ADR hazard number X432
Hazard identification number X432 on the orange plate: pyrophoric solid that reacts dangerously with water, giving off flammable gas.
Printed in the upper half of the orange-coloured plate above the UN number, X432 identifies a pyrophoric solid that reacts dangerously with water, giving off flammable gas. The leading X warns that the substance reacts dangerously with water, so water may be applied only with expert approval.
| X | prefix X: the substance reacts dangerously with water; water may be used on it only with the approval of experts |
|---|---|
| 4 | flammable solid, or a self-heating solid |
| 3 | flammable liquid (vapours) or gas, or a self-heating liquid |
| 2 | gas given off, either because of pressure or through a chemical reaction |
Note. In the 5.3.2.3.2 list this entry carries footnote 1: water is not to be used except with the approval of experts. Number and meaning pairing checked against a second text extraction of the list.
Refers to: 5.3.2.3.1; 5.3.2.2.3; Table A column (20).
Carried by 1 Table A entry
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 5.3.2.3.2, X432, page 268.
Paraphrase in FreightUtils' own words, not the official text. Not yet reviewed.
ADR 2027 amendments (accepted, applying from 1 January 2027) are not yet reflected on this page.