Definition of pyrogallic acid. Meaning of pyrogallic acid. Synonyms of pyrogallic acid

Here you will find one or more explanations in English for the word pyrogallic acid. Also in the bottom left of the page several parts of wikipedia pages related to the word pyrogallic acid and, of course, pyrogallic acid synonyms and on the right images related to the word pyrogallic acid.

Definition of pyrogallic acid

pyrogallic acid
Pyrogallol Pyr`o*gal"lol, n. [Pyrogallic + -ol.] (Chem.) A phenol metameric with phloroglucin, obtained by the distillation of gallic acid as a poisonous white crystalline substance having acid properties, and hence called also pyrogallic acid. It is a strong reducer, and is used as a developer in photography and in the production of certain dyes.

Meaning of pyrogallic acid from wikipedia

- reactions as gallotannic acid. It differs however from the latter in not being convertible into gallic acid, and not yielding pyrogallic acid by dry distillation...
- manner first reported by Scheele in 1786: heating gallic acid to induce decarboxylation. Gallic acid is also obtained from tannin. Many alternative routes...
- products. Among others, Braconnot discovered gallic and ellagic acids (1818) and pyrogallic acid (pyrogallol) which later enabled the development of photography...
- first patent for an oxygen scavenger used an alkaline solution of pyrogallic acid in an air-tight vessel. Modern scavenger sachets use a mixture of iron...
- reactions as gallotannic acid. It differs however from the latter in not being convertible into gallic acid, and not yielding pyrogallic acid by dry distillation...
- Regnault was also an avid amateur photographer. He introduced the use of pyrogallic acid as a developing agent, and was one of the first photographers to use...
- examples of pseudo tannins and their sources are: Ellagic acid, gallic acid, and pyrogallic acid were first discovered by chemist Henri Braconnot in 1831...
- unlike those in common use today. An example formula follows. Part A: Pyrogallic acid 96 g, alcohol 1 oz. Part B: Pot****ium bromide 12 g, distilled Water...
- in water. The reagent used is phenol (carbolic acid crystals dissolved in water) or, pyrogallic acid or, cresol, usually termed as Pandy's reagent or...
- Pot****ium hydroxide (caustic potash) for carbon dioxide Pyrogallol (pyrogallic acid) for oxygen Copper(I) chloride (ammoniacal Cuprous chloride) for carbon...