StacksVerified U.S. regulatory reference

49 CFR §172.528

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Except for size and color, the NON-FLAMMABLE GAS placard must be as follows:
  2. (b)In addition to complying with § 172.519, the background color on the NON-FLAMMABLE GAS placard must be green. The letters in both words must be at least 38 mm (1.5 inches) high. The symbol, text, class number and inner border must be white.