Definition

Noun 1. A chemical compound used for bleaching and disinfection: Sodium hypochlorite is an unstable inorganic salt with the chemical formula NaOCl. It is commonly used in aqueous solution as a powerful oxidizing agent for bleaching materials and as a disinfectant or sanitizer.

Usage

Sodium hypochlorite is primarily used as a technical or industrial term. It refers to the specific chemical compound itself, often in the context of its commercial solutions. * As a subject: "Sodium hypochlorite is effective against a broad spectrum of microorganisms." * As an object: "The laboratory uses a dilute solution of sodium hypochlorite to sterilize equipment." * With a modifier: "Household bleach typically contains about 3-8% sodium hypochlorite."

Examples

• "For surface disinfection, a 0.1% solution of sodium hypochlorite is recommended."
• "The breakdown of sodium hypochlorite over time releases chlorine, which accounts for its strong odor."
• "In water treatment plants, sodium hypochlorite is an alternative to chlorine gas for disinfection."

Advanced Usage

• Chemical Context: In chemistry, it is described as the sodium salt of hypochlorous acid (HOCl). Its instability means it decomposes, especially when exposed to light or heat.
• Commercial Context: It is rarely handled in its pure salt form. The term almost always refers to its solution in water, which is marketed under various names like liquid bleach, chlorine bleach, or simply "bleach."

Variants and Related Words

• Hypochlorite (noun): The anion (OCl⁻) or any salt containing it. Sodium hypochlorite is the most common example.
• Bleach (noun/common term): A general term for substances that whiten or remove color. In common usage, "household bleach" is synonymous with a dilute solution of sodium hypochlorite.
• Disinfectant (noun): A substance used to destroy harmful microorganisms. Sodium hypochlorite is a type of disinfectant.

Synonyms

• Liquid bleach (when referring to its common aqueous form)
• Chlorine bleach (common commercial name)
• Antiformin (a historical/trade name for a similar solution)

Important Notes

• Sodium hypochlorite is corrosive and can cause damage to skin, eyes, and respiratory tract. It should be handled with care.
• It is a reactive chemical. A critical safety warning is that it must never be mixed with acids or ammonia-based cleaners, as this produces toxic chlorine or chloramine gas.

Noun

1. an unstable salt (NaOCl) used as a bleaching agent and disinfectant