2,2',7,7'-Tetraiodo-9,9'-spirobi[fluorene] CAS 137181-59-0
| CAS No. | 137181-59-0 |
| Molecular Formula | C25H12I4 |
| Molecular Weight | 819.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2,2',7,7'-Tetraiodo-9,9'-spirobi[fluorene] is closely related to iodine substitution, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 2,2',7,7'-Tetraiodo-9,9'-spirobi[fluorene] (CAS 137181-59-0), a certified reference material (molecular formula C25H12I4, MW 819.98 g/mol) for analytical method development and quality control.
Structurally, 2,2',7,7'-Tetraiodo-9,9'-spirobi[fluorene] (C25H12I4) contains iodine substitution, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 819.98 g/mol, it falls into the high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 2,2',7,7'-Tetraiodo-9,9'-spirobi[fluorene] under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C25H12I4 |
| Molecular Weight | 819.98 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | I-containing |
Related Tetraiodo Standards
- 1,1',3,3'-Tetraiodo-4H,4'H,6H,6'H-5,5'-spirobi[silolo[3,4-c]thiophene] (CAS 138452-52-5)
- 3,3',5,5'-Tetraiodo-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl (CAS 37055-19-9)
- 3,5,3’,5’-Tetraiodo Thyroaldehyde-13C6 (CAS 1346601-51-1)
- 2,4,5,7-TETRAIODO-6-HYDROXY-3-FLUORONE (CAS 142189-38-6)
- 3,3',6,6'-Tetraiodo-2,2',7,7'-tetramethoxy-9,9'-spirobi[fluorene] (CAS 1801236-30-5)
- 4,5,6,7-Tetraiodo-3H-benzo[c][1,2]oxathiol-3-one 1,1-dioxide (CAS 1745-83-1)
- 2,4,5,7-Tetraiodo-3-oxo-9-(2,3,4,5-tetrachlorophenyl)-3H-xanthen-6-yl acetate (CAS 133433-82-6)
- 2,3,4,5-Tetraiodo-1H-pyrrole (CAS 87-58-1)
Recommended Standards
- Avatrombopag Impurity 80 (CAS CATO-C4X-223480)
- Entecavir Impurity 14 (CAS 142217-80-9)
- HIV Gag (129-135 ) (CAS 118071-31-1)
- Entecavir Impurity 34 (CAS 1354695-79-6)
- 2-(3,5-Dimethyl-phenoxy)-propionic acid ethyl ester (CAS 522597-23-5)
- 1-Cyclopropanecarbonyl-2,3-dihydro-1h-indole (CAS 293324-65-9)
- 2-Amino-6-methylbenzyl Alcohol (CAS 65658-16-4)
- Tert-butyl (4-amino-4-thioxobutan-2-yl)carbamate (CAS 159877-49-3)
- 4-(4-Fluorophenyl)piperidin-2-one (CAS 1891169-00-8)
- Ethyl 2-((ethoxycarbonyl)amino)-4-methyl-4H-pyrrolo[3,2-d]thiazole-5-carboxylate (CAS 72083-46-6)
- 6-Amino-3-ethyl-1,2,3,4-tetrahydro-β,2,4-trioxo-1-(phenylmethyl)-5-pyrimidinepropanenitrile (CAS 571149-75-2)
- (2e)-3-(5-Hydroxypyridin-3-yl)prop-2-enoic acid (CAS 340682-24-8)
- Cyanidin 3-O-arabinoside (CAS 792868-19-0)
- Dulaglutide (CAS 923950-08-7)
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