Special provision 504
ADR 2025 — special provision (SP) 504, Chapter 3.3.
UN No. 1847 potassium sulphide, hydrated with not less than 30 % water of crystallization, UN No. 1849 sodium sulphide, hydrated with not less than 30 % water of crystallization and UN No. 2949 sodium hydrosulphide hydrated with not less than 25 % water of crystallization are substances of Class 8.