Xut Naoh Long
Liquid Caustic Soda NaOH (CAS 1310-73-2) — Loc Thien Delivers to Industrial Zones Within the Day
Loc Thien Chemicals Co., Ltd. specializes in supplying liquid caustic soda NaOH (Sodium Hydroxide, CAS 1310-73-2) in concentrations of 32%, 45%, and 50% to factories and industrial zones in Ho Chi Minh City, Binh Duong Province, and Dong Nai Province. The product comes with complete documentation including CO/CQ/CoA/MSDS and complies with QCVN 40:2011 for industrial wastewater treatment.
Liquid Caustic Soda Concentration Comparison Table — Choose the Suitable Type
Concentration
Main Applications
Suitable Industries
Typical Dosage
NaOH 32%
Mild pH adjustment, surface cleaning
Food, textile dyeing
50–150 ml/m³ wastewater
NaOH 45%
Increase wastewater pH to 7–9, saponification of oils
Paper, rubber, chemicals
80–200 ml/m³ wastewater
NaOH 50%
High-capacity chemical reactions, metallurgy
Oil & gas, metallurgy, petrochemicals
Depends on technical process
Technical Specifications — Certifications CO/CQ/CoA/MSDS
Parameter
Details
Chemical Name
Sodium Hydroxide — Liquid Caustic Soda — Liquid NaOH
CAS Number
1310-73-2
Concentration
32%, 45%, 50% (tolerance ±1%)
Form
Colorless liquid solution
Packaging
25L cans, 220L drums, 1000L IBC tanker trucks
Documentation
CO, CQ, CoA (Certificate of Analysis), MSDS
Discharge Standard
QCVN 40:2011/BTNMT — Output pH 6–9
Applications of Liquid Caustic Soda NaOH by Industry
Wastewater Treatment — QCVN 40:2011: NaOH 45%/50% adjusts industrial wastewater pH to 6–9 as per QCVN 40:2011/BTNMT. Dosage: 80–200 ml/m³ depending on input pH.
Saponification of Oils: Liquid NaOH 32%–45% reacts with animal/vegetable oils in food factory wastewater, converting them into glycerol and water-soluble soap.
Textile Dyeing: Alkalizes dye solutions, fixes reactive dye colors, and bleaches cellulose fibers.
Paper Production: Kraft pulp cooking, lignin removal, and caustic soda recycling from black liquor.
Food Industry: Production of pretzels, olives, soy sauce (food grade standard).
Metallurgy & Oil & Gas: NaOH 50% neutralizes acids, treats metal surfaces, and removes sulfur from oil.
Industrial Zone Delivery — Ho Chi Minh City, Binh Duong, Dong Nai Within the Day
Loc Thien delivers liquid caustic soda NaOH directly to factory gates in key industrial zones:
🏭 VSIP I, VSIP II Industrial Zones — Binh Duong (same-day delivery)
🏭 Nhon Trach Industrial Zones I, II, III, V, VI — Dong Nai (same-day delivery)
🏭 Amata Industrial Zone — Bien Hoa, Dong Nai
🏭 Tan Binh, Cat Lai, Hiep Phuoc Industrial Zones — Ho Chi Minh City
🏭 Song Than, My Phuoc, Bau Bang Industrial Zones — Binh Duong
📦 Delivery: Orders placed before 2 PM → same-day delivery to industrial zones. Trucks 1–15 tons, IBC tankers.
📋 Included Documentation: VAT invoice, delivery note, CoA (Certificate of Analysis), CO/CQ, MSDS.
Guidelines for Calculating Liquid NaOH Dosage to Increase Wastewater pH
Input pH 4–5 → need to increase to 7–8 (meets QCVN 40:2011): use NaOH 45%, dosage 150–300 ml/m³
Input pH 5–6 → need to increase to 7–9: use NaOH 32%, dosage 80–150 ml/m³
Recommendation: Test small doses first, measure actual pH, adjust based on actual flow.
Install an automatic dosing system (dosing pump) combined with an online pH sensor.
Frequently Asked Questions — Liquid NaOH
What is liquid NaOH 32% used for?
NaOH 32% is suitable for: adjusting pH in domestic and light wastewater, industrial surface cleaning, fabric treatment in textile dyeing, soap and detergent production. Its moderate concentration makes it easier and safer to transport and store compared to NaOH 50%.
What’s the difference between NaOH 32%, 45%, and 50%? Which one to choose?
NaOH 32%: Lower corrosiveness, suitable for food applications and light wastewater treatment. NaOH 45%: Balances efficiency and transport safety, ideal for industrial wastewater treatment and paper production. NaOH 50%: Highest potency, used in metallurgy, oil & gas, and chemical synthesis, requiring specialized corrosion-resistant equipment. Recommendation: Factories treating wastewater per QCVN 40:2011 should use 45%, textile dyeing use 32%–45%, petrochemicals use 50%.
What is the dosage of liquid NaOH to increase wastewater pH to 7–9?
Reference dosage: NaOH 45% — pH from 4 to 7 requires approximately 150–250 ml/m³ wastewater; pH from 5 to 8 requires 80–150 ml/m³. Quick formula: Each unit of pH increase requires about 50–80 ml NaOH 45%/m³. Conduct a jar test as wastewater from each factory has different buffering capacities. Install a dosing pump + online pH sensor for automatic control to meet QCVN 40:2011.
Liquid NaOH vs NaOH flakes (99%) — when to use which?
Liquid NaOH (32–50%): Ready to use, no dilution needed, safer for bulk transport, suitable for automatic dosing systems. Ideal for continuous wastewater treatment, textile dyeing, and food production. NaOH flakes 99%: Pure concentration, requires dilution tanks and heat control (strong exothermic reaction during dilution), cost-effective for small quantities. Suitable for labs, handmade soap production. Conclusion: Industrial factories with continuous operations → choose liquid NaOH to save labor and ensure safety.
How does liquid NaOH saponify oils in food factory wastewater treatment?
Saponification reaction: oils + NaOH → glycerol + sodium soap (water-soluble). NaOH 32%–45% is pumped into oil separation tanks or equalization tanks, combined with mechanical mixing. Optimal temperature 40–60°C to accelerate the reaction. After the reaction, the saponified layer floats to the top and is skimmed off; wastewater continues to biological treatment. Typical dosage for slaughterhouse/seafood processing wastewater: 100–300 ml NaOH 45%/m³.
Where to buy liquid NaOH with same-day delivery to Binh Duong, Dong Nai Industrial Zones?
Loc Thien delivers liquid NaOH to factory gates in VSIP I/II Industrial Zones (Binh Duong), Nhon Trach Industrial Zones (Dong Nai), and Amata Industrial Zone (Bien Hoa) within the day for orders placed before 2 PM. Complete documentation: CO, CQ, CoA, MSDS, VAT invoice. Contact: ☎ 0979 891 929 for immediate pricing.
📞 Hotline for consultation & orders: 0979 891 929 (Same-day delivery to industrial zones)