nang, Can Tho, Binh Duong, Dong Nai, we guarantee fast, on-time delivery and cost-effective shipping.
Transparent customer support policy
- Flexible returns: Clear return policy within 7 days If the product does not meet technical requirements.
- Competitive price: Loc Thien commits to providing the most reasonable price, helping businesses optimize production costs while still ensuring quality.

Accompanying the sustainable development of your business
Let Loc Thien be your trusted partner, accompanying your business, bringing outstanding and sustainable values in production and business! We not only supply chemicals but also provide comprehensive solutions, helping businesses develop sustainably with high efficiency, low cost and absolute safety.
- 📞 Hotline: Phone: (+84)979 891929
- (I.e. Email: locthien@locthien.vn
- 🌐 Website: hoachatcoban.net
Contact now with Loc Thien to receive advice and the best quote for the product 48% NaOHWe are committed to providing high quality, safe products and professional services to meet all business needs!
FAQ – Frequently asked questions about NaOH 48%
- Can 48% Sodium Hydroxide be used as a substitute for 50% NaOH or 32% NaOH?
- 48% NaOH can replace 50% NaOH or 32% NaOH, but the concentration needs to be adjusted according to each specific application:
- 32% NaOH has a milder alkaline nature, suitable for water treatment and the textile dyeing industry.
- 48% NaOH Balance between efficiency and safety, commonly used in paper, petroleum and chemical industry.
- 50% NaOH higher concentrations, used in heavy industry, chemical production and oil refining.
- If replacement is required, businesses need to review and adjust production processes to achieve optimal efficiency.
- 48% NaOH can replace 50% NaOH or 32% NaOH, but the concentration needs to be adjusted according to each specific application:
- Is 48% NaOH compatible with what storage materials and piping systems?
- NaOH 48% is a strong corrosive substance, so it must be stored and transported with suitable materials:
- Fit: Plastic HDPE, PP, PVC, stainless steel (SS316).
- Not suitable: Aluminum, zinc, copper and their alloys as NaOH can cause rapid corrosion.
- Tanks and pipes: Should be plastic coated or have an alkali resistant coating for increased durability.
- Using the correct materials helps reduce the risk of failure and prolongs equipment life.
- NaOH 48% is a strong corrosive substance, so it must be stored and transported with suitable materials:
- When exposed to Sodium Hydroxide 48%, what should be done if it is splashed on the skin or eyes?
- 48% NaOH is a strong corrosive chemical. If it splashes on skin or eyes, it must be treated immediately according to the following steps:
- If on skin:
- Rinse immediately with clean water for at least min.
- Do not rub the affected skin area.
- If irritation occurs, seek medical help.
- If in eyes:
- Rinse eyes with clean water continuously for at least 15 minutes, keep eyes open when rinsing.
- Do not use eye drops or neutralizing chemicals.
- Go to a medical facility immediately for timely examination and treatment.
- If on skin:
- Always use gloves, goggles and protective clothing when working with 48% NaOH.
- 48% NaOH is a strong corrosive chemical. If it splashes on skin or eyes, it must be treated immediately according to the following steps:
- Does Sodium Hydroxide 48% have long term health effects?
- 48% NaOH can cause serious effects if exposed for a long time without protection:
- Respiratory system: Inhalation of NaOH vapor can cause respiratory irritation and chemical pneumonia if exposed at high concentrations.
- Skin and eyes: Prolonged exposure can cause chemical burns, skin irritation and loss of vision if not treated promptly.
- Digestive: Ingestion of NaOH can cause mucosal burns, risk of gastric perforation and esophageal damage.
- Need to ensure safety procedures, use protective equipment, and work in the environment ventilation to minimize risk.
- 48% NaOH can cause serious effects if exposed for a long time without protection:
- Is Sodium Hydroxide 48% environmentally friendly?
- 48% NaOH can negatively affect the environment if not handled properly:
- Water source: Can alter pH, pollute water and affect aquatic life.
- Land: When leached into soil, NaOH can change soil structure and reduce fertility.
- Air: If evaporated, NaOH can form alkaline vapors, causing eye and respiratory irritation.
- Solution:
- Chemical neutralization before discharge with weak acid solution (acetic acid, CO₂).
- Use wastewater treatment system meet the standards.
- Proper storage to avoid leakage and impact on the surrounding environment
- 48% NaOH can negatively affect the environment if not handled properly:


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