Mefenamic acid
An aminobenzoic acid that is anthranilic acid in which one of the hydrogens attached to the nitrogen is replaced by a 2,3-dimethylphenyl group. Although classed as a non-steroidal anti-inflammatory drug, its anti-inflammatory properties are considered to be minor. It is used to relieve mild to moderate pain, including headaches, dental pain, osteoarthritis and rheumatoid arthritis. — ChEBI
Safety documents & references
1 indexed referencesFind 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 | 61-68-7 | ChEBI ↗ |
| Molecular formula | C15H15NO2 | ChEBI ↗ |
| Molar mass | 241.29 g/mol | ChEBI ↗ |
| Monoisotopic mass | 241.11028 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:6717 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 241.28 g/mol | PubChem ↗ |
| Exact mass | 241.110278721 Da | PubChem ↗ |
| Computed XLogP | 5.1 | PubChem ↗ |
| Topological polar surface area (Ų) | 49.3 | 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 identifiermefenamic acid2-[(2,3-dimethylphenyl)amino]benzoic acidHYYBABOKPJLUIN-UHFFFAOYSA-NCc1cccc(Nc2ccccc2C(=O)O)c1CInChI=1S/C15H15NO2/c1-10-6-5-9-13(11(10)2)16-14-8-4-3-7-12(14)15(17)18/h3-9,16H,1-2H3,(H,17,18)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.
Safety classification · Japan
NITE / Japanese governmentMefenamic acid · 24A6028
| Endpoint | Reported classification |
|---|---|
| Acute toxicity （Oral） | Category 4 |
| Reproductive toxicity | Category 2, Additional category: Effects on or via lactation |
| Specific target organ toxicity - Single exposure | Category 1 (digestive system, blood), Category 2 (nervous system) |
| Specific target organ toxicity - Repeated exposure | Category 1 (kidney, digestive system, blood) |
Selected source-reported endpoints. Other endpoints, rationales and conditions remain in the original classification. Missing or unlisted information does not mean non-hazardous. This is not a global classification or transport decision.
Read the original NITE classificationMass ↔ amount of substance
Calculated from sourced massUses 241.29 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsCOHNCalculated 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.