ADR hazard number 99
Hazard identification number 99 on the orange plate: miscellaneous dangerous substance carried at an elevated temperature.
Printed in the upper half of the orange-coloured plate above the UN number, 99 identifies a miscellaneous dangerous substance carried at an elevated temperature. 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.
| 9 | risk of a spontaneous violent reaction (by the nature of the substance: explosion, disintegration or polymerization with much heat or flammable and/or toxic gases released) |
|---|---|
| 9 | repeated 9: doubling a figure means that hazard (risk of a spontaneous violent reaction) is intensified |
Note. 5.3.2.3.1 lists 99 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 3 Table A entries
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 5.3.2.3.2, 99, page 269.
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.