Ingredients --

Isothiazolinone
Methylisothiazolinone
Methylchloroisothiazolinone

Chemical Formula: C₈H₉ClN₂O₂S₂

Synonyms

2-methyl-4-isothiazolin-3-one (MI)
5-chloro-2-methyl-4-isothiazolin-3-one (MCI)
Kathon

Description

Isothiazolinones are a class of broad spectrum biocides used as preservatives in shampoos and many other household and industrial products.

Uses

Isothiazolinones are used in cosmetics and shampoos as a biocide to kill fungus and bacteria. Unlike the preservatives DMDM hydantoin and imidazolidinyl urea also commonly used in these products, isothiazolinones do not release formaldehyde, to which some people are sensitive.

Some people are sensitive to isothiazolinones.

isothiazolinone: InChI=1/C4H4ClNOS.C4H5NOS/c1-6-4(7)2-3(5)8-6;1-5-4(6)2-3-7-5/h2H,1H3;2-3H,1H3

DMDM Hydantoin: InChI=1/C7H12N2O4/c1-7(2)5(12)8(3-10)6(13)9(7)4-11/h10-11H,3-4H2,1-2H3

Imidazolidinyl urea: InChI=1/C11H16N8O8/c20-2-18-4(6(22)16-10(18)26)14-8(24)12-1-13-9(25)15-5-7(23)17-11(27)19(5)3-21/h4-5,20-21H,1-3H2,(H2,12,14,24)(H2,13,15,25)(H,16,22,26)(H,17,23,27)/f/h12-17H

methyl paraben: InChI=1/C8H8O3/c1-11-8(10)6-2-4-7(9)5-3-6/h2-5,9H,1H3

ethyl paraben: InChI=1/C9H10O3/c1-2-12-9(11)7-3-5-8(10)6-4-7/h3-6,10H,2H2,1H3

propyl paraben: InChI=1/C10H12O3/c1-2-7-13-10(12)8-3-5-9(11)6-4-8/h3-6,11H,2,7H2,1H3

butyl paraben: InChI=1/C11H14O3/c1-2-3-8-14-11(13)9-4-6-10(12)7-5-9/h4-7,12H,2-3,8H2,1H3

heptyl paraben: InChI=1/C14H20O3/c1-2-3-4-5-6-11-17-14(16)12-7-9-13(15)10-8-12/h7-10,15H,2-6,11H2,1H3

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By Simon Quellen Field