On July 14, 1995, Takahashi, Shigeaki published a patent.Name: 2-Methylisothiazol-3(2H)-one hydrochloride The title of the patent was High-sensitivity silver halide photographic material. And the patent contained the following:
The material is spectrally sensitized with ≥1 sensitizer which is dispersed in solid fine particles with particle size ≤1 μm and contains ≥1 isothiazolin-3-one compound I (R1 = H, alkyl, alicyclic group, alkenyl, aralkyl, alkoxy, aryl, heterocyclic group, carbamoyl, thiocarbamoyl, sulfamoyl; R2-3 = H, halo, alkyl, alicyclic group, aryl, cyano, alkylthio, arylthio, alkylsulfoxide, alkylsulfonyl, heterocyclic group; R2 and R3 may form benzene ring) between nucleation and chem. sensitization. The material gave stain-free images. The experimental process involved the reaction of 2-Methylisothiazol-3(2H)-one hydrochloride(cas: 26172-54-3).Name: 2-Methylisothiazol-3(2H)-one hydrochloride
The Article related to silver halide photog isothiazolinone sensitizer, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Silver Halide Photographic Chemistry and Processes and other aspects.Name: 2-Methylisothiazol-3(2H)-one hydrochloride
Referemce:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com