The runaway reaction between tetrachlorobenzene and this compound led to the dioxin release at Seveso. Nearly all asbestos imported to the US today is used for the synthesis of this chemical. The gas line that scrubbed MIC with this compound was fatally turned off at Union Carbide’s Bhopal plant. Red mud is dangerous due to residual levels of this compound. Until the invention of the membrane cell, mercury cells were used in the electrolytic co-synthesis of this compound and (*) chlorine gas. This compound leaches aluminum out of Raney nickel by evolving hydrogen (10[1])gas, and it reacts with alumina in the Bayer process. (10[1])At kraft mills, this compound is mixed with a sulfide to form white liquor. White hygroscopic pellets of this compound are used to make drain cleaner. For 10 points, name this strong base found in lye. ■END■