ADR special provision 523
Anhydrous potassium and sodium sulphide (and hydrates < 30 % water) and sodium hydrosulphide (< 25 % water) are Class 4.2.
Class 4.2 covers anhydrous potassium sulphide (UN 1382) and anhydrous sodium sulphide (UN 1385), together with their hydrates holding less than 30 % water of crystallization, and sodium hydrosulphide with less than 25 % water of crystallization (UN 2318).
| Value | Applies when |
|---|---|
| 30 % water of crystallization | less than, UN 1382 and UN 1385 hydrates |
| 25 % water of crystallization | less than, UN 2318 |
Refers to: UN 1382; UN 1385; UN 2318.
Carried by 3 Table A entries
Source: ADR 2025 (ECE/TRANS/352), Volume I, section 3.3.1, special provision 523, page 642.
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.