§ 172.555 POISON INHALATION HAZARD placard.
Current through Sep 25, 2026 · Read all of Part 172
(a) Except for size and color, the POISON INHALATION HAZARD placard must be as follows:

(b) In addition to complying with § 172.519, the background on the POISON INHALATION HAZARD placard and the symbol must be white. The background of the upper diamond must be black and the lower point of the upper diamond must be 65 mm (2 5/8 inches) above the horizontal center line. The text, class number, and inner border must be black.
[62 FR 39409, July 22, 1997]
Interpretation letters (3)
- International Shipments from USA to Mexico, Canada, or continued transport via vessel to international destinations and Inhalation Hazard Markings — PHMSA, May 23, 2024
- Marking, Labeling, and Placarding Closed Transport Vehicle Containing Cylinders with Hazard Zone A Hazardous Materials — PHMSA, Oct 28, 2005
- Definition and Packaging Requirements for Poisonous by Inhalation Hazard (PIH) and Combustible Liquids — PHMSA, Sep 27, 2001