CYSTEINE HYDROCHLORIDE

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Search structure


Trade Names	CYSTEINE HYDROCHLORIDE ELCYS
Synonyms	Cysteine (as hydrochloride) Cysteine hcl Cysteine hydrochloride Cysteine hydrochloride anhydrous Cysteine hydrochloride monohydrate Elcys L-cysteine L-cysteine ethylester hydrochloride L-cysteine hcl L-cysteine hydrochloride L-cysteine hydrochloride hydrate L-cysteinemethyl hydrochloride NSC-755898 Nouress
Status
Molecule Category	Salt-form
UNII	A9U1687S1S
EPA CompTox	DTXSID0020367

Structure


InChI Key	IFQSXNOEEPCSLW-DKWTVANSSA-N
Smiles	Cl.N[C@@H](CS)C(=O)O
InChI	InChI=1S/C3H7NO2S.ClH/c4-2(1-7)3(5)6;/h2,7H,1,4H2,(H,5,6);1H/t2-;/m0./s1

Physicochemical Descriptors

Property Name	Value
Molecular Formula	C3H8ClNO2S
Molecular Weight	157.62
AlogP	-0.67
Hydrogen Bond Acceptor	3.0
Hydrogen Bond Donor	3.0
Number of Rotational Bond	2.0
Polar Surface Area	63.32
Molecular species	ZWITTERION
Aromatic Rings	0.0
Heavy Atoms	7.0

Cross References

Resources	Reference
ChEBI	91247
ChEMBL	CHEMBL1200630
FDA SRS	A9U1687S1S
Guide to Pharmacology	4782
KEGG	C00097
PDB	CYS
PubChem	23462
SureChEMBL	SCHEMBL18161
ZINC	ZINC00895042

CONTENTS

EcoDrug+ was developed under the PREMIER Innovative Medicines Initiative 2 Joint Undertaking (JU) under grant agreement No 875508. The JU receives support from the EU’s Horizon 2020 research and innovation programme and the European Federation of Pharmaceutical Industries and Associations (EFPIA). The views reflect only the authors’ perspective and the JU is not responsible for any use that may be made of the information EcoDrug+ contains.

Elements of EcoDrug+ were developed under the Biocenter Finland Drug Discovery and Chemical Biology network. CSC-IT Center for Science Ltd is thanked for providing computational resources. Credit is given to Ensembl for collecting species images (provided under public domain licences such as Wikimedia and NHGRI).

Content of EcoDrug+ is provided without guarantee for correctness.

Cite Us:

Ashenafi Legehar, Siobhán Monaghan, Mael Briand, Akseli Niemelä, Leo Ghemtio, Ziaurrehman Tanoli, A Ross Brown, Charles R Tyler, Henri Xhaard, EcoDrug PLUS: an advanced database for drug target conservation analysis and environmental risk assessment, Nucleic Acids Research, 2025, gkaf1251 Read...

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Last update: Monday, 3 November 2025