1.0 2010-04-08 22:06:34 UTC 2025-11-18 22:58:26 UTC FDB005172 Galactomannan Galactomannan, also known as galactomannan type i, is a member of the class of compounds known as oligosaccharides. Oligosaccharides are carbohydrates made up of 3 to 10 monosaccharide units linked to each other through glycosidic bonds. Galactomannan is soluble (in water) and a very weakly acidic compound (based on its pKa). Galactomannan can be found in a number of food items such as arabica coffee, fenugreek, soy bean, and coconut, which makes galactomannan a potential biomarker for the consumption of these food products. In order of increasing number of mannose-to-galactose ratio: fenugreek gum, mannose:galactose ~1:1 guar gum, mannose:galactose ~2:1 tara gum, mannose:galactose ~3:1 locust bean gum or carob gum, mannose:galactose ~4:1 cassia gum, mannose:galactose ~5:1 Galactomannans are often used in food products to increase the viscosity of the water phase . Galactomannoglycan C18H32O16 504.4371 504.169034976 (2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-{[(2R,3S,4R,5S,6R)-4,5,6-trihydroxy-3-{[(2S,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}oxan-2-yl]methoxy}oxane-3,4,5-triol galactomannan OC[C@H]1O[C@H](OC[C@H]2O[C@@H](O)[C@@H](O)[C@@H](O)[C@@H]2O[C@@H]2O[C@H](CO)[C@@H](O)[C@H](O)[C@@H]2O)[C@H](O)[C@@H](O)[C@H]1O InChI=1S/C18H32O16/c19-1-4-7(21)9(23)13(27)17(32-4)30-3-6-15(11(25)12(26)16(29)31-6)34-18-14(28)10(24)8(22)5(2-20)33-18/h4-29H,1-3H2/t4-,5-,6-,7+,8-,9+,10+,11-,12+,13-,14+,15-,16-,17+,18+/m1/s1 OMDQUFIYNPYJFM-XKDAHURESA-N belongs to the class of organic compounds known as oligosaccharides. These are carbohydrates made up of 3 to 10 monosaccharide units linked to each other through glycosidic bonds. Oligosaccharides Organic compounds Organic oxygen compounds Organooxygen compounds Carbohydrates and carbohydrate conjugates Aliphatic heteromonocyclic compounds Acetals Hemiacetals Hydrocarbon derivatives O-glycosyl compounds Oxacyclic compounds Oxanes Polyols Primary alcohols Secondary alcohols Acetal Alcohol Aliphatic heteromonocyclic compound Glycosyl compound Hemiacetal Hydrocarbon derivative O-glycosyl compound Oligosaccharide Organoheterocyclic compound Oxacycle Oxane Polyol Primary alcohol Secondary alcohol D-glucose- and/or D-galactose-substituted mannan logp -2.75 ALOGPS logs -0.03 ALOGPS solubility 4.75e+02 g/l ALOGPS logp -6.5 ChemAxon pka_strongest_acidic 11.22 ChemAxon pka_strongest_basic -3.6 ChemAxon iupac (2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-{[(2R,3S,4R,5S,6R)-4,5,6-trihydroxy-3-{[(2S,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}oxan-2-yl]methoxy}oxane-3,4,5-triol ChemAxon average_mass 504.4371 ChemAxon mono_mass 504.169034976 ChemAxon smiles OC[C@H]1O[C@H](OC[C@H]2O[C@@H](O)[C@@H](O)[C@@H](O)[C@@H]2O[C@@H]2O[C@H](CO)[C@@H](O)[C@H](O)[C@@H]2O)[C@H](O)[C@@H](O)[C@H]1O ChemAxon formula C18H32O16 ChemAxon inchi InChI=1S/C18H32O16/c19-1-4-7(21)9(23)13(27)17(32-4)30-3-6-15(11(25)12(26)16(29)31-6)34-18-14(28)10(24)8(22)5(2-20)33-18/h4-29H,1-3H2/t4-,5-,6-,7+,8-,9+,10+,11-,12+,13-,14+,15-,16-,17+,18+/m1/s1 ChemAxon inchikey OMDQUFIYNPYJFM-XKDAHURESA-N ChemAxon polar_surface_area 268.68 ChemAxon refractivity 100.75 ChemAxon polarizability 46.39 ChemAxon rotatable_bond_count 7 ChemAxon acceptor_count 16 ChemAxon donor_count 11 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 63036 Specdb::MsMs 63037 Specdb::MsMs 63038 Specdb::MsMs 119904 Specdb::MsMs 119905 Specdb::MsMs 119906 Arabica coffee Type 1 specific Coffea arabica 13443 Carob Type 1 specific Ceratonia siliqua 20340 Coconut Type 1 specific Cocos nucifera 13894 1600.0 1600.0 1600.0 mg/100 g Fenugreek Type 1 specific Trigonella foenum-graecum 78534 Soursop Type 1 specific Annona muricata 13337 Soy bean Type 1 specific Glycine max 3847