Sodium hypochlorite

Buyers must prioritize the Available Chlorine Content, typically ranging from 10% to 15% for industrial grades. It is crucial to verify the Stability and Decomposition Rate, as sodium hypochlorite is light and heat-sensitive. Ensure the Iron (Fe) and Heavy Metal content is kept to a minimum (e.g., Fe < 0.001%) to prevent catalytic decomposition. Additionally, check the Free Alkali (as NaOH) levels, which should generally be between 0.1% and 1.0% to maintain solution stability during storage.

For water treatment applications, ensure the product meets NSF/ANSI Standard 60 certification. For general industrial and disinfectant use, suppliers should provide a Safety Data Sheet (SDS) compliant with the GHS (Globally Harmonized System). In the EU market, REACH registration is mandatory, while in the US, EPA registration may be required if the product is marketed as a pesticide or disinfectant. Always verify the ISO 9001:2015 certification of the manufacturer to ensure consistent quality management.

Sodium Hypochlorite is widely used in Water Treatment (disinfection), Textile Bleaching, and Industrial Cleaning. Due to its corrosive nature, it must be stored in UV-resistant, high-density polyethylene (HDPE) or FRP (Fiberglass Reinforced Plastic) tanks. It is vital to maintain a cool, dark environment to prevent the loss of active chlorine. Buyers should also ensure the storage area has secondary containment to manage potential leaks and is kept away from acids and ammonia to avoid toxic gas release.

Sodium Hypochlorite is classified as a Class 8 Corrosive Substance (UN 1791). It must be shipped in UN-approved packaging, such as IBC tanks (1000L) or specialized drums. For sea freight, the supplier must provide a Dangerous Goods (DG) Declaration and a Container Packing Certificate. Ensure the shipping line accepts IMDG (International Maritime Dangerous Goods) shipments and that the transit time is minimized to prevent product degradation due to temperature fluctuations.

Utilize Made-in-China.com's Secured Trading services to protect your payments until the goods are shipped. It is highly recommended to commission a Third-Party Inspection (such as SGS or BV) to perform a Pre-Shipment Inspection (PSI) to verify the active chlorine concentration and packaging integrity. Avoid suppliers who cannot provide a valid hazardous chemicals business license or those who suggest shipping hazardous liquids as 'general cargo,' as this poses significant legal and safety risks.

Prices for Sodium Hypochlorite are often tied to the Chlor-alkali market index. Negotiate based on volume tiers, as bulk orders in ISO tanks or full container loads (FCL) can reduce unit costs by 15-20%. In the contract, clearly define the 'Available Chlorine' at the time of arrival, not just at the time of production, to account for natural degradation. Use Incoterms 2020 like CIF or DAP to ensure the seller handles the complex hazardous material export documentation.