Liquid sulfur in open containers may be extinguished with a fine spray of water. Use of high pressure hose streams must be avoided because of the risk of splattering or causing a steam explosion. Keep quantity of water used to a minimum. Fires in storage tanks can be extinguished by shutting off vents to exclude air. Allow tank contents to cool to below 310 F before opening again.
Molten sulfur can release hydrogen sulfide, a highly toxic gas.
Iron oxide fume is spontaneously combustible and burns with a nearly invisible flame. Evacuate area of all unnecessary personnel. Keep all ignition sources from spill. Uncontaminated material may be reused. Keep any liquid from entering sewers, watercourses, or low-lying areas.