HazMat Tool — substance information

Arsenic trioxide

HMT May 2026
UN / ID
UN 1561
Hazard class
6.1
Packing group
II
ERG guide
ERG 151
Special provisions
SP IB8, SP IP2, SP IP4, SP T3, SP TP33
Source
49 CFR §172 (2026/05)

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Arsenic trioxide


Arsenic trioxide is the inorganic compound with the formula As4O6. As an industrial chemical, its major uses include the manufacture of wood preservatives, pesticides, and glass. For medical purposes, it is sold under the brand name Trisenox among others when used as a medication to treat a type of cancer known as acute promyelocytic leukemia. For this use it is given by injection into a vein. Arsenic trioxide was approved for medical use in the United States in 2000. Wikipedia

Substance Data

Source: PubChem (HSDB, 24.11.2019)

CAS-Number

1327-53-3

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 151

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

6.1
Poisonous Material

(4) Identification number Help

UN 1561

(5) Packing Group Help

II

(6) Labels Help

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.
IB8
IP2
IP4
T3
TP33

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

(8A) Exceptions153see 49 CFR §173.153
(8B) Non-bulk212see 49 CFR §173.212
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/rail25 kg
(9B) Cargo aircraft only100 kg

(10) Vessel stowage Help

(10A) Location
(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.

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

  • §177.834 - General requirements
  • §177.835 - Class 1 materials
  • §177.837 - Class 3 materials
  • §177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
  • §177.839 - Class 8 (corrosive) materials
  • §177.840 - Class 2 (gases) materials
  • §177.841 - Division 6.1 and Division 2.3 materials
  • §177.842 - Class 7 (radioactive) material
  • §177.843 - Contamination of vehicles