HI-0030 (OTTO) 1-Hexyl-3-methylimidazolium hexafluorophosphate, ≥97.0% (HPLC) Cas 304680-35-1 - used as a chelate extraction solvent for divalent metal cations using 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione (thenoyltrifluoroacetone, Htta) as an extractant.