Refrigerating and air- conditioning industries phenolic board manufacturers.

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Presentation transcript:

refrigerating and air- conditioning industries phenolic board manufacturers

phenol resorcinol catechol aromatic

Physical state catecholresorcinolphenol Solidstate Gray fine powderPuffy flakyWhite crystalcolor Phenolic odorodor

Ignition test

solubility

catecholresorcinolphenol No reactionPhenolic odor On coldSoda lime Phenolic odorNot doneOn hot No rection On cold30%NaOH On hot Green color and rapidly dark Blue or violet colorOn coldFecl3 Not doneOn hot No recion On coldConc. H2so4 On hot

General test 1 drop aniline +dil Hcl +NaNO 2 →Pale yellow color( unstable diazonum salt* ) PHENOLS +10% NaOH

Phenols + phthaline anhydride + Conc. H2SO4 heat until fussion then pour to beaker containning 10%NaOH to give -pink coclr with phenol due to phenol phthaline indicator. -green fluorescence with resorcinol.* -blue color with catechol due to alizarin indicator formation Specific test

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