[2][3] Derivatives of telluropyrylium are important in research of infrared dyes.

Because telluropyrylium is a positively charged cation, it takes the solid form as a salt with non-nucleophillic anions like perchlorate, tetrafluoroborate, or hexafluorophosphate.

The shape of the telluropyrylium molecule is not a perfect hexagon, as the bond lengths to the tellurium atom at about 2.068 Å compared to about 1.4 Å for the carbon-carbon bonds.

The whole ring is bent so that it forms a boat shape with an angles of 8.7° on the Te-γ axis.

(This was measured in the crystal structure of tetraphenyl telluropyrylium-pyrylium monomethine fluoroborate.