A colourless crystalline aromatic compound, C6H2(OH)3COOH; m.p. 253°C. It occurs in wood, oak galls, and tea, and is a component of tannins. It can be made from tannin by acid hydrolysis or fermentation. Gallic acid is used to make ink and various dyes. On heating it yields pyrogallol.
Gallic acid
- Pickering, William Henry (1858–1938)
- picket-fence effect
- picketing
- picking winners
- pickling
- pick list
- pick-up
- pickup
- pick-up ion
- Pick’s theorem
- PIC microcontroller
- pico-
- picocell
- Pico della Mirandola, Giovanni (1463–94)
- picoplankton
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- Picosatellite for Remote-sensing and Innovative Space Missions
- pico-(symbol: p)
- Pico Veleta
- picrate
- picric acid
- picrite
- PICT
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