和水混溶，溶于丙酮和苯，微溶于醇。 Sudan red 7B, also known as fat red, is a non-fluorescent stain. It is effectively used to stain lipids and is used to indicate the presence of suberin in cell walls. Sudan red 7B acts as a marker for formosan subterranean termite, Coptotermes fornosanus Shiraki. Sudan Red 7B has been used to stain the fat bodies of Ostrinia nubilalis (Hübner) larvae.