PnB is mainly used as cleaning agent for heavy contaminant. It can dissolve coupling oil and grease efficiently and make itself suitable for the formula of household and industrial. Partially soluble in water, PnB can solubilize most solvent with the application as follows: ① as household and industrial cleanser, remover of grease and paint, coupling agent and solvent of metal and hard surface cleanser; ② as effective coupling agent and solvent of water-reducing coatings; ③ as effective coagulating agent of water-based emulsion paint; ④ as active solvent of solvent-based paint; ⑤ as chemical intermediate for ester, solvent and plasticizer manufacture.