PHMSA

PHMSA — Hazardous Materials Information Center

Ask PHMSA a hazmat-regulations question directly, by phone or email.

PHMSA's information line for questions about the hazardous materials regulations. The phone number and email are on the page.

Use it when you've read the regulation and still have a question. Have the section number in front of you before you call.

For a written answer you can keep on file, request a Letter of Interpretation instead.

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