Which label would most clearly indicate a gas hazard?

Which label would most clearly indicate a gas hazard?

• A. Label showing a flame
• B. Label showing a water droplet
• C. Label showing a skull and crossbones
• D. Label showing a gas cylinder

Answer: (D)

Gas hazards are signaled most clearly by a label showing a gas cylinder. That image directly represents a container designed to hold gas under pressure, which tells handlers to treat the contents as pressurized and to take appropriate precautions—secure the cylinder upright, use a valve protection cap, keep it away from heat, and maximize ventilation to avoid buildup. Other symbols point to different risks: a flame means flammable, a skull and crossbones indicates toxicity, and a water droplet isn’t a standard warning for gas hazards. The gas cylinder pictogram provides the most direct and unmistakable warning that the material is a gas.

Gas hazards are signaled most clearly by a label showing a gas cylinder. That image directly represents a container designed to hold gas under pressure, which tells handlers to treat the contents as pressurized and to take appropriate precautions—secure the cylinder upright, use a valve protection cap, keep it away from heat, and maximize ventilation to avoid buildup. Other symbols point to different risks: a flame means flammable, a skull and crossbones indicates toxicity, and a water droplet isn’t a standard warning for gas hazards. The gas cylinder pictogram provides the most direct and unmistakable warning that the material is a gas.