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Properties of substance:

l-aspartic acid

Group of substances:

organic

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

C4H7NO4

Structural formula as text:

HOOCCH2CH(NH2)COOH

Molar/atomic mass: 133.103

Melting point (°C):

270

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
water: 0.223 (0°C) [Ref.]
water: 0.422 (20°C) [Ref.]
water: 0.5018 (25°C) [Ref.]
water: 0.845 (40°C) [Ref.]
water: 1.238 (50°C) [Ref.]
water: 2.642 (75°C) [Ref.]

Dissociation:

pKa (1) = 3.9 (25°C, water)
pKa (2) = 10 (25°C, water)

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

-973.3 (s)

LD50 (mg/kg):

6000 (mice, intraperitoneal)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-26
  2. Journal of Chemical Thermodynamics. - 2008. - Vol. 40, No. 5. - pp. 897-900
  3. Kleemann A. Pharmaceutical Substances. - 2000. - pp. 140-141
  4. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 311
  5. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 239-240
  6. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 106-107
  7. Губен И. Методы органической химии. - Т. 4, Вып. 2. - М.-Л.: ГНТИХЛ, 1949. - pp. 910 [Russian]
  8. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 396 [Russian]
  9. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 448-449 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru