Vioxanthin is a mycotoxin that was first isolated from the pathogenic fungus Trichophyton violaceum and characterized in 1966.

[1] It is a pigment with a brownish-yellow color.

[1] It has since been found to be a constituent of a variety of other fungi including those in the genus Penicillium[2] and Aspergillus.

[3] The detection of vioxanthin in food products has been used as evidence of contamination with these fungi.

[4] A laboratory synthesis of vioxanthin has been reported.