Potassium amyl xanthate (/pəˈtæsiəm ˌæmɪl ˈzænθeɪt/) is an organosulfur compound with the chemical formula CH3(CH2)4OCS2K.

It is a pale yellow powder with a pungent odor that is soluble in water.

It is widely used in the mining industry for the separation of ores using the flotation process.

As typical for xanthates, potassium amyl xanthate is prepared by reacting n-amyl alcohol with carbon disulfide and potassium hydroxide.

[1] Potassium amyl xanthate is a pale yellow powder.