Tuesday, June 7, 2011

Isothiazolin

Isothiazolin is an organic heterocyclic compound from the azole class, which contains a five-membered aromatic ring composing of three carbon atoms, one nitrogen atom, and one sulfur atom. Its official IUPAC name is 1,2-thiazol-3-one, and is also called isothiazolinone, isothiazolin-3-one, and 3(2H)-
isothiazolone. Isothiazolin has a molecular mass of 101.13 g/mol. Its derivatives are used as biocides including methylisothiazolinone, chloromethylisothiazolinone, benzisothiazolinone, octylisothiazolinone,
and dichlorooctylisothiazolinone.

Isothiazolins are used for water systems, fuel tanks, oil extraction systems, wood preservation, and antifouling processes as antimicrobial agents. It is non-oxidizing and commonly used in 1.5 percent formulation – an excellent broad-spectrum microbiocide over a wide range of pH level in cooling water
and closed-loop systems. It is non-foaming and is compatible with halogen biocides.

Isothiazolin is usually shot-fed directly from the shipping container at a minimum of 150 ppm. Specific treatment control levels are dependent on a system’s conditions. Tanks, pumps, pipings, and valves to be treated should be made of stainless steel, polyethylene, or PVC to avoid galvanic corrosion, as isothiazolin contains a small amount of copper. To ensure efficiency, oxidizers like sodium hypochlorite should also be applied to the water system alternately with isothiazolin.

Bacterial development in water systems should be monitored as well. The maximum limit of bacterial count should only reach 10,000 or less. To determine microorganism count objectively and quantitatively, dipslide technique should be done. Dip the slides in water for five seconds and wait for
24 hours to observe. Appearance of red dotes on the slides is indicative of bacterial colony presence. After treatment of the system, a chlorine test will now validate if treatment is successful or not.

Isothiazolin products are available at QualiChem Technologies. Acticide WP is developed to protect water systems against microorganisms, and contains unique non-metal salts stabilizing system. Product is free from organic solvents and formaldehyde. Acticide GA-W contains 5% bronopol, specifically
designed for SRB control and protection against bacterial and fungal spoilage. Product is free from organic solvents as well. Both are available in 55 gallons and are ready to be delivered.

References:

Ezine - http://ezinearticles.com/?Isothiazolin-Uses-For-Controlling-Bacteria-and-Legionella-in-Cooling-
Water-Systems&id=3793167

Wikipedia - http://en.wikipedia.org/wiki/Isothiazolinone

1 comment:

  1. Hi Dude,

    The benefits of Isothiazolin is an excellent broad spectrum microbiocide. This is effective over the range of pH's found in typical cooling systems. It does not adversely affect cooling water treatment components. It is non-foaming and compatible with halogen biocides. Thanks for sharing it.....

    Biofouling

    ReplyDelete