Liquid chlorine

Liquid chlorine is the liquefied form of chlorine gas (Cl), stored under pressure or at low temperatures.

Basic Information

• Chemical formula: Cl

• CAS number: 7782-50-5

• Appearance: Clear amber/yellow-green liquid

• Odor: Sharp, pungent (bleach-like)

• State: Gas at room temperature; becomes liquid under pressure

Key Properties

• Highly reactive and strong oxidizing agent

• Toxic and corrosive

• Heavier than air (gas form can settle in low areas)

• Reacts with water to form hydrochloric acid (HCl) and hypochlorous acid (HOCl)

Common Uses

• Water treatment (drinking water & swimming pools)

• Manufacture of PVC (polyvinyl chloride)

• Production of bleaches and disinfectants

• Paper and textile processing

Safety Precautions

• Extremely toxic if inhaled

• Causes severe irritation to eyes, skin, and lungs

• Stored in pressurized cylinders or tanks

• Requires proper ventilation and protective gear

Transport & Classification

• UN Number: 1017

• Hazard Class: 2.3 (Toxic gas)

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