Abstract: A synergistic antimicrobial composition comprising 4,5-dichloro-2-n-octyl-3-isothiazolone or 2-methyl-3-isothiazolone and ferric dimethyldithiocarbamate, in a ratio to each other which exhibits synergism is disclosed.

Abstract: Nitrosamine-free 3-isothiazolone biocidal compositions suitable for applications where substantial human or animal contact is anticipated, their method of use and process of preparation are disclosed.

Abstract: Process comprising the use as a microbicide or plant growth regulator of a compound of the formula ##STR1## wherein A, B, C and D is each independently selected from the group consisting of O,NR.sup.1, CR.sup.1 R.sup.1, CO, S,SO, and SO.sub.2, except for the A-C, C-A, B-D,D-B combinations: O--O, SO--SO, SO.sub.2 --SO.sub.2, S--O, S--NR.sup.2, SONR.sup.2, SO--CO, SO.sub.2 --CO, SO.sub.2 --SO;each group of the groups R.sup.1 is independently selected from the group consisting of H and (C.sub.1 -C.sub.4)alkyl;Y.sup.1 and Y.sup.2 may each be independently selected from the group consisting of H, (C.sub.1 -C.sub.4)alkyl, halogen, OR,SOR,SO.sub.2 R, SO.sub.3 R, CN, CO.sub.2 R, COR, CF.sub.3, NO.sub.2, NHCOR, and OCOR; or alternatively Y.sup.1 and Y.sup.2 and the carbons to which they are attached may comprise a cyclic structure selected from the group consisting of ##STR2## where R.sup.11 is aryl or (C.sub.1 -C.sub.4)alkylX.sup.1 to X.sup.8 is each independently selected from the group consisting of H, (C.sub.1 -C.

Abstract: Nitrosamine-free 3-isothiazolone biocidal compositions suitable for applications where substantial human or animal contact is anticipated, their method of use and process of preparation are disclosed.

Abstract: This process relates to the halodecarboxylation of 3'-carboxydiphenylether salts using diacyl peroxides, molecular bromine, moderate temperature, an inert atmosphere and atmospheric pressure to afford 2-chloro-4-trifluoromethyl-3'-bromo-4'-nitrodiphenylether.