ADR hazard number 66

Hazard identification number 66 on the orange plate: highly toxic substance.

Printed in the upper half of the orange-coloured plate above the UN number, 66 identifies a highly toxic substance. A repeated figure means that hazard is intensified.

Digit by digit
6toxic, or a risk of infection
6repeated 6: doubling a figure means that hazard (toxic) is intensified

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 109 Table A entries

UN 1544 · UN 1553 · UN 1556 · UN 1557 · UN 1560 · UN 1565 · UN 1570 · UN 1575 · UN 1580 · UN 1583 · UN 1588 · UN 1601 · UN 1602 · UN 1605 · UN 1626 · UN 1647 · UN 1649 · UN 1655 · UN 1670 · UN 1672 and 89 more UN numbers

Source: ADR 2025 (ECE/TRANS/352), Volume II, section 5.3.2.3.2, 66, 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.