Special provision 633
ADR 2025 — special provision (SP) 633, Chapter 3.3.
Packages and small containers containing this substance shall bear the following mark: "Keep away from any source of ignition". This mark shall be in an official language of the forwarding country, and also, if that language is not English, French or German, in English, French or German, unless any agreements concluded between the countries concerned in the transport operation provide otherwise.