Collection: Hydrogen Chloride (HCl)

Hydrogen chloride gas does not burn or support combustion, but it still presents significant risks because of its corrosive nature and the high pressure conditions in which it is often stored. If cylinders are exposed to heat, damage or improper handling, the sudden release of gas or failure of the container can cause serious harm to people, equipment and infrastructure. Contact with incompatible materials such as reactive metals, strong bases or oxidising agents can lead to violent chemical reactions and the release of hazardous by products, which may quickly escalate an incident if not controlled.

Hydrogen chloride gas is highly toxic and corrosive, posing a major risk to human health if inhaled or if it comes into contact with the skin or eyes. Even short duration exposure can cause irritation to the respiratory system, leading to coughing, discomfort and breathing difficulty, while higher concentrations may result in chemical burns, respiratory damage, pulmonary oedema and potentially fatal injury. Because the gas forms hydrochloric acid when it meets moisture, it can rapidly damage tissue and therefore requires strict control of exposure levels in the workplace.

Careful storage, handling and transfer of hydrogen chloride gas are essential to prevent leakage, equipment failure or accidental exposure. Cylinders should be kept upright in secure and well ventilated areas, away from incompatible substances and protected from heat or physical impact. Personnel must be trained and equipped with suitable personal protective equipment including eye and face protection, chemical resistant gloves and respiratory protection where required. A thorough understanding of the hazards associated with hydrogen chloride gas, supported by clear procedures, emergency readiness and ongoing risk assessment, is vital for ensuring safe operation and regulatory compliance.