CFR › Title 49 › Part 172 › §172.41549 CFR §172.415Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Except for size and color, the NON-FLAMMABLE GAS label must be as follows:(b)In addition to complying with § 172.407, the background color on the NON-FLAMMABLE GAS label must be green.