The tank contained ‘white liquor’, a corrosive substance that consists mainly of sodium hydroxide and sodium sulphide.

A tank of white liquor imploded at the Nippon Dynawave Packaging Company in southern Washington state on Tuesday.

A tank of white liquor imploded at the Nippon Dynawave Packaging Company in southern Washington state on Tuesday.

An implosion at a chemical tank inside a pulp and paper mill in southwestern Washington on Tuesday left one person dead and 9 others missing, according to local authorities and…