Grupo Mexico Train Derailment Spills 59,000 Litres of Toxic Chemical in Sonora

Mining & Infrastructure Key Facts —The Spill. A Ferromex train operated by Grupo Mexico derailed in Sonora, releasing roughly 59,000 litres of sodium hydrosulfide. —The Chemical. Sodium hydrosulfide is a toxic industrial compound that can release dangerous hydrogen sulfide gas upon contact with water or acids. —Immediate Response. Local authorities ordered evacuations and shelter-in-place protocols…