ADR hazard number 25

Hazard identification number 25 on the orange plate: oxidizing (fire-intensifying) gas.

Printed in the upper half of the orange-coloured plate above the UN number, 25 identifies an oxidizing (fire-intensifying) gas.

Digit by digit
2gas given off, either because of pressure or through a chemical reaction
5oxidizing effect: the substance intensifies fire

Note. 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 5 Table A entries

UN 1070 · UN 1072 · UN 2451 · UN 3156 · UN 3157

Source: ADR 2025 (ECE/TRANS/352), Volume II, section 5.3.2.3.2, 25, 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.