49 CFR § 173.251 - Bulk packaging for ammonium nitrate emulsion, suspension, or gel.

---
identifier: "/us/cfr/t49/s173.251"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 173.251 - Bulk packaging for ammonium nitrate emulsion, suspension, or gel."
title_number: 49
title_name: "Transportation"
section_number: "173.251"
section_name: "Bulk packaging for ammonium nitrate emulsion, suspension, or gel."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "HAZARDOUS MATERIALS REGULATIONS"
part_number: "173"
part_name: "SHIPPERS—GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS"
positive_law: false
currency: "2026-04-07"
last_updated: "2026-04-07"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and 1.97."
cfr_part: "173"
---


# 173.251 Bulk packaging for ammonium nitrate emulsion, suspension, or gel.

When § 172.101 of this subchapter specifies that a hazardous material be packaged under this section, only the following bulk packagings are authorized, subject to the requirements of subparts A and B of part 173 of this subchapter and the special provisions specified in column 7 of the § 172.101 table.

(a) *IBCs.* IBCs are authorized subject to the conditions and limitations of this section provided:

(1) The IBC type is authorized according to the IBC packaging code for the specific hazardous material in Column (7) of the § 172.101 Table;

(2) The IBC conforms to the requirements in subpart O of part 178 of this subchapter at the Packing Group performance level in Column (5) of the § 172.101 Table for the material being transported.

(b) *Portable tanks.* This section does not apply to “UN3375, Ammonium nitrate emulsion” when transported in IM 101 or 102 portable tanks in accordance with IME Standard 23 (IBR, see § 171.7 of this subchapter).

[80 FR 1161, Jan. 8, 2015, as amended at 89 FR 15665, Mar. 4, 2024]