# DANGEROUS placard.

- **operation:** document
- **citation:** 49 CFR 172.521
- **title:** DANGEROUS placard.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** (a) Except for size and color, the DANGEROUS placard must be as follows:

(b) In addition to meeting the requirements of § 172.519, and appendix B to this part, the DANGEROUS placard must have a red upper and lower triangle. The placard center area and 1/2-inch (12.7 mm.) border must be white. The i
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-172-521.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-172-521.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-172-521
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-172.521
**body:**

(a) Except for size and color, the DANGEROUS placard must be as follows:

(b) In addition to meeting the requirements of § 172.519, and appendix B to this part, the DANGEROUS placard must have a red upper and lower triangle. The placard center area and 1/2-inch (12.7 mm.) border must be white. The inscription must be black with the 1/8-inch (3.2 mm.) border marker in the white area at each end of the inscription red.

[Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, as amended by Amdt. 172-29A, 41 FR 40680, Sept. 20, 1976]
- **truncated:** false
- **body characters:** 522