2',7'-Dibromospiro[cyclohexane-1,9'-fluorene] CAS 736138-41-3
| CAS No. | 736138-41-3 |
| Molecular Formula | C18H16Br2 |
| Molecular Weight | 392.13 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 2',7'-Dibromospiro[cyclohexane-1,9'-fluorene] (CAS 736138-41-3), a certified reference material (molecular formula C18H16Br2, MW 392.13 g/mol) for analytical method development and quality control.
Owing to bromine substitution, a polycyclic aromatic system, 2',7'-Dibromospiro[cyclohexane-1,9'-fluorene] is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 392.13 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 2',7'-Dibromospiro[cyclohexane-1,9'-fluorene] meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H16Br2 |
| Molecular Weight | 392.13 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Br-containing |
Related Dibromospiro Standards
- 2',6'-Dibromospiro[cyclohexane-1,9'-fluorene] (CAS 925890-05-7)
- 2,7-Dibromospiro[fluorene-9,4'-piperidine] (CAS 1616113-97-3)
- 2,6-Dibromospiro[cyclopenta[2,1-b:3,4-b']dithiophene-4,2'-[1,3]dioxolane] (CAS 771579-00-1)
- 2',6'-Dibromospiro[cyclopentane-1,9'-fluorene] (CAS 925890-09-1)
- 2',7'-Dibromospiro[cyclopentane-1,9'-fluorene] (CAS 441771-49-9)
- 2’,7’-Dibromospiro[cyclopent[3]ene-1,9’-fluorene] (CAS 951884-04-1)
- 2,7-Dibromospiro[fluorene-9,2'-[1,3]dithiolane] (CAS 113425-39-1)
- 3,6-Dibromospiro[fluorene-9,2'-[1,3]dithiolane] (CAS 1644304-03-9)
Recommended Standards
- Bromhexine Impurity 15 (CAS 2724689-57-8)
- 9,10-Dibromo-2-(tert-butyl)anthracene (CAS 114583-08-3)
- Ambroxol Impurity 16 (CAS CATO-C4X-108516)
- N-(5-iodopyridin-2-yl)-3-(trifluoromethyl)benzamide (CAS 338401-02-8)
- 2-(trifluoromethyl)-5H,6H,7H,8H-imidazo[1,2-a]pyridine-8-carboxylic acid (CAS 1888739-73-8)
- n-((1,2,3-Thiadiazol-4-yl)methyl)-3,5-dichloroaniline (CAS 1156893-88-7)
- 2-Methylquinolin-8-yl 2,5-dimethoxybenzenesulfonate (CAS 332021-80-4)
- Dimethyl 1-allyl-5,5-difluorocyclohexane-1,3-dicarboxylate (CAS 1296114-58-3)
- 4-(2-Mercapto-4,5-dihydro-1H-imidazol-1-yl)benzoic acid (CAS 148720-11-0)
- (1R)-((2S,4R,5R)-5-ethylquinuclidin-2-yl)(quinolin-4-yl)methanamine (CAS 322765-61-7)
- Fmoc-β-Ala-Thr(tBu)-OH (CAS 2171212-96-5)
- 3-Chloro-2-methoxyisonicotinonitrile (CAS 1256833-21-2)
- Bezafibrate EP Impurity E (CAS CATO-C4X-201713)
- [D-Phe22]Semaglutide (CAS CATO-C4X-2226222)
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