Liquid formulations of 1,2-benzisothiazolin-3-one

A method of preparing a liquid formulation of 1,2-benzisothiazolin-3-one comprising the steps of:

• (a) combining 1,2-benzisothiazolin-3-one with at least one polyglycol triol having the formula:
• ##STR4## wherein nx, ny and nz are individually selected from the group consisting of 2 and 3, and, when nx, ny and nz are each equal to 2, X+Y+Z has a value equal to or less than about 13.2, and, when nx, ny and nz are each equal to 3, X+Y+Z has a value equal to or less than about 4.45;
• (b) adding NaOH and water to the combination of step (a);
• and
• (c) agitating the combination of step (b) for a period of time sufficient to homogenize the combination;
• wherein the mixture of step (c) contains from about 1 to 25 percent by weight of 1,2-benzisothiazolin-3-one, about 3 to 7 percent by weight of sodium hydroxide, about 20 to 65 percent by weight of the at least one polyglycol triol and about 3 to 63 percent by weight of water.