HazMat Tool — substance information

Thallium chlorate

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 2573
Hazard class
5.1
Packing group
II
ERG guide
ERG 141
Special provisions
SP IB6, SP IP2, SP T3, SP TP33
Source
49 CFR §172 (15 June 2026)

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Thallium chlorate


Thallium is a chemical element; it has symbol Tl and atomic number 81. It is a silvery-white post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolors when exposed to air. Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production Wikipedia

Emergency Response Guide No. 141

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

5.1
Oxidizers

(4) Identification number Help

UN 2573

(5) Packing Group Help

II

(6) Labels Help

Oxidizers (5.1) Poisonous liquids PG I Zone A (6.1)

(7) Special Provisions (§172.102) Help

×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.
IB6
IP2
T3
TP33

(8) Packing Authorizations (§173.***) Help

(8A) Exceptions152see 49 CFR §173.152
(8B) Non-bulk212see 49 CFR §173.212
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/rail5 kg
(9B) Cargo aircraft only25 kg

(10) Vessel stowage Help

(10A) Location
(10B) Other

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.

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

Similar substances

UN / IDProper shipping nameHazard class
UN 1707Thallium compounds, n.o.s6.1
UN 2727Thallium nitrate6.1