5-Fluoro-2-mercaptobenzoic acid CAS 120121-07-5
| CAS No. | 120121-07-5 |
| Molecular Formula | C7H11FO2S |
| Molecular Weight | 178.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5-Fluoro-2-mercaptobenzoic acid (CAS 120121-07-5), molecular formula C7H11FO2S and molecular weight 178.22 g/mol, is a CATO reference standard with documented purity and traceability.
5-Fluoro-2-mercaptobenzoic acid (C7H11FO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C7H11FO2S |
| Molecular Weight | 178.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | F-containing |
| Sulfur Atoms | 1 |
Related Fluoro Standards
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- 2-Fluoro-6-(isopropylamino)benzonitrile (CAS 1154686-14-2)
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Recommended Standards
- 4-Fluorophenyl Methyl Sulfone-d4 (CAS 1189981-42-7)
- (R)-Aminofol D3 (CAS 1286597-21-4)
- N-(2,2-difluoroethyl)-1-methylpiperidin-4-amine (CAS 1184221-15-5)
- 1-(2,2-difluoroethyl)-2-ethylpiperazine (CAS 1341879-51-3)
- 1-Fluoro-4-(trans-4-(2-(trans-4-propylcyclohexyl)-ethyl)cyclohexyl)benzene (CAS 91162-04-8)
- 3-Vinylbenzofuran (CAS 63703-24-2)
- 2,4-Dimethyl-1-(4-nitrophenoxy)benzene (CAS 86197-57-1)
- (4-(5-Cyclopropyl-1,3,4-oxadiazol-2-yl)piperidin-1-yl)(phenyl)methanone (CAS 1172387-28-8)
- Methyl 3-(5-methyl-3-phenylisoxazol-4-yl)-3-oxopropanoate (CAS 676348-61-1)
- 4′-Cyclohexylacetophenone (CAS 18594-05-3)
- 1-Benzhydryl-4-((2-fluorophenyl)sulfonyl)piperazine (CAS 667912-10-9)
- 2-(Phenylethynyl)thiophene (CAS 4805-17-8)
- 1-Allyl-N-benzyl-3-methylcyclohexanamine (CAS 137106-92-4)
- Peptide-GMF (CAS CATO-CPTD788469)
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