Billing Code - PHMSA - Department of Transportation

identification number (UN3506) for the description “Mercury contained in manufactured
articles,” PHMSA is removing the description that is currently assigned to “UN2809,
Mercury.”
Amendments to the Column (6) label(s).
Section 172.101(g) describes Column (6) of the HMT and the labels required
(primary and subsidiary) for specific entries in the HMT. Data presented to the UN
Committee of Experts on the Transport of Dangerous Goods (UNCOE) in this last
biennium indicated a need for the addition of subsidiary risk of Division 6.1 (toxic) to be
assigned to “UN2809, Mercury” and to the new entry “UN3506, Mercury contained in
manufactured articles.” We note that for air transport, Special provision A191 provides
relief from the labeling and documentation requirements of this new subsidiary risk.
In addition to the changes above, data was also presented to the UNCOE that
indicated the need for a subsidiary risk of Division 6.1 (toxic) to be assigned to UN2381
Dimethyl disulfide.
PHMSA is making appropriate amendments to the HMT to account for these
revisions to the UN Model Regulations.
Amendments to the Column (7) special provisions.
Section 172.101(h) describes Column (7) of the HMT and the § 172.102(c) Special
provisions assigned to specific entries in the HMT. The particular modifications to the
entries in the HMT are discussed below. See Section 172.102 special provisions for a
detailed discussion of the additions, revisions, and deletions to the special provisions
addressed in this final rule.
Several HMT entries are revised to include special provision B120. Special
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