ADR hazard number 623

Hazard identification number 623 on the orange plate: toxic liquid that gives off flammable gas on contact with water.

Printed in the upper half of the orange-coloured plate above the UN number, 623 identifies a toxic liquid that gives off flammable gas on contact with water. This is one of the figure combinations that 5.3.2.3.1 gives a special meaning, read as a whole rather than figure by figure.

Note. 5.3.2.3.1 lists 623 among the combinations with a special meaning, so read it as a whole from the 5.3.2.3.2 list; the per-figure reading in digits[] does not fully apply. 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 6 Table A entries

UN 3123 · UN 3385 · UN 3386 · UN 3490 · UN 3491