Which hazard class is associated with poisonous gases such as chlorine and phosgene?

Which hazard class is associated with poisonous gases such as chlorine and phosgene?

• A. Class 2.2 Non-Flammable Gases
• B. Class 7 Radioactive Substances
• C. Class 2.3 Toxic Gases
• D. Class 3 Flammable Liquids

Answer: (C)

Poisonous gases are categorized by toxicity, not by flammability or radioactivity. Chlorine and phosgene are gases that cause serious health effects if inhaled, even in small amounts, so their primary hazard is toxic inhalation risk. That’s why they are placed in the toxic gases group within the gases category. This differs from non-flammable gases (which are not toxic), flammable liquids (which are liquids that ignite easily), and radioactive substances (which involve radiation hazards). So the label that fits these substances best is toxic gases, signaling the inhalation toxicity as the main danger and guiding the appropriate protective measures.

Poisonous gases are categorized by toxicity, not by flammability or radioactivity. Chlorine and phosgene are gases that cause serious health effects if inhaled, even in small amounts, so their primary hazard is toxic inhalation risk. That’s why they are placed in the toxic gases group within the gases category. This differs from non-flammable gases (which are not toxic), flammable liquids (which are liquids that ignite easily), and radioactive substances (which involve radiation hazards). So the label that fits these substances best is toxic gases, signaling the inhalation toxicity as the main danger and guiding the appropriate protective measures.