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D-Galacturonic acid

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D-Galacturonic acid
Names
IUPAC name
(2S,3R,4S,5R)-2,3,4,5-Tetrahydroxy-6-oxo-hexanoic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.495 Edit this at Wikidata
EC Number
  • 211-682-6
  • InChI=1/C6H10O7/c7-1-2(8)4(5(10)11)13-6(12)3(1)9/h1-4,6-9,12H,(H,10,11)/t1-,2+,3+,4-,6?/m0/s1
    Key: AEMOLEFTQBMNLQ-YMDCURPLBW
  • O=C(O)[C@H]1OC(O)[C@H](O)[C@@H](O)[C@H]1O
Properties
C6H10O7
Molar mass 194.139
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

D-Galacturonic acid is a sugar acid, an oxidized form of D-galactose. It is the main component of pectin, in which it exists as the polymer polygalacturonic acid. It has an aldehyde group at C1 and a carboxylic acid group at C6. Other oxidized forms of D-galactose are D-galactonic acid (carboxylic group at C1) and meso-galactaric acid (mucic acid) (carboxylic groups at C1 and C6). It is also a uronic acid or hexuronic acid. Naturally occurring uronic acids are D-glucuronic acid, D-galacturonic acid, L-iduronic acid and D-mannuronic acid.

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