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CAS number: 331-39-5
English name: Caffeic acid
Chemical formula: C9H8O4
Molecular weight: 180.15
Alias: 3,4-dihydroxycinnamic acid
Properties: Yellow crystals (water), which turns orange when exposed to lye, which is irritating.
Density (g/mL, 25/4℃): 1.478
Melting point (ºC): 194-198
Boiling point (ºC, normal pressure): 223~225 (dec)
Flash point (ºC): 220
Solubility: soluble in hot water and ethanol, slightly soluble in cold water
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