Introduction to Sodium Hypochlorite (Javen)
Sodium Hypochlorite (NaOCl) – commonly called Javen – is an active chlorine solution used to disinfect, sterilize and effectively control moss and algae.
The product is light yellow in color, has a characteristic chlorine smell, and is easy to use on many scales from household to industrial, especially water treatment systems.
Chemical and physical properties
| Parameter | Details |
|---|---|
| Chemical formula | NaOCl |
| Form | Pale yellow liquid solution |
| Odor | Characteristic chlorine smell |
| pH (concentrated) | ~11–13 (alkaline) |
| Proportion | ~1.11–1.15 g/cm³ |
| Commercial concentrations | 10–12% w/w (depending on batch) |
| Specification | 30L can, 200L drum, 1000L IBC |
Applications & areas of use
- Water treatment & tanks: Disinfection maintains residual chlorine according to standards, ensuring safe water supply.
- Pool: Maintain residual chlorine to control microorganisms, algae and clarify water as recommended.
- Wastewater: Disinfect after sedimentation/filtration to meet output microbiological requirements according to standards.
- Cleaning and hygiene: Clean industrial surfaces, restrooms, and healthcare facilities according to safety guidelines.
Reference dosage
- Water supply/tank: 2–5 mL 12% NaOCl/m³ to achieve ~0.3–0.5 mg/L residual chlorine. Always measure with a test kit for calibration.
- Pool: Maintain ~1.0–3.0 mg/L residual chlorine. Shock for turbidity/algae: 10–15 mL/m³; control pH 7.2–7.6.
- Wastewater: 5–10 mg/L active chlorine depending on output microbial requirements; monitor ORP/residual chlorine to optimize costs.
Reaction/Process for Making Sodium Hypochlorite
NaOCl is formed when chlorine gas reacts with NaOH solution under controlled conditions, giving active chlorine suitable for disinfection.
Equation: Cl2 + 2NaOH → NaCl + NaOCl + H2O
Safe – Secure – Compatible
- Concentrated, corrosive. Wear suitable gloves, goggles, and face shield when handling; avoid skin/eye contact.
- Do not mix with acids or ammonia/reducing agents. Avoid contact with HCl because it can generate toxic chlorine gas.
- Store in a cool, dark, well-ventilated place. Avoid sunlight/heat because NaOCl decomposes easily, reducing concentration.
- Use PP/PE/PVC pump/pipe; avoid corrosive metals.
Central delivery service
Warehouse in Da Nang – Quang Nam – Quang Ngai. Fast dispatch of vehicles within the day (depending on route) and support for IBC pumping upon request.
VAT invoice, attached COA/MSDS and on-site safe operating instructions for water treatment systems.
Call now: (+84)979 891929
Get a quick quote
Contact Loc Thien Company
Address: 452/6B Provincial Road 10, Binh Tri Dong Ward, Binh Tan District, Ho Chi Minh City
Phone: 028 6269 5669 – 028 6269 5662 | Hotline: (+84) 979 891 929
Email: locthien@locthien.vn | Website: www.locthien.vn - hoachatcoban.net
Frequently Asked Questions (FAQ)
How is NaOCl different from chlorine powder (TCCA/CA)?
NaOCl is a solution, direct to the point of injection and reacts quickly. TCCA/CA is a solid, releases chlorine more slowly and is easy to store.
How to preserve NaOCl to limit concentration loss?
Keep in a cool, dry place away from sunlight, tightly closed and open as little as possible. Use within 1–3 months depending on storage conditions.
Can NaOCl be used for drinking water?
Use only as directed and as directed by a professional. Always monitor residual chlorine, contact time and water quality.
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