Properties

Many physical properties of lactose have been determined (6). These include solubility in water over a wide temperature range, solubility in salt solutions and organic solvents, heat of combustion, heat of solution, heat of dilution, heat capacity, and specific heat. Also determined have been the density, viscosity, refractive index, osmotic pressure, vapor pressure, freezing-point depression, and interfacial tension with organic liquids of lactose solutions and the rate of crystallization of lactose from solution.

Crystalline lactose has adsorptive properties and can be used as a carrier for aromas and flavors (11-15). The chemistry of lactose has been rather extensively examined (1,3), in part because of an interest in converting the rather abundantly available lactose into a more useful product.

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