HazMat Tool — substance information

Radioactive material, excepted package-instruments or articles

HMT May 2026

UN / ID: UN 2911
Hazard class: 7
Packing group: —
ERG guide: ERG 161
Special provisions: —
Source: 49 CFR §172 (2026/05)

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Radioactive material, excepted package-instruments or articles

Emergency Response Guide No. 161

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

7
Radioactive materials

(4) Identification number

UN 2911

(5) Packing Group

n/a

(6) Labels

None

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(8A) Exceptions	422, 424	see 49 CFR §173.422, 424
(8B) Non-bulk	422, 424	see 49 CFR §173.422, 424
(8C) Bulk	n/a	see 49 CFR §173. n/a

(9) Quantity Limits

(9A) Passenger aircraft/rail	n/a
(9B) Cargo aircraft only	n/a

(10) Vessel stowage

(10A) Location	A Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel. Source: 49 CFR §172.101(k)
(10B) Other	n/a

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

Hazard class	8	7	6.1	5.2	5.1	4.3	4.2	4.1	3	2.3B	2.3A	2.2	2.1	1.6	1.5	1.4	1.3	1.1/1.2
1.1/1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3A
2.3B
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8

	Must not be loaded, transported, or stored together in the same vehicle or facility.
	May be loaded, transported, or stored together.
	May be loaded, transported, or stored together only with restrictions.