Pyrogallic Acid

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Pyrogallol is an organic compound with the formula C6H3(OH)3. It is a white water-soluble solid although samples are typically brownish because of its sensitivity toward oxygen. It is one of three isomeric benzenetriols. Melting point: 133-134 °C , boiling point 309 °C (at normal pressure), and 171.5 °C (at a pressure of 12 mm Hg). It is readily soluble in ether, ethanol, water (40g/100ml at 13 °C) and alkali solutions. Poorly soluble in benzene, chloroform and carbon tetrachloride. Formula C6H6O3 Molar mass 126.111 g/mol CAS Number 87-66-1 Density 1.450 g/cm3 at 20°C (68°F) Purity/Grade ≥99% (ACS Reagent) Appearence Beige crystaline Melting point/freezing point 131.0 – 135.0°C (267.8 – 275.0°F) Initial boiling point and boiling range 309°C (588°F) – lit. Vapour pressure 3 – 5 hPa (2 – 4 mmHg) at 140°C (284°F)


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