L-phenylalanine
The L-enantiomer of phenylalanine. — ChEBI
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Identity & molecular properties
Source-linked values| CAS number | 63-91-2 | ChEBI ↗ |
| Molecular formula | C9H11NO2 | ChEBI ↗ |
| Molar mass | 165.192 g/mol | ChEBI ↗ |
| Monoisotopic mass | 165.07898 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:17295 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 165.19 g/mol | PubChem ↗ |
| Exact mass | 165.078978594 Da | PubChem ↗ |
| Computed XLogP | -1.5 | PubChem ↗ |
| Topological polar surface area (Ų) | 63.3 | PubChem ↗ |
| H-bond donors | 2 | PubChem ↗ |
| H-bond acceptors | 3 | PubChem ↗ |
| Rotatable bonds | 3 | PubChem ↗ |
PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.
Names & structural identifiers
Copy any identifierL-phenylalanine(2S)-2-amino-3-phenylpropanoic acidCOLNVLDHVKWLRT-QMMMGPOBSA-NN[C@@H](Cc1ccccc1)C(=O)OInChI=1S/C9H11NO2/c10-8(9(11)12)6-7-4-2-1-3-5-7/h1-5,8H,6,10H2,(H,11,12)/t8-/m0/s1Names & synonyms
Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.
Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.
Mass ↔ amount of substance
Calculated from sourced massUses 165.192 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsCONHCalculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.
Research & patent references
Selected source associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.