Special provision 549
ADR 2025 — special provision (SP) 549, Chapter 3.3.
Chlorosilanes having a flashpoint of less than 23 °C and which, in contact with water, do not emit flammable gases are substances of Class 3. Chlorosilanes having a flashpoint equal to or greater than 23 °C and which, in contact with water, do not emit flammable gases are substances of Class 8.