HazMat Tool — substance information

Biological substance, Category B

HMT May 2026

UN / ID: UN 3373
Hazard class: 6.2
Packing group: —
ERG guide: ERG 158
Special provisions: SP A82
Source: 49 CFR §172 (2026/05)

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Biological substance, Category B

Emergency Response Guide No. 158

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

6.2

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

A82	The quantity limits in columns (9A) and (9B) do not apply to human or animal body parts, whole organs or whole bodies known to contain or suspected of containing an infectious substance. Browse special provision A82

(8) Packing Authorizations (§173.***)

(8A) Exceptions	134	see 49 CFR §173.134
(8B) Non-bulk	199	see 49 CFR §173.199
(8C) Bulk	None

(9) Quantity Limits

(9A) Passenger aircraft/rail	4 L or 4 kg
(9B) Cargo aircraft only	4 L or 4 kg

(10) Vessel stowage

(10A) Location

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

40	see 49 CFR §176.84

Source: 49 CFR §176.84

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.