9-bromofluorene CAS 1940-57-4
| CAS No. | 1940-57-4 |
| Molecular Formula | C13H21Br |
| Molecular Weight | 257.21 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.
CATO supplies 9-bromofluorene (CAS 1940-57-4), a certified reference material (molecular formula C13H21Br, MW 257.21 g/mol) for analytical method development and quality control.
Owing to bromine substitution, 9-bromofluorene is typically white to off-white low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 257.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C13H21Br |
| Molecular Weight | 257.21 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Br-containing |
Related bromofluorene Standards
Recommended Standards
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- 3-amino-1-phenylbutane-1,4-diol (CAS 1423029-36-0)
- 3-Chloro-6-methoxy-2-methylimidazo[1,2-b]pyridazine (CAS 1935358-12-5)
- 1-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]piperazine dihydrochloride (CAS 1172004-02-2)
- Insulin Degludec Impurity 5 (CAS CATO-C4X-21575)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com