Hazardous Materials Information Center
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Hazmat Info Center




Have a question about transporting hazardous materials? Need clarification on an entry in the Hazardous Materials Regulations? PHMSA's Hazmat Information Center provides live, one-on-one assistance Monday through Friday from 9 a.m. - 5 p.m.

Call the Info Center:

  • for help with use of the Hazardous Materials Regulations (49 CFR Parts 100-185);
  • for information concerning hazardous materials transportation and rulemakings;
  • to report violations of the HMR;
  • to receive recent copies of Federal Register publications or DOT special permits;
  • to request copies of training materials, such as Chart 14 or information packages;
  • to request a formal letter of interpretation*

#HazmatQs on Twitter!

The Hazmat Info Center gets hundreds of calls every week. On Fridays we're Tweeting #HazmatQs - examples of frequently asked questions that provide a glimpse into how everyday citizens and companies safely transport hazmat. Follow @PHMSA_DOT on Twitter and check out #HazmatQs to learn more about common hazmat items you encounter every day!

*To request a formal letter of interpretation or to mail your question, write to:
Mr. Charles E. Betts
Director, Standards and Rulemaking Division
1200 New Jersey Avenue, SE East Building, 2nd Floor
Washington, DC 20590