2-Methyl-4-isothiazolin-3-one Hydrochloride is an isothiazolinone based biocide and preservative used in personal care products. 2-Methyl-4-isothiazolin-3-one is also used for controlling microbial growth in water-containing solution.Melting Point: >163°C (dec.)Solubility:Chloroform, Methanol