Description 4-Anisaldehyde (also: p-anisaldehyde, anisic aldehyde, anise aldehyde) is an organic compound that is commonly encountered in fragrances, both synthetic and natural. The compound consists of a benzene ring with an aldehyde and a methoxy group. It is a clear liquid with a strong aroma. Two related isomers, ortho-anisaldehyde and meta-anisaldehyde, are also known but less commonly encountered. It provides sweet, floral and strong aniseed odor. Basic Info Chemical Name Anisic aldehyde Synonyms 4-Methoxybenzaldehyde; Anisaldehyd; AUBEPINE; ANISALDEHYDE; Obepin; Expand CAS No. 123-11-5 Molecular Formula C8H8O2 Molecular Weight 136.14800 PSA 26.30000 LogP 1.50770 Properties Appearance & Physical State Clear to slight yellow liquid Density 1.121 Boiling Point 248-249ºC Melting Point -1ºC Flash Point 116ºC Refractive Index 1.571-1.574 Stability Stable under normal temperatures and pressures. Volatile in steam. Storage Condition Refrigerator Vapor Density 4.7 (vs air) Vapor Pressure 0.0249mmHg at 25°C |