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 Hetarylazo disperse dyes derived from 5,6-dichloro- and 6,7-dichloro-2-aminobenzothiazoles, published in 1992, which mentions a compound: 25150-27-0, mainly applied to aminodichlorobenzothiazole azo dye isomer; benzothiazole azo disperse dye polyester, SDS of cas: 25150-27-0.
The isomer mixtures resulting from the diazotization of 5,6-(6,7-)dichloro-2-aminobenzothiazole and coupling to N-substituted anilines were separable by column chromatog. Isomer characterization was effected by unambiguous dye synthesis from the individual dichloro-2-aminobenzothiazoles, and by 1H NMR. The color and dyeing parameters of the isomers on polyester were essentially equivalent, and similar to those of the corresponding isomer mixtures
In addition to the literature in the link below, there is a lot of literature about this compound(6,7-Dichlorobenzo[d]thiazol-2-amine)SDS of cas: 25150-27-0, illustrating the importance and wide applicability of this compound(25150-27-0).
Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem