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4.  Sodium Hypochlorite 

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# Sodium Hypochlorite

chemistry 

The liquid chlorine disinfectant commonly known as bleach.

## Definition

Sodium hypochlorite (NaOCl) is a chlorine-releasing compound supplied as an aqueous solution. When diluted in water it generates hypochlorous acid, providing broad-spectrum disinfection. It is one of the oldest and most widely used chlorine disinfectants, but its concentration can degrade over time and varies between batches and storage conditions.

## Why it matters

Because it is a liquid concentrate, sodium hypochlorite requires careful manual measurement to achieve the correct in-use concentration. Small errors in pouring, water volume or measuring vessels can lead to inconsistent chlorine strength between preparations and shifts.

## Practical applications

Used in healthcare cleaning, laundry, water treatment, food processing and general institutional disinfection, often as an alternative to tablet-based systems such as NaDCC.

## Related terms

[Active Ingredient](/knowledge-center/glossary/active-ingredient)[Air Particle Count](/knowledge-center/glossary/air-particle-count)[Bleach](/knowledge-center/glossary/bleach)[Chlorine Concentration](/knowledge-center/glossary/chlorine-concentration)[Chlorine Demand](/knowledge-center/glossary/chlorine-demand)[Chlorine-Releasing Agent](/knowledge-center/glossary/chlorine-releasing-agent)

## Referenced in

-   [The Technical Guide to NaDCC Disinfectant Tablets: Chemistry, Dilution, and Operational Implementation](/knowledge-center/articles/nadcc-disinfectant-tablets-technical-guide)
-   [What is Disinfection?](/knowledge-center/articles/what-is-disinfection)
-   [NaDCC vs Sodium Hypochlorite](/knowledge-center/articles/nadcc-vs-sodium-hypochlorite)
-   [What is NaDCC?](/knowledge-center/articles/what-is-nadcc)

## Need help applying this?

Our team can help design the right disinfection protocol for your operation.

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