Lucifer Yellow CH potassium salt (LY CH potassium salt) is a widely used polar molecular tracer for studying neuronal morphology. The fluorescent molecule contains a carbohydrazide that allow the molecule to be aldehyde-fixable.    &lamba;Ex/&lamba; Em = 428/536 nm  Yellow solid soluble in water  Store at 4°C and protect from light  C13H9K2N5O9S2  MW: 522  [71206-95-6]