Synonyms: Isochroman Fomular: C9H10O M.W.: 134.18 Feature: Colorless to yellowish liquid, n20/D 1.543-1.545, d20/4 1.067 Appearance: Colorless to yellowish liquidMoisture: NMT0.2%Assay: NLT98.0% Packing:250kg/NET Plastic Drum [493-05-0] 3,4-dihydro-1h-2-benzopyran 98%