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Properties of substance:

l-asparagine

Group of substances:

organic

Physical appearance:

colorless rhombic crystals

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

C4H8N2O3

Structural formula as text:

H2NCOCH2CH(NH2)COOH

Molar/atomic mass: 132.11

Melting point (°C):

226

Solubility (g/100 g of solvent):

ethanol abs.: 0.02 (20°C) [Ref.]
pyridine: 0.03 (room temperature) [Ref.]
quinoline: 0.11 (20°C) [Ref.]
trichloroethylene: 0.018 (15°C) [Ref.]
water: 2.324 (20°C) [Ref.]
water: 2.5 (25°C) [Ref.]
water: 34.4 (98°C) [Ref.]

Properties of solutions:

2,44% (wt.), solvent - water
  Density (g/cm3) = 1.007 (25°)

Dissociation:

pKa (1) = 8.85 (25°C, water)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-789.4 (s)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-26
  2. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 310
  3. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 261-262
  4. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 112
  5. Губен И. Методы органической химии. - Т. 4, Вып. 2. - М.-Л.: ГНТИХЛ, 1949. - pp. 910 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 403 [Russian]
  7. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1163 [Russian]
  8. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 448-449 [Russian]
  9. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 85 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru