“Attainment OF 2-ALQUILISOTIAZOLINONAS, PURE Preparation OF ITS PURE Formularizations MICROBICIDAS OR ASSOCIATES WITH OTHER MOLECULES MICROBICIDAS and Formularizations MICROBIANAS OR ASSOCIATES WITH OTHER MOLECULES MICROBICIDAS”. The present summary mentions an invention to it related with process for attainment of 2-alquilisotiazolinonas of formulates generality represented for the structure of (1), the pure ones or formulated in changeable ratios where R represents a alquil radical C~ 1~-C~ 8~ and X and X~ 1~ they represent a hydrogen atom (h) or chlorine (C1) on condition that when X~ 1~ is a hydrogen (h), X also is, and when X~ 1~ is a chlorine atom (C1) then X is a hydrogen (h) or chlorine (C1); related 2alquilisotiazolinonas has application as microbicida industrial, using itself for preservation of real estate inks, mineral, cosmetic resins in emulsion, adhesives, loads and water treatment of cooling towers; I also invent it mentions to the preparation of formularizations using these molecules of form stabilized without use of you leave magnesium or leaving of the cloridrato of 2-metilisotiazolinona neutralized with you leave magnesium formulated in set with other molecules that possess microbicida activity. (Structure 1)