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Section §172.301: General marking requirements for non-bulk packagings

Below are the available interpretations and guidance for the given section. To return to the list of parts, use the Parts link above. If you do not see any guidance or interpretation information below, that means there is none available for the given part/section. Return to the search page to browse additional regulations sections.

PHMSA has published several Frequently Asked Questions (FAQ) documents on regulatory topics. Please review our FAQ documents below:

Additionally PHMSA has Hazardous Materials FAQs based on letters of interpretation on the following topics:

This section of the website provides the ability to find regulations information including regulations parts, content of sections, and interpretations for regulations sections. Below is a list of parts, identified by the part number and subject. To browse sections by part, click on the subject link below. You will be taken to the eCFR website to view sections for a part.

A written regulatory interpretation, response to a question, or an opinion concerning a pipeline safety issue may be obtained by submitting a written request to the Office of Pipeline Safety (PHP–30), PHMSA, U.S. Department of Transportation, 1200 New Jersey Avenue SE., Washington, DC 20590–0001 or at the email address: In addition to email address, the requestor must include his or her return address and should also include a daytime telephone number. Requests should be submitted at least 120 days before the time the requestor needs a response.

Note: electronic submission is provided as alternative to the 49 CFR Part 190.11(b) mail-in requirement.

The regulations text of the section can be found on the eCFR website. To view the regulations text, use the link below. For assistance, please send an email to

View section 172.301 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
21-0096 Imperative Chemical Partners Shawn Melson View
21-0090 High Precision Gas Mr. Justin Wai View
21-0008 Railsback HazMat Safety Professionals, LLC Rex C. Railsback View
20-0035 Centers for Disease Control and Prevention (CDC) Lori Bane View
19-0106 Woodard & Curran, Inc. Kelly V. Camp View
18-0075 MH Group, LLC Paul Perez View
16-0198 C&J Energy Services Ltd. Mr. George Doggett View
12-0054 DuPont Global Logistics Mr. Kevin M. Greene View
98-0137 Safety Manager Stericycle Mr. Paul B. Hartman View
99-0325 Amrep, Inc. Mr. Darran T. Chase View
99-0064 Avonite, Inc. Mr. Gilbert G. Espinoza View
15-0041 Bombardier (Aerospace) Mr. Jeff Christafore View
98-0307 Rapid Aid Ms. Sally Hamam View
05-0276 Mr. John Stolpe View
03-0076 Yellow Freight System Mr. Robert A. Maberry III View
14-0221 WTS, Inc. Mr. Brian Burns View
09-0187 Infotrac, Inc. Mr. Jason Kob View
10-0185 FedEx Custom Critical Ms. Kellie Toth View
06-0137 Department of the Army Ms. Lauren Oleksyk View
03-0237 The Sherman-Williams Company Ms. Sandra L. Basham View
16-0055 AZKO Nobel Services, Inc. Mr. Mark Connolly View
15-0118 National Association of Fire Equipment Distributors Mr. Norbert Makowka View
07-0213 Hawkins, Inc. Mr. Chris W. Gibson  View
16-0104 Ms. Amanda Hammon View
99-0205 R & L Transfer, Inc. Mr. Randy Russell View
03-0156 AGA Gas, Inc. Mr. Guy Dalton View
10-0127 AT&T Mr. Jim La Porte View
09-0171 Carus Corporation Mr. Chithambarathanu Pillai View
09-0121 Grafco, LLC Ms. Jan Cowles View
14-0228 URS Corporation Mr. Andrew Romach View
04-0015 Jevic Transportation Mr. Samuel V. Yardurnian View
17-0001 MIdway USA Mr. Bradley Spears View
17-0011 Alchem Chemical Company Mr. Johnny Johnson View
10-0062 Air Liquide America Specialty Gases LLC Mr. Ralph Diaz View
04-0184 Lonza, Inc Ms. Felicia L. Lynch View
14-0069 Environmental Management, Inc. Mr. Jamie Newton View
05-0069 Autoliv ASP, Inc. Mr. Dave Madsen View
98-0245 Fluoroware, Inc. Mr. Bany Rauworth View
08-0148 Energy Solutions Mr. James H. Portsmouth View
98-0263 JEVIC Transportation Inc. Mr. Samuel V. Yardumian View
16-0054 Infotrac, Inc. Mr. Jason Kob View
98-0280 Exxon Company, U.S.A. Mr. Robert A. Cashill View
06-0010 Pioneer Eclipse Corporation Ms. Genie G. Bost View