Which description identifies the non-flammable, non-toxic Class 2 gas placard?

• A. 2.1 Flammable Gas
• B. 2.2 Non-flammable nontoxic Gas
• C. 2.3 Toxic Gas
• D. 2.4 Nonhazardous Gas

Answer: (B)

In Class 2, the placard tells you the type of gas you’re dealing with: whether it’s flammable, non-flammable, or toxic. A non-flammable, non-toxic gas is labeled with the descriptor “Non-flammable gas” and falls under the 2.2 subcategory. That makes the description of the placard for this gas the phrase “Non-flammable, non-toxic gas.”

This is distinct from the flammable gas descriptor, which would warn you of flammability, or the toxic gas descriptor, which warns you of toxicity. There isn’t a standard Class 2 placard description for “Nonhazardous gas,” so that option isn’t valid for Class 2. Even though a 2.2 gas isn’t flammable or toxic, remember it can still pose other hazards, such as asphyxiation in enclosed spaces or pressure-related dangers.