Tetramethyl Ammonium Chloride (TMAC, etramine chloride,75-57-0, Methanaminium) Molecular ... in hybridization solutions of mixed oligonucleotides. In solutions with TMAC, the Tm(melting temperature) of a hybrid is ... dependent on its length, not its base composition. TMAC,Used in probing PCR (polymerase chain reaction) products ... absoluable, airproof Tetramethyl Ammonium Chloride(99%TMAC,75-57-0 )