Which color code on standardized shipping containers indicates flammable solids?

• A. Yellow
• B. Red
• C. Green
• D. Red and White Striped

Answer: (D)

In hazmat labeling, the pattern on a container matters as much as the color. Flammable solids are signaled by a red and white striped marking, which distinguishes them from liquids and other hazard classes. The stripes grab attention and indicate that, even though the material is solid, it can ignite under proper conditions, so it must be handled away from heat, friction, and ignition sources. Plain red would typically point to flammable liquids, yellow to oxidizers/reactives, and green isn’t used to denote flammable solids. So the red-and-white stripes are the clear indicator for flammable solids on shipping containers.