# Lysine hydrochloride

**CAS:** 657-27-2  
**PubChem CID:** [69568](https://pubchem.ncbi.nlm.nih.gov/compound/69568)  
**Molecular formula:** C₆H₁₅ClN₂O₂  
**Molar mass:** 182.65 g/mol  
**IUPAC:** (2S)-2,6-diaminohexanoic acid;hydrochloride  
**SMILES:** `C(CCN)C[C@@H](C(=O)O)N.Cl`  
**InChIKey:** `BVHLGVCQOALMSV-JEDNCBNOSA-N`  
**InChI:** `InChI=1S/C6H14N2O2.ClH/c7-4-2-1-3-5(8)6(9)10;/h5H,1-4,7-8H2,(H,9,10);1H/t5-;/m0./s1`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 89.3 Ų |
| Hydrogen bond donors | 4 |
| Hydrogen bond acceptors | 4 |
| Rotatable bonds | 5 |
| Heavy atoms | 11 |

## 3D structure

The molecule contains 26 atoms connected by 24 chemical bonds. Interactive 3D model available at: https://molgod.org/molekula/657-27-2/

## Synonyms

- L-Lysine hydrochloride
- 657-27-2
- L-Lysine monohydrochloride
- lysine hydrochloride
- L-Lysine, monohydrochloride
- L-(+)-Lysine Monohydrochloride
- Lysine hcl, l-
- JNJ23Q2COM
- Lysine, l-, monohydrochloride
- NSC-9253

## Available in the shop

[Pharmaceutical Grade L-Lysine Hydrochloride (CAS 657-27-2) — Xilong Scientific](https://molgod.org/sds-cards/pharmaceutical-grade-l-lysine-hydrochloride-cas-no-657-27-cas-657-27-2-xilong-scientific/)

## Data sources

- [PubChem CID 69568](https://pubchem.ncbi.nlm.nih.gov/compound/69568)
- [Wikidata](https://www.wikidata.org/wiki/Q27124123)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=657-27-2)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=657-27-2)

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*Last updated: 2026-09-02 · Generator: MOL-GOD v3.12.33*