Sodium hypochlorite, with the chemical formula NaClO (commonly written as NaOCl in electronic notation), is a common and widely used hypochlorite compound. It is highly soluble in water.
【CAS】64-17-5 Molecular formula: NaClO Relative molecular mass:74.44
Structural formula:
一．Product Property
A pale yellow solution with a chlorine-like odor. 1. It is highly soluble in water to form sodium hydroxide and hypochlorous acid. Hypochlorous acid then decomposes to produce hydrogen chloride and oxygen, due to the strong oxidizing ability of the newly generated oxygen, so sodium hypochlorite is a strong oxidizing agent. Its stability is affected by light, heat, heavy metal cations and pH value. It has a stimulating odor. No anhydrous reagent has been isolated yet. The alkaline solution is a colorless liquid. It slowly decomposes to produce NaCl, NaClO3 and O2. The decomposition rate is related to concentration and free alkali. Light or heating can accelerate the decomposition.
二．Quality Index:
| Parameter | Specification (Typical Values) | Test Method |
| Available Chlorine (as Cl₂) | 5% – 15% (w/v) | Titration (ASTM D2022) |
| Sodium Hydroxide (NaOH) | 0.1% – 1.0% (w/v) (for stability) | Titration (ISO 981) |
| Sodium Chloride (NaCl) | ≤ 3% (w/v) | ICP-MS / Titration |
| Heavy Metals (as Pb) | ≤ 1 ppm | ICP-OES (USP <231>) |
| Arsenic (As) | ≤ 0.5 ppm | ICP-MS (AOAC 999.10) |
| Iron (Fe) | ≤ 10 ppm | AAS / ICP-OES |
| Mercury (Hg) | ≤ 0.1 ppm | Cold Vapor AAS |
| Chlorate (ClO₃⁻) | ≤ 0.5% (w/v) | Ion Chromatography |
| Perchlorate (ClO₄⁻) | ≤ 0.1% (w/v) | Ion Chromatography |
| pH (at 20°C) | 11 – 13 (for stability) | pH Meter (ISO 4316) |
| Insoluble Matter | ≤ 0.1% (w/v) | Filtration & Gravimetry |
三．Application scope and Usage
Food-grade sodium hypochlorite is an efficient disinfectant that is widely used in water treatment for drinking water, pool disinfection, food production, and hospital wastewater treatment.
四．Package and Storage
Packaged in plastic barrels or other packaging containers of 25kg , the injection port should be covered and sealed, or a dedicated tanker with a sealing cover should be used. Store in a cool and ventilated warehouse. Keep away from fire sources and heat sources. The warehouse temperature should not exceed 30℃. It should be stored separately from alkaline substances and must not be mixed. Appropriate emergency handling equipment for leakage and suitable containment materials should be available at the storage area.
五． Safety Protection:
Skin contact: Remove contaminated clothing and rinse with plenty of flowing water.
Eye contact: Lift the eyelids and rinse with flowing water or normal saline immediately and seek medical attention.
Inhalation: Quickly leave the scene to an area with fresh air. Keep the airway clear; if breathing is difficult, administer oxygen; if breathing stops, perform artificial respiration and seek immediate medical attention.
Ingestion: Drink plenty of warm water. Do not induce vomiting. Seek medical attention promptly.
