Abstract: A composition comprises 5-15 wt % of the potassium salt of 1,2-benzisothiazolin-3-one (K-BIT) calculated as 1,2-benzisothiazolin-3-one (BIT), 2-12 wt % of a nonionic surfactant, and at least 70 wt %. The presence of the nonionic surfactant stabilizes an aqueous solution of the composition at a temperature of ?5° C. A method of stabilizing an aqueous solution comprising 5-15 wt % of the potassium salt of 1,2-benzisothiazolin-3-one (K-BIT) calculated as 1,2-benzisothiazolin-3-one (BIT) and at least 70 wt % water at a temperature of ?5° C., includes the step of incorporating within the aqueous solution an amount of the nonionic surfactant so that the aqueous solution has 2-12 wt % of the nonionic surfactant.

Abstract: Sodium sulfide hydrate is at least partially dehydrated by heating with N-methyl 2-pyrrolidone. 2-Chlorobenzamide is added to the mixture which is heated further. The mixture is cooled and treated with aqueous hydrogen peroxide to give the sodium salt of 1,2-benzisothiazolin-3-one in good yield. Acidification if desired gives rise to the free 1,2-benzisothiazolin-3-one.

Abstract: Sodium sulfide hydrate is at least partially dehydrated by heating with N-methyl 2-pyrrolidone. 2-Chlorobenzamide is added to the mixture which is heated further. The mixture is cooled and treated with aqueous hydrogen peroxide to give the sodium salt of 1,2-benzisothiazolin-3-one in good yield. Acidification if desired gives rise to the free 1,2-benzisothiazolin-3-one.

Abstract: Sodium sulfide hydrate is at least partially dehydrated by heating with N-methyl 2-pyrrolidone. 2-chlorobenzamide is added to the mixture which is heated further. The mixture is cooled and treated with aqueous hydrogen peroxide to give the sodium salt of 1,2-benzoisothiazoline-3-one in good yield. Acidification if desired gives rise to the free 1,2-benzoisothiazoline-3-one.

Abstract: Aqueous solutions of the tetramethylammonium salt of 1,2-benzothiazolone stable below 0° C.

Abstract: Sodium sulfide hydrate is at least partially dehydrated by heating with N-methyl 2-pyrrolidone. 2-chlorobenzamide is added to the mixture which is heated further. The mixture is cooled and treated with aqueous hydrogen peroxide to give the sodium salt of 1,2-benzoisothiazoline-3-one in good yield. Acidification if desired gives rise to the free 1,2-benzoisothiazoline-3-one.

Abstract: Aqueous solutions of the tetramethylammonium salt of 1,2-benzothiazolone stable below 0° C.

Abstract: Aqueous solutions of the tetramethylammonium salt of 1,2-benzisothiazolin-3-one and 2-methylisothiazolin-3-one which are stable even at low temperatures and high concentrations.

Abstract: A continuous process for forming an anthranilic acid which includes treating in a first step a mixture comprising a carbonate salt and an anthranilic acid salt of the formula (I) where R is selected from hydrogen and one or more substituted or unsubstituted hydrocarbon groups, and M is a univalent cation, with an inorganic acid in an aqueous medium to form an aqueous slurry comprising anthranilic acid and inorganic salts. The slurry is filtered to provide a residue comprising part of said anthranilic acid and a filtrate comprising the remainder of said anthranilic acid and said inorganic salts. Further anthranilic acid is extracted from said filtrate with a water-immiscible organic solvent, whereby the further anthranilic acid is separated into an organic phase while the inorganic salts remain in an aqueous phase. The organic phase is contacted with an aqueous alkali to thereby transfer said further anthranilic acid from said organic phase to an aqueous phase as an anthranilic acid salt.

Abstract: This invention is directed to a process of preparing alkyl N-alkylanthranilate, specially Methyl N-methylanthranilate, represented by Formula (I), in a one pot synthesis, using available and cheap commercial chemicals such as Isatoic anhydride, solid sodium hydroxide, dimethyl sulfate and methanol. Purity of the crude product is about 97% and yield 85%.

Abstract: Processes are described for the preparation of thioxanthones (Formula I). A reactant mixture of a 2-chlorothiobenzoyl chloride (Formula II) and an aromatic compound (Formula III) is added to a slurry of a Friedel-Crafts catalyst in an organic Friedel-Crafts solvent.

Abstract: Stable aqueous dispersion of biocidal 1,2-benzisothiazolin-3-one containing a metal salt of an organic acid, preferably potassium formate.

Abstract: Processes are described for the preparation of thioxanthones (Formula I). A reactant mixture of a 2-chlorothiobenzoyl chloride (Formula II) and an aromatic compound (Formula III) is added to a slurry of a Friedel-Crafts catalyst in an organic Friedel-Crafts solvent. Products of the processes may be used for the preparation of a pharmaceutical product for use in the field of psycho-therapeutics, or as activators or sensitizers in the photo-polymerization of ethylenically unsaturated monomers.