In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Water pollution in sake industry. VI. Treatment of the polluted water discharged at the rice washing by addition of iron, published in 1972, which mentions a compound: 17927-65-0, mainly applied to sake manufacture water pollution; rice washing iron addition, Safety of Aluminum(III) sulfate xhydrate.
Suspended substances (SS) in the polluted water were coagulated by the addition of polyaluminum chloride (PAC) solution and Al2(SO4)3.16-18H2O, or FeCl2.xH2O, or FeSO4.7H2O, or Fe2(SO4)3.xH2O solution FeCl3 was most effective for removal of SS and COD. Addition of <200 ppm Fe3+ resulted in a residue of >10 ppm Fe3+ in the treated water. Successive addition of FeCl3, polyacrylamides (PAA), PAC, and PAA to the polluted water, followed by stirring and pH adjustment at 7.0 resulted in a rapid coagulation and almost all SS and >95% of COD were removed and residual Fe became <0.1 ppm. As far as I know, this compound(17927-65-0)Safety of Aluminum(III) sulfate xhydrate can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com