β-D-Glucopyranose, 4-O-β-D-galactopyranosyl-

• Formula: C₁₂H₂₂O₁₁
• Molecular weight: 342.2965
• IUPAC Standard InChI: InChI=1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5+,6+,7-,8-,9-,10+,11-,12-/m0/s1 Copy

  
• IUPAC Standard InChIKey: GUBGYTABKSRVRQ-OXMKDSILSA-N Copy
• CAS Registry Number: 5965-66-2
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Stereoisomers:
  • Cellobiose
  • α-D-Glucopyranose, 4-O-β-D-galactopyranosyl-
  • D-cellobiose
  • Lactose
  • Maltose
• Other names: Lactose, β-; β-Lactose; 4-O-β-D-Galactopyranosyl-β-D-glucopyranose; beta-Lactose; β-D-Lactose; Lactopress
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Reaction thermochemistry data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
• Options:
  • Switch to SI units

Reaction thermochemistry data

Go To: Top, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

 +  =  + 

By formula: C₁₂H₂₂O₁₁ + H₂O = C₆H₁₂O₆ + C₆H₁₂O₆

References

Go To: Top, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Goldberg and Tewari, 1989
Goldberg, R.N.; Tewari, Y.B., A calorimetric and equilibrium investigatino of the hydrolysis of lactose, J. Biol. Chem., 1989, 264, 9897-9900. [all data]

Notes

Go To: Top, Reaction thermochemistry data, References

• Symbols used in this document:
  

  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.