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refrigerating and air- conditioning industries phenolic board manufacturers
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phenol resorcinol catechol aromatic
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Physical state catecholresorcinolphenol Solidstate Gray fine powderPuffy flakyWhite crystalcolor Phenolic odorodor
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Ignition test
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solubility
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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
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General test 1 drop aniline +dil Hcl +NaNO 2 →Pale yellow color( unstable diazonum salt* ) PHENOLS +10% NaOH
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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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