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
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• 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
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• Information on this page:
  • Reaction thermochemistry data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
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Reaction thermochemistry data

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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

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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

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• Symbols used in this document:
  

  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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