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refrigerating and air-conditioning industries

phenolic board manufacturers . refrigerating and air-conditioning industries. phenols. phenol. catechol. resorcinol. aromatic. Physical state. Ignition test. solubility. All soluble in water and they can convert the blue litmus paper to red that means All acids→ acidic by Na 2 CO 3

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refrigerating and air-conditioning industries

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  1. phenolic board manufacturers refrigerating and air-conditioning industries

  2. phenols phenol catechol resorcinol aromatic

  3. Physical state

  4. Ignition test

  5. solubility All soluble in water and they can convert the blue litmus paper to red that means All acids→ acidic by Na2CO3 * all neutral

  6. Preliminary test

  7. General test Azo dye formation test: 1 drop aniline +dilHcl +NaNO2 →Pale yellow color( unstablediazonum salt* ) PHENOLS +10% NaOH Add 2 on 1 gradually phenol and resorcinol will give red orang dye but catechol give dark purple color

  8. Specifictest 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

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