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Record Information
Version1.0
Creation Date2016-09-30 22:48:39 UTC
Update Date2020-06-04 20:22:20 UTC
MCDB ID BMDB0001890
Secondary Accession Numbers
  • BMDB01890
Metabolite Identification
Common NameAcetylcysteine
DescriptionAcetylcysteine, also known as NAC or (R)-mercaptate, belongs to the class of organic compounds known as n-acyl-l-alpha-amino acids. These are n-acylated alpha amino acids which have the L-configuration of the alpha-carbon atom. Acetylcysteine exists as a solid, possibly soluble (in water), and an extremely weak basic (essentially neutral) compound (based on its pKa) molecule. In cattle, acetylcysteine is involved in the metabolic pathway called the cysteine metabolism pathway.
Structure
Thumb
Synonyms
Chemical FormulaC5H9NO3S
Average Molecular Weight163.195
Monoisotopic Molecular Weight163.030313849
IUPAC Name(2R)-2-acetamido-3-sulfanylpropanoic acid
Traditional Nameacetylcysteine
CAS Registry Number616-91-1
SMILES
CC(=O)N[C@@H](CS)C(O)=O
InChI Identifier
InChI=1S/C5H9NO3S/c1-3(7)6-4(2-10)5(8)9/h4,10H,2H2,1H3,(H,6,7)(H,8,9)/t4-/m0/s1
InChI KeyPWKSKIMOESPYIA-BYPYZUCNSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as n-acyl-l-alpha-amino acids. These are n-acylated alpha amino acids which have the L-configuration of the alpha-carbon atom.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassAmino acids, peptides, and analogues
Direct ParentN-acyl-L-alpha-amino acids
Alternative Parents
Substituents
  • N-acyl-l-alpha-amino acid
  • Cysteine or derivatives
  • Acetamide
  • Carboxamide group
  • Secondary carboxylic acid amide
  • Alkylthiol
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Hydrocarbon derivative
  • Organic oxygen compound
  • Organic nitrogen compound
  • Organosulfur compound
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Organopnictogen compound
  • Organic oxide
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point109.5 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP-0.03ALOGPS
logP-0.71ChemAxon
logS-1.5ALOGPS
pKa (Strongest Acidic)3.82ChemAxon
pKa (Strongest Basic)-2ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area66.4 ŲChemAxon
Rotatable Bond Count3ChemAxon
Refractivity37.67 m³·mol⁻¹ChemAxon
Polarizability15.34 ųChemAxon
Number of Rings0ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectra
Concentrations
StatusValueReferenceDetails
Detected but not QuantifiedNot Applicable details
HMDB IDHMDB0001890
DrugBank IDDB06151
Phenol Explorer Compound IDNot Available
FoodDB IDFDB002281
KNApSAcK IDNot Available
Chemspider ID11540
KEGG Compound IDC06809
BioCyc IDCPD-9175
BiGG IDNot Available
Wikipedia LinkAcetylcysteine
METLIN ID784
PubChem Compound12035
PDB IDNot Available
ChEBI ID28939
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Pan L, Yu J, Mi Z, Mo L, Jin H, Yao C, Ren D, Menghe B: A Metabolomics Approach Uncovers Differences between Traditional and Commercial Dairy Products in Buryatia (Russian Federation). Molecules. 2018 Mar 22;23(4). pii: molecules23040735. doi: 10.3390/molecules23040735. [PubMed:29565828 ]