{"data":{"id":"us/49-cfr-172.521","jurisdiction":"us","citation":"49 CFR 172.521","heading":"DANGEROUS placard.","body":"(a) Except for size and color, the DANGEROUS placard must be as follows:\n(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.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS","Subpart F—Placarding"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"3b6f9db673fab02c2c35d786974dd5c775fbfa82886776c39e171243bd909649","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-172.519","next":"us/49-cfr-172.522"},"notice":"GroundRules: Original legal text. Not legal advice."}