Chemical Properties of Lysine (CAS 56-87-1)


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InChI Key
Molecular Weight1
Other Names
  • (S)-2,6-Diaminohexanoic acid
  • (S)-Lysine
  • (S)-«alpha»,«epsilon»-Diaminocaproic acid
  • 2,6-Diaminohexanoic acid
  • Aminutrin
  • Hexanoic acid, 2,6-diamino-, (S)-
  • L-(+)-Lysine
  • L-H2N(CH2)4CH(NH2)COOH
  • L-Lysine
  • L-Norleucine, 6-amino-
  • Lys
  • Lysine acid
  • Lysine, L-
  • h-Lys-oh
  • «alpha»,«epsilon»-Diaminocaproic acid
  • «alpha»-Lysine

Physical Properties

Property Value Unit Source
PAff 996.00 kJ/mol NIST
BasG 951.00 kJ/mol NIST
Δcsolid -3683.20 ± 1.50 kJ/mol NIST
Δf -135.64 kJ/mol Joback Calculated Property
Δfgas -369.68 kJ/mol Joback Calculated Property
Δfsolid -678.70 ± 1.50 kJ/mol NIST
Δfus 23.85 kJ/mol Joback Calculated Property
Δvap 73.27 kJ/mol Joback Calculated Property
IE 8.60 eV NIST
IE 9.50 eV NIST
logPoct/wat -0.47 Crippen Calculated Property
Pc 4345.39 kPa Joback Calculated Property
Tboil 627.35 K Joback Calculated Property
Tc 821.14 K Joback Calculated Property
Tfus 419.65 K Joback Calculated Property
Vc 0.45 m3/kg-mol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas 327.73 J/mol×K 627.35 Joback Calculated Property

Molecular Descriptors

Joback and Reid Groups
>CH- 1
-CH2- 4
>C=O (nonring) 1
-OH (alcohol) 1
-NH2 2

Similar Compounds

dl-Lysine. L-lysine monohydrochloride. Lysine hydrochloride. DL-Norleucine. Dl-alpha-amino-n-caproic acid. L-Norleucine. N-amylglycine. Octanoic acid, 2-amino-, d,l-. I-amylglycine. norvaline. DL-Norvaline. Ornithine dihydrochloride. 2-Methylbutylglycine. (Beta-cyclopropyl)-alanine. Leucine.

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