Under which hazard class do toxic gases fall?

Toxic gases are classified under hazard class 6.1, which is specifically designated for substances that are acutely toxic. This classification indicates that these materials can cause serious health effects or even death if inhaled, ingested, or absorbed through the skin in relatively small quantities. The identification and handling of these hazardous substances are critical in emergency response operations, especially when it comes to protecting responders and the public.

The other classes mentioned do not pertain to toxic gases. Hazard class 4.2 covers substances that are spontaneously combustible, which is unrelated to toxicity. Hazard class 2.3 pertains to poisonous gases but specifically differentiates those that might not have acute toxicity concerns. Hazard class 5.1 is for oxidizers, which can accelerate combustion but are not classified based on their toxic properties. Therefore, understanding the classification system is essential for appropriately managing hazardous materials during emergencies.