
1) Chelating agent 2) Phenol 3) Pyrogallic acid
Found on
https://www.crosswordclues.com/clue/pyrogallol

• (n.) 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.
Found on
http://thinkexist.com/dictionary/meaning/pyrogallol/

an organic compound belonging to the phenol family, used as a photographic film developer and in the preparation of other chemicals.[3 related articles]
Found on
http://www.britannica.com/eb/a-z/p/137

<chemistry> 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. ... Origin: Pyrogallic + -ol. ... Sourc...
Found on
http://www.encyclo.co.uk/local/20973
Pyr`o·gal'lol noun [
Pyrogallic +
-ol .]
(Chemistry) 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 us...
Found on
http://www.encyclo.co.uk/webster/P/204

[
n] - a toxic white lustrous crystalline phenol used to treat certain skin diseases and as a photographic developer
Found on
http://www.webdictionary.co.uk/definition.php?query=pyrogallol
pyrogallic acid noun a toxic white lustrous crystalline phenol used to treat certain skin diseases and as a photographic developer
Found on
https://www.encyclo.co.uk/local/20974

a white, crystalline, water-soluble, poisonous, solid, phenolic compound, CH(OH), obtained by heating gallic acid and water: used chiefly as a developer in photography, as a mordant for wool, in dyeing, and in medicine in the treatment of certain skin conditions. Also called
Found on
https://www.infoplease.com/dictionary/pyrogallol
No exact match found.