Product Overview
Sodium Hypochlorite 5.25% is a Technical Grade oxidizing solution used across water treatment, textile bleaching, and general industrial sanitation. At this concentration, it delivers reliable chlorine-based oxidation in a form that operators can handle, dilute, and dose without the extreme corrosivity of higher-strength hypochlorite. The product is classified as a Class 8 corrosive for transport (UN1791, per 49 CFR 172.101), and Alliance Chemical ships it in DOT-compliant packaging from our Taylor, TX warehouse.
Available to order in sizes from 1-quart bottles through 330-gallon totes, this concentration serves facility maintenance crews, municipal water operators, textile processors, and lab technicians who need a moderate-strength hypochlorite that can be metered directly or diluted to lower working levels.
Why This Concentration
The 5.25% concentration sits at the practical midpoint of the sodium hypochlorite range. It is strong enough to deliver meaningful oxidation and microbial control in water treatment systems, yet dilute enough to reduce the handling severity that comes with higher-strength solutions. Operators working with this concentration still face Class 8 corrosive hazards — skin burns and metal corrosion are real risks (per the product's GHS classification) — but the lower active-chlorine content means less off-gassing, slower decomposition in storage, and a wider margin for dosing error compared to concentrated grades.
For buyers whose process demands a higher available-chlorine load — large-volume municipal disinfection, heavy-duty CIP circuits, or wastewater with high organic demand — Sodium Hypochlorite 12.5% delivers more than double the active chlorine per gallon, reducing freight cost per unit of oxidizing power. The trade-off is tighter storage requirements and more aggressive corrosion. If your feed system is already calibrated for a 5% solution, or your application calls for a gentler oxidizer, this 5.25% Technical Grade is the practical pick.
Chemical Profile
Sodium Hypochlorite 5.25% is a liquid solution with the molecular formula ClNaO and a molecular weight of 74.44 g/mol (CAS 7681-52-9). In this aqueous form, it appears as a colorless or slightly yellow watery liquid carrying the characteristic odor of household bleach — sometimes described as a disagreeable, sweetish odor at closer range. The solution has a density of 1.08 at 20 °C, making it slightly heavier than water. Sodium hypochlorite is highly water-soluble at 29.3 g per 100 g of water at 0 °C, and the solution exerts a vapor pressure of 2–2.5 kPa at 20 °C — enough to generate noticeable chlorine odor in enclosed or poorly ventilated spaces.
Industrial Applications
Sodium Hypochlorite 5.25% is put to work wherever a liquid-phase oxidizer or chlorinating agent is needed at moderate strength.
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Water Treatment — Municipal and industrial water systems dose sodium hypochlorite to control microbial growth in potable water, cooling towers, and wastewater effluent. At 5.25%, the solution can be metered through standard chemical feed pumps without the extreme corrosion rates that accelerate pump-seal and injector wear at higher concentrations.
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Bleaching Agent — Textile mills and pulp operations use sodium hypochlorite as a bleaching agent to oxidize color bodies in fabric and fiber. The 5.25% strength allows controlled whitening with lower risk of fiber degradation compared to concentrated hypochlorite or chlorine gas.
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pH Adjustment — As a strongly alkaline solution, sodium hypochlorite serves double duty in processes that need both oxidation and upward pH correction. Chemical manufacturing lines use it to neutralize acidic process streams while simultaneously introducing chlorine-based oxidation.
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Oxidizing Agent — In chemical processing, this solution acts as a liquid oxidizer for reactions that require a controlled chlorine source — organic chlorination steps, sulfide oxidation in odor-control systems, and cyanide destruction in metal-finishing rinse water.
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Laboratory Reagent — Research and QC labs stock Technical Grade sodium hypochlorite for general-purpose oxidation, sterilization of glassware and work surfaces, and preparation of dilute chlorine standards for analytical procedures.
Handling & Storage
Sodium Hypochlorite 5.25% carries a Danger signal word (per the product's GHS classification). The hazard profile is real: it may be corrosive to metals (H290), causes severe skin burns and eye damage (H314), and is very toxic to aquatic life with long-lasting effects (H400, H410). Contact with acids can release toxic gas (EUH031). Treat every container as a corrosive oxidizer — no exceptions.
Operators should wear chemical-splash goggles, face shield, and chemical-resistant gloves (nitrile or butyl rubber) at a minimum. Use in a well-ventilated area or under local exhaust; the vapor pressure of 2–2.5 kPa at 20 °C means chlorine off-gas accumulates quickly in enclosed spaces.
Store in a cool, dry location out of direct sunlight. Heat and UV accelerate decomposition and reduce available chlorine over time. Use HDPE, glass, or other materials rated for hypochlorite service — common metals, including carbon steel and aluminum, corrode on contact. Keep away from acids and reducing agents; mixing with acids liberates chlorine gas rapidly. Segregate from organic materials, ammonia, and peroxides.
Hazmat & Shipping
Sodium Hypochlorite 5.25% is regulated for transport as a hazardous material. Every shipment from Alliance Chemical is classified, packaged, marked, and documented in accordance with DOT requirements. Shipping guidance reviewed by Andre Taki, DOT Hazmat Specialist.
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UN Number: UN1791 (per 49 CFR 172.101)
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Hazard Class: 8 — Corrosive (per 49 CFR 172.101)
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Packing Group: III (per 49 CFR 172.101)
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Proper Shipping Name: Hypochlorite solutions (per 49 CFR 172.101)
All containers ship with required hazmat markings and documentation. Packaging is selected to meet or exceed Packing Group III performance standards for Class 8 corrosives.
Documentation
A Safety Data Sheet ships with every order. SDS documents are available in English, Spanish, French, and Japanese. A Technical Data Sheet is also provided. Lot-specific Certificates of Analysis are available on request, giving buyers batch-level traceability for their quality records.
Why Buy from Alliance Chemical
This product is available to order in sixteen configurations — from single quarts for bench-scale evaluation up to 330-gallon totes for continuous-feed industrial systems — all shipped as properly classified Class 8 corrosive with full DOT documentation. Alliance Chemical has operated as a hazmat chemical distributor since 1998, serving over 50,000 customers from our warehouse at 204 S Edmond St, Taylor, Texas 76574. Shipping and handling guidance on this page has been reviewed by Andre Taki, DOT Hazmat Specialist.
