Isothiazoline (Iso-cide 1.5)

5-chloro-2-methyl-4-isothiazolin-3-one or 2-methyl-4-isothiazolin-3-one

ISO-CIDE 1.5 is a broad spectrum anti-microbial designed specifically for the control of bacterial and fungal slime in cooling towers, pulp and paper mill systems, air washer systems and brewery pasteurizers and water cooling systems. ISO-CIDE 1.5 is a combination of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.

ISO-CIDE 1.5 is not recommended for use in potable water systems or where contamination of potable water can occur.


  • Easy handling in liquid form.
  • Effective at low concentrations.
  • Broad spectrum control of micro-organism in paper mill systems.
  • Resistance to the inhibitory effect of organic and inorganic compounds.

Physical Properties

Specific Gravity 1.02 (+/-0.01)
Bulk Density N/D
Form Liquid
Color Pale green to yellow
Odor Nonspecific
pH 2-5
Solubility Fully miscible
Flash Point(F) None established
Freeze Point(F) -3EC/27EF


Please contact an Representative for additional product information and pricing.