Metformin
A member of the class of guanidines that is biguanide the carrying two methyl substituents at position 1. — ChEBI
Safety documents & references
Supplier matching mattersFind the safety document for your specific supplier, product number and grade.
Find a product-specific SDS
Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.
Identity & molecular properties
Source-linked values| CAS number | 657-24-9 | ChEBI ↗ |
| Molecular formula | C4H11N5 | ChEBI ↗ |
| Molar mass | 129.167 g/mol | ChEBI ↗ |
| Monoisotopic mass | 129.10145 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:6801 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 129.16 g/mol | PubChem ↗ |
| Exact mass | 129.10144537 Da | PubChem ↗ |
| Computed XLogP | -1.3 | PubChem ↗ |
| Topological polar surface area (Ų) | 91.5 | PubChem ↗ |
| H-bond donors | 3 | PubChem ↗ |
| H-bond acceptors | 1 | PubChem ↗ |
| Rotatable bonds | 2 | 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 identifiermetforminN,N-dimethyltriimidodicarbonic diamideXZWYZXLIPXDOLR-UHFFFAOYSA-NCN(C)C(=N)NC(=N)NInChI=1S/C4H11N5/c1-9(2)4(7)8-3(5)6/h1-2H3,(H5,5,6,7,8)Names & 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 129.167 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsNCHCalculated 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.