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Molecular Formula C7H6O2, molecular weight of 112.12, also known as o-hydroxybenzaldehyde. Dark red or colorless oily liquid. Amygdalin with odor. -7 ° C melting point, boiling point, 196.5 ° C, the density (20 / 4 ° C) 1.167g/cm3. Micro dissolve in water, soluble in alcohol, ether and benzene. Together with steam volatile. And the role of sulfate was orange, with the metal ions to form colored chelates. Case of ferric chloride solution significantly purple. To be reverted into Salicylaldehyde alcohol. Coumarin mainly for the production, preparation Violet Perfume, also can be used as a fungicide. May phenol and chloroform in sodium hydroxide solution, vegetables Moer-ti Man activity.
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