BI-0035 (OTTO) 1-Butyl-4-methylpyridinium tetrafluoroborate, ≥97% Cas 343952-33-0 - used in the preparation of the SWNT-polymer composite films to improve the dispersion of SWNTs and conductivity of the composites (SWNT= singlewalled carbon nanotubes). BI-0035 (OTTO) 1-Butyl-4-methylpyridinium tetrafluoroborate, ≥97% Cas 343952-33-0 - used to modify carbon paste electrode, which leads to high sensitivity, selectivity and low detection limit for both potassium ferricyanide and dopamine by cyclic voltammetric technique.