Tetraphenyl butadiene (1,1,4,4-tetraphenyl-1,3-butadiene or TPB) is an organic chemical compound.
T 1529 OTTO 1,1,4,4-Tetraphenyl-1,3-butadiene is used as a wavelength shifter. It is also used as an electroluminescent dye, which glows blue with an electroluminescent dye.