Record Information
Creation date2015-05-07 21:31:26 UTC
Update date2020-09-17 15:30:58 UTC
Primary IDFDB031294
Secondary Accession NumbersNot Available
Chemical Information
FooDB Nameβ-D-xylopyranose
DescriptionXylose or wood sugar is an aldopentose, a monosaccharide containing five carbon atoms and an aldehyde functional group. It has chemical formula C5H10O5 and is 40% as sweet as sucrose. It is a white powder with a smoky odor and a smoky, sweet, salty, coffee taste ( The polysaccharide xylan, a hemi-cellulose, consists almost entirely of D-xylose. Xylan is found in 30 % of most plants. Xylose, though, is pervasive as it is found in the embryos of most edible plants. Corncobs, cottonseed hulls, pecan shells, and straw contain considerable amounts of this sugar as well as the plants of apple, apricot, caper, celery, fenugreek and wheat. It is found in apple, banana, grape, guava, orange, raspberry and plum ( Xylose in the urine is a biomarker for the consumption of apples and other fruits. Xylose is also found in mucopolysaccharides of connective tissue. Xylose is the first sugar added to serine or threonine residues during proteoglycan type O-glycosylation. Therefore, xylose is involved in the biosynthetic pathways of most anionic polysaccharides such as heparan sulphate and chondroitin sulphate. In medicine, xylose is used to test for malabsorption by administering a xylose solution to the patient after fasting. If xylose is detected in the blood and/or urine within the next few hours, it has been absorbed by the intestines. Xylose is said to be one of eight sugars which are essential for human nutrition, the others including galactose, glucose, mannose, N-acetylglucosamine, N-acetylgalactosamine, fucose, and sialic acid.
CAS NumberNot Available
Not AvailableNot Available
Predicted Properties
Water Solubility1220 g/LALOGPS
pKa (Strongest Acidic)11.31ChemAxon
pKa (Strongest Basic)-3.5ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count5ChemAxon
Hydrogen Donor Count4ChemAxon
Polar Surface Area90.15 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity29.96 m³·mol⁻¹ChemAxon
Polarizability13.43 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Chemical FormulaC5H10O5
IUPAC name(2R,3R,4S,5R)-oxane-2,3,4,5-tetrol
InChI IdentifierInChI=1S/C5H10O5/c6-2-1-10-5(9)4(8)3(2)7/h2-9H,1H2/t2-,3+,4-,5-/m1/s1
Isomeric SMILESO[C@@H]1CO[C@@H](O)[C@H](O)[C@H]1O
Average Molecular Weight150.1299
Monoisotopic Molecular Weight150.05282343
Description Belongs to the class of organic compounds known as pentoses. These are monosaccharides in which the carbohydrate moiety contains five carbon atoms.
KingdomOrganic compounds
Super ClassOrganic oxygen compounds
ClassOrganooxygen compounds
Sub ClassCarbohydrates and carbohydrate conjugates
Direct ParentPentoses
Alternative Parents
  • Pentose monosaccharide
  • Oxane
  • Secondary alcohol
  • Hemiacetal
  • Oxacycle
  • Organoheterocyclic compound
  • Polyol
  • Hydrocarbon derivative
  • Alcohol
  • Aliphatic heteromonocyclic compound
Molecular FrameworkAliphatic heteromonocyclic compounds
External Descriptors

Biological location:

Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
Physical stateNot Available
Physical DescriptionNot Available
Mass CompositionNot Available
Melting PointNot Available
Boiling PointNot Available
Experimental Water SolubilityNot Available
Experimental logPNot Available
Experimental pKaNot Available
Isoelectric pointNot Available
ChargeNot Available
Optical RotationNot Available
Spectroscopic UV DataNot Available
DensityNot Available
Refractive IndexNot Available
TypeDescriptionSplash KeyView
Predicted GC-MSβ-D-xylopyranose, non-derivatized, Predicted GC-MS Spectrum - 70eV, Positivesplash10-000x-9400000000-f20d1c35a7eeea1609a5Spectrum
TypeDescriptionSplash KeyView
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0ue9-0900000000-4856e933b915ddbb05542017-10-06View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0f89-0900000000-79e8278d7ae6b34a77722017-10-06View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-08os-9100000000-64c106194d5825a11d362017-10-06View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0002-1900000000-988a7d2dad8bc555d5022017-10-06View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-000t-2900000000-31127350481e63c82ff72017-10-06View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9000000000-264c06bc93b8e518bbfb2017-10-06View Spectrum
NMRNot Available
ChemSpider IDNot Available
ChEMBL IDNot Available
KEGG Compound IDNot Available
Pubchem Compound IDNot Available
Pubchem Substance IDNot Available
ChEBI IDNot Available
Phenol-Explorer IDNot Available
DrugBank IDNot Available
HMDB IDNot Available
CRC / DFC (Dictionary of Food Compounds) IDNot Available
EAFUS IDNot Available
Dr. Duke IDNot Available
BIGG IDNot Available
KNApSAcK IDNot Available
HET IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
Flavornet IDNot Available
GoodScent IDNot Available
SuperScent IDNot Available
Wikipedia IDNot Available
Phenol-Explorer Metabolite IDNot Available
Duplicate IDSNot Available
Old DFC IDSNot Available
Associated Foods
FoodContent Range AverageReference
Biological Effects and Interactions
Health Effects / BioactivitiesNot Available
EnzymesNot Available
PathwaysNot Available
MetabolismNot Available
BiosynthesisNot Available
Organoleptic Properties
FlavoursNot Available
MSDSNot Available
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference