... shaped crystal 5-Nitrosalicylaldehyde 97-51-8Cas No.:108-62-3M.F.: C8H16O4 white needle--shaped crystal Name MetaldehydeSynonyms ... tetramer; 2,4,6,8-Tetramethyl-1,3,5,7-tetraoxacyclooctane; Metacetaldehyde Molecular Structure Molecular Formula C8H16O4Molecular Weight 176 ... .21CAS Registry Number 108-62-3EINECS 203-600-2 Properties Density 1.27Sublimation 112 ...