Phosphorous acid is the compound described by the formula H3PO3. This acid is diprotic (readily ionizes two protons), not triprotic as might be suggested by this formula. Phosphorous acid is an intermediate in the preparation of other phosphorus compounds. Organic derivatives of phosphorous acid, compounds with the formula RPO3H2, are called phosphonic acids. Wikipedia
|Emergency Response Guide No. 154|
Data from the Hazardous Materials TableSource: 49 CFR §172 (2018/07)
(3) Hazard Class8
(5) Packing Group
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.
(9) Quantity Limits
(10) Vessel stowage
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.
|May not be loaded, transported, or stored together in the same transport vehicle or storage facility.|
|Load, transport, storage together is not restricted.|
|Load, transport, storage together is allowed under restrictions.|