D-Galacturonic acid

D-Galacturonic acid

IUPAC name (2S,3R,4S,5R)-2,3,4,5-Tetrahydroxy-6-oxo-hexanoic acid
Identifiers
CAS number	685-73-4^Y
PubChem	84740
ChemSpider	76444^Y
EC number	211-682-6
ChEBI	CHEBI:47962^Y
Jmol-3D images	Image 1 Image 2
SMILES O=C(O)[C@H]1OC(O)[C@H](O)[C@@H](O)[C@H]1O O=C[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)C(=O)O
InChI InChI=1S/C6H10O7/c7-1-2(8)3(9)4(10)5(11)6(12)13/h1-5,8-11H,(H,12,13)/t2-,3+,4+,5-/m0/s1^Y Key: IAJILQKETJEXLJ-RSJOWCBRSA-N^Y 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 InChI=1/C6H10O7/c7-1-2(8)3(9)4(10)5(11)6(12)13/h1-5,8-11H,(H,12,13)/t2-,3+,4+,5-/m0/s1 Key: IAJILQKETJEXLJ-RSJOWCBRBL
Properties
Molecular formula	C₆H₁₀O₇
Molar mass	194.139
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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.