... Product: Perchloroethylene2) Molecular Formula: C2Cl43) Einecs No.: 204-825-9 4) H.S.Code: 290323005) CAS No.:127-18-4 6) Relative Molecular ... /4oC )11) Class of risk: 6.1; Toxic12) U.N. NO.: 189713) Use: Dry Clean, Organic Impregnant, Cleanout , Desulfurize14) Storage Condition ... -1.6251.622ColourHazen, ≤1510Non-volatile matter ,% ≤0.0050.002 Perchloroethylene (CAS NO:127-18-4)