HazMat Tool — substance information

Sodium superoxide

HMT May 2026
UN / ID
UN 2547
Hazard class
5.1
Packing group
I
ERG guide
ERG 143
Special provisions
SP A20, SP IB6, SP IP1, SP N34
Source
49 CFR §172 (2026/05)

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Sodium superoxide


Sodium superoxide is the inorganic compound with the formula NaO2. This yellow-orange solid is a salt of the superoxide anion. It is an intermediate in the oxidation of sodium by oxygen. Wikipedia

Emergency Response Guide No. 143

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

5.1
Oxidizers

(4) Identification number Help

UN 2547

(5) Packing Group Help

I

(6) Labels Help

Oxidizers (5.1) Cargo Aircraft Only (Cargo Aircraft Only)

(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.
A20
IB6
IP1
N34

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

(8A) ExceptionsNone
(8B) Non-bulk211see 49 CFR §173.211
(8C) BulkNone

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only15 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.