18-Crown Ether-6 Properties Melting Point 42-45 ° C (lit.) Boiling Point 116 ° C0,2mm Density 1175g/cm3 Refractive Index 1.4580 (estimated) Flash Point>230 ° F Storage Conditions Storebelow+30 ° C. Solubility Chloroform (Slightly), Methanol (VerySlightly) Morphology Crystal Crystal MassorLiquid Color Whiteorclearcolors Water Solubility SOLUBLE Sensitivity HygroscopicMerck142602BRN1619616 Stability Stable. Incompatible with strong acids, Strongoxidizingagents. InChIKeyXEZnGIUYQVAUSS-UHFFFAOYSA-NCAS database 17455-13-9 (CASDataBaseReference) NIST chemical information 1,4,7,10,13,16-Hexaoxacyclooctadecane (17455-13-9) EPA chemical information 1,4,7,10,13,16-Hexaoxacyclooctadecane (17455-13-9) 18-crown ether-6 Introduction to uses and synthesis methods 18-crown ether-6, also known as crown ethers, belongs to the macrocyclic ether class organic compounds, The main uses are high-efficiency phase transfer catalysts for fine organic synthesis, complexing agents, and extractants for the separation and extraction of precious metals and rare earth elements. In chemical analysis, it can be used for ion enrichment, separation, and masking, and can also be used as ion conductive materials and materials for making liquid crystal display devices in the fields of medicine, biochemistry, and electronic industry. Chemical properties: 18-crown ether-6 appears as a colorless viscous liquid with boiling points of 115-116 ℃ (240Pa), 93-96 ℃ (18.3Pa), 78 ℃ (6.67Pa), relative density of 1.113 (20/4 ℃), refractive index of 1.4615. 18-Grown-6,1,4,7,10,13,16-Hexaoxacy-looctadecane, white crystalline. Melting point 38-39.5 ℃, boiling point 116 Chemicalbook ℃ (26.6Pa). Crown ether, also known as macrocyclic ether, is a macrocyclic compound containing multiple oxygen atoms. When naming, label the total number of atoms contained in the ring before the word "crown", and label the number of oxygen atoms contained after the name. This was unexpectedly discovered by Pedersen of DuPont in 1967 and found that this type of compound has many abnormal characteristics.