In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Freezing droplets of aqueous solutions for the cryochemical process, published in 1972, which mentions a compound: 17927-65-0, Name is Aluminum(III) sulfate xhydrate, Molecular Al2H8O13S3, Application In Synthesis of Aluminum(III) sulfate xhydrate.
In the cryochem. process for preparing ceramic oxides, a method was developed for freezing droplets of aqueous salt solutions Injection and freezing are conducted in a 2-phase liquid refrigerant. The droplets rise in the refrigerant. freeze, and float at the top. An aqueous solution of Al2(SO4)3.17H2O was freeze-dried.
In addition to the literature in the link below, there is a lot of literature about this compound(Aluminum(III) sulfate xhydrate)Application In Synthesis of Aluminum(III) sulfate xhydrate, illustrating the importance and wide applicability of this compound(17927-65-0).
Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com