5-Nitrosalicylaldehyde 97-51-8 Cas No.:108-62-3 M.F.: C8H16O4 white needle--shaped crystal 5-Nitrosalicylaldehyde ... Name MetaldehydeSynonyms Acetaldehyde tetramer; 2,4,6,8-Tetramethyl-1,3,5,7-tetraoxacyclooctane; Metacetaldehyde Molecular Structure Molecular Formula C8H16O4Molecular ... It can be used in artifical rainfall, fireworks and safety match. It is called solid alcohol, too. It is used ...