LACTOSE - (63-42-3)


Name: lactose; β-D-galactopyranosyl-(1→4)-D-glucose*; milk sugar
CAS Number: 63-42-3
Chemical Formula: C12H22O11
Molar Mass: 342.29648 g
State of Matter: white solid
Mass Percent: C 42.106 %; H 6.4782 %; O 51.415 % 
Isomers:  sucrose  •  maltose


• organic • ether


• "Both forms of lactose are employed, with the α-form predominating: as a nutrient in preparing modified milk and food for infants and convalescents. In baking mixtures. Pharmaceutic aid (tablet and capsule excipient and diluent). To produce lactic acid fermentation in ensilage and food products. As chromatographic adsorbent in analytical chemistry. In culture media. Therapeutic (veterinary): Added to cow's milk for feeding orphan foals." 1


Double Bonds: 0
Triple Bonds: 0
Sigma Bonds: 46
Pi Bonds: 0
Total: 46
Carboxyl Groups: 0
Hydroxyl Groups: 8
Hybridization: all carbons and oxygens are sp3

For More Information


(1) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 5358.