2-Methyl-4-isothiazolin-3-one hydrochloride26172-54-3100 % similar 2-Methyl-4-isothiazoline-3-one2682-20-487 % similar 2-N-Octyl-4-isothiazolin-3-one26530-20-137 % similar Methylchloroisothiazolinone26172-55-435 % similar 1,2-Dihydro-1-methyl-3,6-pyridazinedione5436-01-131 % similar