Chlorine dioxide, hydrate, frozen

Chlorine dioxide is a chemical compound with the formula ClO2 that exists as yellowish-green gas above 11 °C, a reddish-brown liquid between −59 °C and 11 °C, and as bright orange crystals when colder. It is an oxidizing agent, able to transfer oxygen to a variety of substrates, while gaining one or more electrons via oxidation-reduction (redox). It does not hydrolyze when it enters water, and is usually handled as a dissolved gas in solution in water. Potential hazards with chlorine dioxide include health concerns, explosiveness and fire ignition. Wikipedia

Substance Data

Source: TOXNET



Flash Point


Boiling Point


Emergency Response Guide No. !

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

(3) Hazard Class


(4) Identification number Help

NA 9191

(5) Packing Group Help


(6) Labels Help

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

(1) Symbols Help

This entry is signed with "D". The letter "D" identifies proper shipping names which are appropriate for describing materials for domestic transportation but may be inappropriate for international transportation under the provisions of international regulations (e.g., IMO, ICAO). An alternate proper shipping name may be selected when either domestic or international transportation is involved.

(7) Special Provisions (§172.102) Help

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

(8A) ExceptionsNone
(8B) Non-bulk229see 49 CFR §173.229
(8C) BulkNone

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(10A) Location
(10B) Other n/a

Segregation Chart for Load, Transport, Storage

In this table a statement is contained for each hazard class whether the loading, transport or storage with other hazard classes is allowed, is not permitted or is restricted. The table is based on U.S.-Code 49 CFR §177.848.

red May not be loaded, transported, or stored together in the same transport vehicle or storage facility.
green Load, transport, storage together is not restricted.
yellow Load, transport, storage together is allowed under restrictions.