Tetrabutylammonium bis(4-methyl-1,2-benzenedithiolato)nickelate (CAS# 15492-42-9) is a catalyst used in the hydrogen-evolution reaction with trifluoroacetic acid, and as an initiator of the polymerization of phenylacetylene. Tetrabutylammonium bis(4-methyl-1,2-benzenedithiolato)nickelate acts as an electromediator for the activation of hydrogen sulfide and alkyl sulfides to radical cations. Dyes and metabolites.