All explosive approval applications must be submitted using the Online Application Online Application. Emailed applications will not be accepted after August 31, 2026. Questions/inquiries can still be emailed to explo@dot.gov, or mailed to Department of Transportation, East Building, PHH-24, 1200 New Jersey Avenue SE, Washington, DC 20590.

Apply online at portal.phmsa.dot.gov

The explosive approval request should contain the following:

• Request Letter as described in 49 CFR 107.705.
• Examination and class recommendation report from DOT-Approved Explosive Test Lab or a recognized competent authority of a foreign government.
• A complete summary table for all the explosive compositions contained in the explosive substance or article, the percentages by weight shown and the composition of all mixtures specifically enumerated.
• Engineering drawings in 8.5 X 11 in. format of all the explosive articles with names, product number or drawing numbers that correspond to the class recommendation report.
• Designation of Agent (This applies to foreign manufacturers only). in accordance with 49 CFR 105.40

Requests for confidential treatment must be marked in accordance with 49 CFR 105.30.