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Art.No M-035A
Formula C4H5NOS
Conc (% w/w) 0.02% aq
Molality -
MW 115,15
CAS 2682-20-4
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Hapten Information
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2-Methyl-4-isothiazolin-3-one; 2-Methyl-3(2H)-isothiazolone.


This product is no longer available to purchase from Chemotechnique Diagnostics as of 2022-01-01.


This chemical functions as a biocide and preservative within the group of isothiazolinones and is widely used in cosmetics, shampoos, soaps and body care products, cooling fluids, etc. Methylisothiazolinone is typically used in conjunction with methylchloroisothiazolinone. This combination is sold under the trademark of Kathon CG. Use of products using these chemicals can result in eczema-like allergic reactions on areas of product usage. Ceasing product use will usually result in the reaction disappearing. Further research may identify additional product or industrial usages of this chemical.

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