ADR special provision 531
Mixtures flashing below 23 °C with > 55 % nitrocellulose, or ≤ 55 % with > 12.6 % nitrogen, are Class 1 (UN 0340/0342) or 4.1 (UN 2555-2557).
A mixture with a flash-point below 23 °C belongs to Class 1 (UN 0340 or 0342) or Class 4.1 (UN 2555, 2556 or 2557) if it has more than 55 % nitrocellulose of any nitrogen content, or 55 % or less nitrocellulose whose nitrogen content exceeds 12.6 % by dry mass.
| Value | Applies when |
|---|---|
| 23 °C | flash-point below |
| 55 % nitrocellulose | content boundary |
| 12.6 % nitrogen (by dry mass) | above, where nitrocellulose is 55 % or less |
Refers to: UN 0340; UN 0342; UN 2555; UN 2556; UN 2557.
Carried by 4 Table A entries
Source: ADR 2025 (ECE/TRANS/352), Volume I, section 3.3.1, special provision 531, page 643.
Paraphrase in FreightUtils' own words, not the official text. Not yet reviewed.
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