Record Information
Creation date2015-10-09 22:30:35 UTC
Update date2017-01-19 02:36:22 UTC
FoodComEx IDPC000411
FoodDB RecordFDB001205
Chemical Information
NameGalactaric acid
DescriptionPresent in ripe fruits of peach and pear. Formed in grapes and grape must by the action of Botrytis cinerea on galacturonic acid Galactaric acid is the dicarboxylic sugar acid resulting from oxidation glactose with dilute nitric acid. It is a substrate of galactarate O-hydroxycinnamoyltransferase [EC]. (KEGG); It forms a crystalline powder which melts at 213 °C. It is insoluble in alcohol, and nearly insoluble in cold water. Due to the symmetry in the molecule, it is optically inactive even though it has chiral carbon atoms (i.e., it is a meso compound). When heated with pyridine to 140 °C, it is converted into allommic acid. When digested with fuming hydrochloric acid for some time it is converted into a 2,5-furandicarboxylic acid (FDCA) while on heating with barium sulfide it is transformed into athiophene carboxylic acid. The ammonium salt yields on dry distillation carbon dioxide, ammonia, pyrrol and other substances. The acid when fused with caustic alkalis yields oxalic acid. Galactaric acid is found in many foods, some of which are alcoholic beverages, fruits, pomes, and peach.
CAS Number526-99-8
(2R,3S,4R,5S)-2,3,4,5-tetrahydroxyhexanedioic acidbiospider
1,2,3,4-Tetrahydroxy-1,4-butanedicarboxylic aciddb_source
Acido galactaricobiospider
Acido mucicobiospider
D-Galactaric acidHMDB
Galactosaccharic aciddb_source
Hexaric acidbiospider
Meso-galactaric acidbiospider
Mucic aciddb_source
Saccharolactic acidChEBI
Tetrahydroxyadipic aciddb_source
Tetrahydroxyhexanedioic acidbiospider
Chemical FormulaC6H10O8
IUPAC name2,3,4,5-tetrahydroxyhexanedioic acid
InChI IdentifierInChI=1S/C6H10O8/c7-1(3(9)5(11)12)2(8)4(10)6(13)14/h1-4,7-10H,(H,11,12)(H,13,14)
Isomeric SMILESOC(C(O)C(O)C(O)=O)C(O)C(O)=O
Average Molecular Weight210.1388
Monoisotopic Molecular Weight210.037567296
Chemical Taxonomy
Description Belongs to the class of organic compounds known as glucuronic acid derivatives. Glucuronic acid derivatives are compounds containing a glucuronic acid moiety (or a derivative), which consists of a glucose moiety with the C6 carbon oxidized to a carboxylic acid.
KingdomOrganic compounds
Super ClassOrganic oxygen compounds
ClassOrganooxygen compounds
Sub ClassCarbohydrates and carbohydrate conjugates
Direct ParentGlucuronic acid derivatives
Alternative Parents
  • Glucuronic acid or derivatives
  • Medium-chain hydroxy acid
  • Medium-chain fatty acid
  • Beta-hydroxy acid
  • Hydroxy fatty acid
  • Monosaccharide
  • Hydroxy acid
  • Dicarboxylic acid or derivatives
  • Alpha-hydroxy acid
  • Fatty acyl
  • Fatty acid
  • Secondary alcohol
  • Polyol
  • Carboxylic acid
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Organic oxide
  • Carbonyl group
  • Alcohol
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available
Physico-Chemical Properties - Experimental
Experimental logPNot Available
Experimental Water Solubility3.3 mg/mL at 14 oCYALKOWSKY,SH & DANNENFELSER,RM (1992)
Melting PointMp 230° dec.DFC
Foods of Origin
FoodContent Range AverageReference
Production Data
Production Methodcommercial
Production Method ReferenceNot Available
Production Method Reference FileNot Available
Quantity AvailableProduction upon request, up to 1 g
Delivery TimeNot Available
Storage Formsolid
Storage Conditions-80°C
StabilityNot Available
PurityNot Available
Spectral Data Upon RequestNot Available
Provider Information
Contact NameContact InstitutionContact Email
Rosa Vazquez
Commercial Vendors
AKSci V1455
MetaSci HMDB0000639
Sigma-Aldrich HMDB0000639
Toronto Research Chemicals G155005