MLI manufactures Tetramethylammonium Hydroxide in our US and China facilities with a patented chlorine-free manufacturing method. We are the only manufacturer producing TMAH via an entirely sealed, fully integrated facility connected directly to a TMAC refinery. By reducing opportunities for contamination, we are able to guarantee metallic impurity levels as low as <1000ppt. TMAH is available at concentrations of choice (in water) up to 25%, and with or without surfactants. Unit packaging is 55gal drum,1000L IBC tote or 1 gal bottle