---
kind: "section"
citation: "49 C.F.R. § 172.521"
title: "49"
number: "172.521"
heading: "DANGEROUS placard."
url: "https://uscodex.org/cfr/49/172.521"
---

# §172.521. DANGEROUS placard.

- (a) Except for size and color, the DANGEROUS placard must be as follows:
- (b) In addition to meeting the requirements of [§ 172.519](/cfr/49/172.519.md), 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.

## Notes

### Amendments

[Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, as amended by Amdt. 172-29A, 41 FR 40680, Sept. 20, 1976]

### Authority

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and 1.97.

### Source

Source: Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, unless otherwise noted.

### Amendments

[Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, as amended by Amdt. 172-29A, 41 FR 40680, Sept. 20, 1976]