ADR hazard number X338
Hazard identification number X338 on the orange plate: highly flammable, corrosive liquid that reacts dangerously with water.
Printed in the upper half of the orange-coloured plate above the UN number, X338 identifies a highly flammable, corrosive liquid that reacts dangerously with water. A repeated figure means that hazard is intensified. 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 |
|---|---|
| 3 | flammable liquid (vapours) or gas, or a self-heating liquid |
| 3 | repeated 3: doubling a figure means that hazard (flammable liquid) is intensified |
| 8 | corrosive |
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 11 Table A entries
UN 1162 · UN 1183 · UN 1196 · UN 1242 · UN 1250 · UN 1295 · UN 1298 · UN 1305 · UN 1717 · UN 2985 · UN 2988
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 5.3.2.3.2, X338, page 267.
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.