49 CFR 172 Special Provision TP25 (TP-Codes)

These provisions apply to the transportation of hazardous materials in IM and UN Specification portable tanks.
DescriptionSulphur trioxide 99.95% pure and above may be transported in tanks without an inhibitor provided that it is maintained at a temperature equal to or above 32.5 °C (90.5 °F).
HazMat with this Code

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