ALCOHOLS

Aliphatic Aromatic Methanol Ethanol Glycerol Benzyl alcohol

Methanol Ethanol Glycerol Benzyl alcohol Physical properties: State Color Odor Inflammability Change in appearance Change in odor Color imparted to the flame Residue Comment Liquid, mobily, true Liquid, viscous, true Liquid, oily, true Colorless Characteristic odor Butter almond odor Ignition test: Inflammable, luminous, smoky Inflammable, non luminous, non smoky Volatilization No change No change No residue The compounds are aliphatic The compound is aromatic

Acid– base properties: [Solubility or Miscibility] Methanol Ethanol Glycerol Benzyl alcohol H2O L.P. Dil. HCl 10% NaOH Conc. H2SO4 Comment: Miscible in H2O Immiscible No change Immiscible Immiscible Immiscible All the compounds are neutral

Methanol Ethanol Glycerol Benzyl alcohol Preliminary test: Soda lime On cold: On hot: 30% NaOH FeCl3 Conc. H2SO4 Not done (only for solid) No reaction in all No reaction in all Benzyl alcohol + 3-4 drops Conc. H2SO4 (on the wall) Dirty gleatinous white ppt No reaction in all Not done

General test: Oxidation test: Methanol OX. Formaldehyde OX. Formic acid Ethanol OX. Acetaldehyde OX. Acetic acid Benzyl alcohol OX. Benzaldehyde OX. Benzoic acid

Specific test: Iodoform test Alcohol + 10% NaOH + xss I2 No yellow ppt Methanol Ethanol Specific test: Iodoform test Alcohol + 10% NaOH + xss I2 No yellow ppt Yellow ppt

Methanol Ethanol Specific test: 2. Esterification test

IR Location Comment Specific test: 3. Borax test for glycerol Borax + H2O (to dissolve it) + 2 drops ph.ph. + glycerol Disappearance of pink color (( glycerol borate)) very strong acid 4. Conc. H2SO4 test for benzyl alcohol Benzyl alcohol + Conc. H2SO4 Dirty white gelatinous ppt IR Location Comment 3500 – 3200 cm -1 OH functional gp streatching band < 3000 cm -1 CH aliphatic streatching band > 3000 cm -1 CH aromatic streatching band