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Properties of substance:

α-lactose

Group of substances:

organic

Physical appearance:

white powder

Empirical formula (Hill's system for organic substances):

C12H22O11

Molar/atomic mass: 342.296

Melting point (°C):

222.8

Solubility (g/100 g of solvent):

chloroform: insoluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: 0.09 (20°C) [Ref.]
pyridine: 2.23 (26°C) [Ref.]
quinoline: 1.97 (20°C) [Ref.]
water: 5.22 (20°C) [Ref.]

Properties of solutions:

10% (wt.), solvent - water
  Dynamic viscosity (mPa·s) = 1.37 (20°)
  Density (g/cm3) = 1.039 (20°)
  Index of refraction = 1.3484 (20°)

Numerical data:

Sweetness potency сompared with a 2% (w/v) aqueous solution of sucrose: 0.15

References:

  1. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1237, 1373, 1525 [Russian]
  2. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 798-799 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru