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Preferred IUPAC name Benzene-1,2,3-triol
Other names 1,2,3-Trihydroxybenzene
Pyrogallic acid 1,2,3-Benzenetriol
Identifiers CAS
Number 87-66-1 Y 3D
model (JSmol)...
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Among others,
Braconnot discovered gallic and
ellagic acids (1818) and
pyrogallic acid (pyrogallol)
which later enabled the
development of photography....
- The
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...
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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...
- the
latter in not
being convertible into
gallic acid, and not
yielding pyrogallic acid by dry distillation. It is
precipitated by
sulfuric acid in red flocks...
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pseudo tannins and
their sources are:
Ellagic acid,
gallic acid, and
pyrogallic acid were
first discovered by
chemist Henri Braconnot in 1831.: 20 Julius...
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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...
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reagent used is
phenol (carbolic acid
crystals dissolved in water) or,
pyrogallic acid or, cresol,
usually termed as Pandy's
reagent or Pandy's solution...
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Catechol Ferulic acid
Gallic acid p-Hydroxybenzoic acid Protocatec****c acid
Pyrogallic acid
Resorcylic acid
Sinapinic acid
Syringic acid
Vanillin To transfer...
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including various types of tea, coffee, wine, urine,
tannic acid or
pyrogallic acid,
resulting in
tones varying from
brown to black. Most
toning processes...
