184720-17-0 2-METHYL-2H-ISOTHIAZOL-3-ONE 2-Methyl-3(2H)-isothiazolone 2-Methyl-4-isothiazolin-3-one 2-Methyl-4-isothiazolin-3-one calcium chloride 26172-54-3 2682-20-4 3(2H)-Isothiazolone, 2-methyl- Caswell No. 572A EINECS 220-239-6 EPA Pesticide Chemical Code 107104 Methylisothiazolinone