Billing Code - PHMSA - Department of Transportation

vapor when transported by vessel. These changes address the safety hazard presented by
shipments of polymeric beads or plastic molding compounds off-gassing flammable vapors
during vessel transport. See Section 176.907 for a detailed discussion of our addition of
these vessel cargo transport requirements.
Section 173.225
Section 173.225 prescribes the packaging requirements and other provisions for
organic peroxides. Packaging requirements for organic peroxides are very specific and
include requirements for the concentration by mass permitted, diluents percentage, water
mass, temperature controls and organic peroxide specific packing methods.
Paragraph (c) of this section contains and describes the organic peroxide table and
how specific organic peroxides are to be transported. In addition, paragraph (e) contains a
separate table that prescribes the packaging requirements for organic peroxides packaged
in IBCs. As self-insulating hazardous materials, organic peroxides can pose different risks
when transported in larger quantities. Thus, a separate table unique to the transport of
these substances in IBCs is contained in the HMR. The “Organic Peroxide IBC Table”
includes maximum quantities permitted to be packaged and any temperature and
emergency controls.
The organic peroxides tables in paragraphs (c) and (e) specify by technical name
those organic peroxides that are authorized for transportation and not subject to the
approval provisions of § 173.128. An organic peroxide identified by technical name is
authorized for transportation only if it conforms to all applicable provisions of these tables.
In this final rule, we are amending the Organic Peroxides Tables in § 173.225 by adding
new entries and revising current entries to account for new organic peroxides and
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