Javen NaOCl Complete Guide — CAS 7681-52-9 | COA/MSDS per batch

TL;DR: Javen NaOCl (Sodium Hypochlorite, CAS 7681-52-9) is a strong oxidizing solution used for disinfecting domestic water, wastewater, textile bleaching and industrial sanitation. Loc Thien supplies Javen 10–12% with COA/MSDS per batch. A nationwide system of 6 warehouses and a fleet of tanker trucks (5–30 tons) delivers to Industrial Parks per our delivery policy (inner HCMC within 4 hours; Southern IZs 24–48 hours).

What Is Sodium Hypochlorite Solution (Javen Water / NaOCl)? Overview of Sodium Hypochlorite

Javen water is the common commercial name for Sodium Hypochlorite solution, chemical formula NaOCl, CAS number 7681-52-9. It is a strong oxidizer produced by reacting chlorine gas (Cl₂) with caustic soda solution (NaOH): 2NaOH + Cl₂ → NaCl + NaOCl + H₂O. The commercial product is a pale yellow liquid with a characteristic chlorine odor, pH in the range of 11–13 (strongly alkaline) and Specific Gravity of 1.16–1.20 g/mL at 20°C. Other names include Javel, bleach liquor, sodium hypochlorite water. In industry, Javen is typically distinguished by its Available Chlorine concentration: 5%, 10%, 12% — of which Javen 10% is the most versatile grade, suitable for domestic water treatment, swimming pools and food sanitation. Loc Thien supplies Javen 10–12% for water treatment, textile and electroplating. The product comes with batch-specific COA, MSDS and QCVN 01:2009/BYT certification.

Javen NaOCl Technical Specifications (CAS 7681-52-9)

Important note: The recorded Specific Gravity of 1.16–1.20 g/mL is data from actual batch COA. Customers should verify the batch COA before use for the most accurate parameters. Loc Thien sends COA upon request within 24 hours.

NaOCl Mechanism of Action — Why Javen Disinfects Effectively?

The disinfection mechanism of Javen relies on the strong oxidizing power of hypochlorous acid (HOCl) — the active form of chlorine in water. When NaOCl dissolves in water, it dissociates into HOCl and OCl⁻. At pH 6–7.5, HOCl predominates and is 80 times more effective at killing bacteria than OCl⁻. HOCl destroys microorganism cell membranes by oxidizing essential proteins and enzymes, killing bacteria, viruses and fungi within seconds. Conversion formula: 1% available chlorine ≈ 10,000 mg/L (ppm). Thus a 10% NaOCl solution contains approximately 100,000 mg/L available chlorine. Compared to Cl₂ gas, Javen is easier to use, requires no pressure equipment, and is safer to operate. Compared to H₂O₂, Javen has significantly lower cost and more stable disinfection efficiency at neutral pH. This is why NaOCl is the optimal choice for most water treatment applications in Vietnam.

Javen Applications in Water Supply and Wastewater Treatment

Drinking water treatment: Javen is used to disinfect source water at water treatment plants, Industrial Park water supply stations, maintaining residual chlorine in the distribution network at 0.3–0.8 mg/L per QCVN 01:2009/BYT. The required dose of Javen 10% is approximately 0.5 ml/m³ of water, adjusted according to raw water quality. An automatic Javen dosing system paired with an online residual chlorine sensor enables precise dosage control, reduces chemical costs and ensures output water safety.

Industrial wastewater treatment: NaOCl oxidizes difficult-to-degrade organic compounds and disinfects effluent to meet QCVN 40:2025/BTNMT (replacing QCVN 40:2011, effective September 1, 2025). In the electroplating industry, Javen plays a key role in cyanide (CN⁻) oxidation: the reaction CN⁻ + OCl⁻ → OCN⁻ + Cl⁻ converts highly toxic cyanide into less toxic cyanate. Real case study: a factory in Long Hau Industrial Park — treatment system 30 m³/h, influent CN⁻ 45 ppm, alkaline pH. After dosing NaOCl at a Cl:CN ratio of 3:1 in a reaction tank at pH 10–11, retention time 15 minutes, effluent CN⁻ dropped below 0.1 ppm, meeting QCVN 40 discharge standards. Chemical cost for CN⁻ treatment with Javen is significantly lower than the H₂O₂ method at the same scale.

Textile wastewater treatment: Javen combined with PAC and polymer flocculant effectively decolorizes textile wastewater. Javen dose 200–500 ml/m³ depending on effluent color, with a reaction tank at pH 7–8. Residual chlorine after treatment must be neutralized with Na₂S₂O₃ before discharge.

Swimming pools: Maintain residual chlorine at 1–3 mg/L, periodic shock dosing at 5–10 times normal levels for algae treatment.

Properties of Javen solution and chemical characteristics | Javen industrial production process

Javen in Textile Bleaching and Paper Production

In the textile industry, Javen is used to bleach cotton fibers, remove old dye stains and brighten fabric surfaces before new dyeing. Typical dilution ratio: 1 liter of Javen 12% mixed with 10 liters of water (achieving ~12,000 ppm available chlorine), soak fibers for 15–30 minutes at room temperature, then neutralize with Na₂S₂O₃ or rinse thoroughly with clean water. For finished fabric bleaching, Javen 10% dose 100–200 ml/L, heat to 40–50°C, contact time 20–40 minutes. The bleaching process requires pH control at 9–11 to optimize HOCl and avoid fiber damage.

In paper production, Javen bleaches pulp, removes residual lignin, increases ISO brightness. The ECF (Elemental Chlorine Free) bleaching process uses NaOCl instead of Cl₂ gas, reducing AOX emissions and meeting EU environmental standards. NaOCl dose 1–3% of dry pulp weight, at pH 9–11, temperature 40–70°C.

A note on ZDHC documentation: ZDHC (Zero Discharge of Hazardous Chemicals) is a global standard for input chemical management in the textile and footwear industry. Brands/ZDHC may ask for MRSL documentation for input chemicals; Javen is a process chemical, so it depends on the documentation of each product. Every Javen batch comes with a COA and MSDS; if a brand requires ZDHC documentation, contact Loc Thien to confirm the documents currently available for each product. Combining Javen with PAC poly aluminium chloride in textile wastewater treatment helps meet QCVN standards effectively.

CIP Food Applications and Surface Disinfection

In the food processing industry, Javen is used in CIP (Clean-in-Place) procedures to disinfect equipment, tanks and pipelines without disassembly. Additionally, Javen disinfects surfaces in hospitals, clean rooms, food factories and seafood processing areas. Standard dilution table for Javen 10–12% by purpose:

Basic dosage formula: Dose (L/h) ≈ [Q (m³/h) × target chlorine (mg/L)] / [10 × %Available Chlorine]. Example: system 100 m³/h, target 2 mg/L, using Javen 10% → [100 × 2] / [10 × 10] = 2 L/h.

Javen 10% vs 12% — Which One to Choose?

Javen 10% and Javen 12% both have the same NaOCl formula, CAS 7681-52-9, the main difference being the Available Chlorine content. Javen 10% (Available Chlorine 10% ± 0.5%, Specific Gravity 1.16 g/mL) is the flexible choice for most applications: domestic water treatment, swimming pools, food disinfection, surface sanitation. Javen 10% is easier to dose accurately, suitable for automatic dosing systems requiring high precision. Javen 12% (Available Chlorine 12% ± 0.5%, Specific Gravity 1.18 g/mL) is more concentrated, suitable for heavy industrial wastewater treatment, hospital disinfection, strong textile bleaching, and applications requiring high chlorine concentration. Transport costs for Javen 12% are lower per unit of available chlorine. Recommendation: use Javen 10% for versatility, safety and flexibility; use Javen 12% when high concentration and large volumes are needed. Loc Thien supplies both grades. Guide to buying Javen NaOCl in bulk

Safe Usage and Dilution Guide for Javen

Golden rules: Always add Javen to water, never the reverse. Adding water to concentrated Javen can cause a strong exothermic reaction and chemical splashing. Do not mix Javen with acids (HCl, H₂SO₄) as this produces toxic Cl₂ gas. Do not mix with ammonia or ammonium compounds as this produces toxic chloramines. Always wear PPE: chemical-resistant gloves, safety goggles, respirator with gas filter, rubber boots. Work in a well-ventilated area with exhaust system.

Reference dosage formula: Dose (L/h) = [Q (m³/h) × Target residual chlorine (mg/L)] / [10 × Available Chlorine concentration (%)]

Example: Domestic water treatment system 50 m³/h, target residual chlorine 0.5 mg/L, using Javen 10%: Dose = [50 × 0.5] / [10 × 10] = 0.25 L/h = 250 ml/h (assumes Javen 10% ≈ 100 g available chlorine/L — verify against each batch COA; this is the minimum dose for the residual target and excludes the water’s chlorine demand).

Effectiveness check: Use a DPD test kit to measure residual chlorine. Maintain output residual chlorine per QCVN. Adjust dose if results are not met. When diluting, use only clean water, not hot water, not water with high Fe/Mn content.

Javen vs Chlorine — which one to choose?

Javen Storage — Shelf Life and Important Notes

Javen is an unstable chemical — its Available Chlorine concentration decreases over time. The decomposition rate depends on temperature, light, concentration and the presence of metal ions (Fe, Cu, Ni, Co). At 30°C, the decomposition rate is 3–5 times faster than at 15°C. Ultraviolet (UV) light catalyzes the decomposition of NaOCl into NaCl and O₂.

Ideal storage conditions:

• Temperature 5–25°C, cool place, out of direct sunlight. Cold storage is preferred for maintaining concentration.
• Sealed HDPE containers — do not use metal containers (Fe, Cu catalyze decomposition). Close lid tightly after each use.
• Do not store with acids, ammonia, strong reducing agents, flammable organic materials.
• Warehouse area: large enough to separate Javen from incompatible chemicals.

Reference concentration loss:

• Under good storage conditions (cool, dark, sealed HDPE): concentration drops 5–10% after 3 months.
• Temperature >30°C or light exposure: drops 15–25% after 3 months.
• After 6 months: concentration decreases significantly — check COA before use.

Recommended inventory management: Apply FIFO (First In, First Out). Record receipt date, initial concentration, estimated shelf life on each batch. Periodically check concentration with a refractometer or iodometric titration.

Loc Thien operates 6 warehouses nationwide (Ba Ria – Vung Tau, Dong Nai, Binh Duong, Da Nang, Can Tho and Bac Ninh) with a dedicated fleet of 5–30 ton tanker trucks, strictly applying FIFO to ensure fresh stock and stable concentration. Delivery to Industrial Parks in Ho Chi Minh City (within 4 hours), Binh Duong and Dong Nai (24–48 hours).

Why Choose Loc Thien for Javen NaOCl Supply?

1. Real batch-specific COA Every Javen batch comes with a COA (Certificate of Analysis) clearly stating Available Chlorine concentration, pH, Specific Gravity. Documents sent upon request within 24 hours. Full quality transparency.

2. 6 warehouses nationwide + a fleet of tanker trucks 5–30 tons Warehouse network across 3 regions (North, Central, South), a fleet of dedicated tanker trucks with hazardous materials transport permits. Delivery to Industrial Parks in Ho Chi Minh City (within 4 hours), Binh Duong and Dong Nai (24–48 hours).

3. Real-name QC and technical team QC department: Phan Cam Thuy, Vo Thi Nhu Hoa — quality inspection of every batch before shipment. Technical team advises on dosage, dosing system design, deployment support.

4. Positioning: Supplier + Direct Importer Loc Thien (Tax Code MST 0313650856) is a large-scale industrial chemical supplier, direct importer via official channels, serving factories inside and outside Industrial Parks since 2016.

🛒 Need industrial Javen NaOCl? Buy NaOCl Javen 10% — Bulk Price, COA/MSDS, Delivery to Industrial Parks Nationwide | Buy NaOCl Javen 12% — Bulk Price, Delivery to Industrial Parks. Hotline 0979 891 929.

CTA Progressive:

1. Send quotation request (quantity + packaging + delivery point)
2. Loc Thien responds with quote within 15 minutes
3. Confirm the delivery schedule to Industrial Parks

Frequently Asked Questions (FAQ)

What is Javen water? What is its chemical formula?

Javen water is Sodium Hypochlorite solution (NaOCl, CAS 7681-52-9), a pale yellow liquid, pH 11–13, Specific Gravity 1.16–1.20 g/mL. Produced from the reaction Cl₂ + NaOH, it has strong oxidizing properties used for disinfection and bleaching.

What is the difference between Javen 10% and 12%?

Javen 10% (Cl 10% ± 0.5%) is versatile for domestic water treatment, food, swimming pools. Javen 12% (Cl 12% ± 0.5%) is more concentrated for industrial wastewater, hospitals, strong bleaching. Same CAS 7681-52-9.

How to dilute Javen for drinking water disinfection?

Maintain residual chlorine at 0.2–0.5 ppm. With Javen 10%, dilute ~0.5 ml/m³ of water. Check with a DPD test kit, ensure residual chlorine meets QCVN 01:2009/BYT.

Can Javen destroy Cyanide (CN⁻) in electroplating?

Yes. NaOCl oxidizes CN⁻ into less toxic OCN⁻: CN⁻ + OCl⁻ → OCN⁻ + Cl⁻. Loc Thien supplies Javen with batch COA/MSDS for the electroplating industry.

Where to buy industrial Javen reliably?

Loc Thien — 6 warehouses nationwide, a fleet of tanker trucks 5–30 tons, batch COA/MSDS. Contact 0979 891 929 — quote within 15 minutes, delivery to Industrial Parks per our delivery policy.

Does Javen have a shelf life?

Yes. Javen loses 5–10% concentration after 3 months. Store in a cool place (5–25°C), out of sunlight, in sealed HDPE containers. Loc Thien always delivers fresh stock with FIFO rotation.

Is Javen safe for users?

PPE required (gloves, goggles, mask). Do not mix with acids or ammonia (risk of toxic Cl₂ gas/chloramines). If skin contact: rinse with clean water ≥15 minutes.

How is Javen different from Cl₂ gas and H₂O₂?

Javen is easy to use, needs no pressure equipment, low cost. Cl₂ is highly effective at large scale but dangerous. H₂O₂ is more environmentally friendly but expensive, pH-dependent efficiency. NaOCl is optimal for most applications in Vietnam.

Javen NaOCl Quotation — Contact Loc Thien

Receive a quotation for Javen 10%, Javen 12% by quantity, packaging and delivery point.

• Hotline/WhatsApp/Zalo: 0979 891 929
• Email: [email protected]
• Response time: 15 minutes (business hours)
• Delivery: within 4 hours in inner Ho Chi Minh City; 24–48 hours to Southern Industrial Parks (Binh Duong, Dong Nai); 2–3 days to Northern and Central Vietnam.

Combine Javen with NaOH 32% and PAC for optimized water treatment efficiency.

This article is part of the Javen NaOCl Complete Guide series — Updated September 2026. Technical specifications based on actual batch COA. QC: Phan Cam Thuy, Vo Thi Nhu Hoa. Loc Thien Investment and Development Co., Ltd. — Tax Code MST 0313650856.