L-alanine
The L-enantiomer of alanine. — ChEBI
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Identity & molecular properties
Source-linked values| CAS number | 56-41-7 | ChEBI ↗ |
| Molecular formula | C3H7NO2 | ChEBI ↗ |
| Molar mass | 89.094 g/mol | ChEBI ↗ |
| Monoisotopic mass | 89.04768 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:16977 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 89.09 g/mol | PubChem ↗ |
| Exact mass | 89.047678466 Da | PubChem ↗ |
| Computed XLogP | -3 | PubChem ↗ |
| Topological polar surface area (Ų) | 63.3 | PubChem ↗ |
| H-bond donors | 2 | PubChem ↗ |
| H-bond acceptors | 3 | PubChem ↗ |
| Rotatable bonds | 1 | 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-alanineL-alanineQNAYBMKLOCPYGJ-REOHCLBHSA-NC[C@H](N)C(=O)OInChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m0/s1Classification & 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 89.094 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.