CFR › Title 49 › Part 172 › §172.55049 CFR §172.550Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Except for size and color, the OXIDIZER placard must be as follows:(b)In addition to complying with § 172.519, the background color on the OXIDIZER placard must be yellow. The symbol, text, division number and inner border must be black.