Molecule
Name
Histidine
IUPAC name
DL-Histidine
Secondary names
2-Amino-3-(1H-imidazol-4-yl)propanoic acid, 2-Amino-3-(1H-imidazol-5-yl)propanoic acid, H-DL-His-OH
InChI
InChI=1/C6H9N3O2/c7-5(6(10)11)1-4-2-8-3-9-4/h2-3,5H,1,7H2,(H,8,9)(H,10,11)
InChI key
HNDVDQJCIGZPNO-UHFFFAOYSA-N
CAS number
4998-57-6
Structure and atomic composition
Formula
$(CNCHNHCH)_{cycl}CH_2CH(NH_2)COOH$
Chemical formula
C6H9N3O2
Structural formula
C1=[CH]([NH][CH]=N1)[CH2][CH](C(=O)[OH])[NH2]
Charge
0
  Atom Name Number
$C$ Carbon 6
$H$ Hydrogen 9
$O$ Oxygen 2
$N$ Nitrogen 3
Relations
  • enantiomer
Isotope mixture type
terrestrial abundance
Spin type
equilibrated
Molar mass
155.15 $g/mol$
State STP
solid
State NTP
solid
Protic
protic
Polarity
polar
Molecule symmetry
unknown
Case
nonlinear-polyatomic
Chemical functions
  Function Number
$R-NH_2$ 1
$R-C(=O)-OH$ 1
$R-(C=CH-NH-CH=N-) cycl$ 1
Chemical bonds
  Bond Number
$\geq C-H$ 5
$-O-H$ 1
$>N-H$ 3
$\geq C-C \leq$ 1
$\eqslantgtr C-C\leq$ 2
$>C=C<$ 1
$\geq C-N<$ 1
$\eqslantgtr C-N<$ 3
$>C=N-$ 1
$>C=O$ 1
$\eqslantgtr C-O-$ 1