Organic open-shell molecules have garnered substantial attention in recent years as potential functional materials with vast applications in molecular spintronics, organic batteries, spin filters, memory devices, and organic magnets, etc. Multi-spin molecular systems i.e., di-, tri-or poly-radicals are captivating radical moieties whose ground-state can be manipulated by controlling their intramolecular exchange interactions. However, thermal stability and synthetic difficulty of high-spin radicals have always remained a challenge to obtain these exotic molecules for their processability and device fabrication. A number of persistent radicals including nitronyl nitroxide, imino nitroxide, oxoverdazyl, dithiadiazolyl, nitroxide, phenoxide etc., have been known over the years. Recently, amino(carboxy) radicals are proposed to be thermally stable at room temperature for weeks, by Mahoney et al. Another exceptionally stable radical is the 1,2,4-benzotriazinyl (Blatter's) radical synthesized by Blatter et al. in 1968, which has gained attention since the last few years due to easy synthetic strategies proposed by followed by Constantinides and Kaszyński et al. There are several reports on the applications and magnetic properties of Blatter's radicals so far. The stable thin films of Blatter's radical are created by Cicullo et al. further opening the doors to be utilized in devices. Its stability has been validated by interfacing with gold substrates by Low et al. Very recently, Gallego et al.