2,7-Diiodo-9H-fluorene CAS 16218-28-3
| CAS No. | 16218-28-3 |
| Molecular Formula | C13H8I2 |
| Molecular Weight | 418.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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 supplies 2,7-Diiodo-9H-fluorene (CAS 16218-28-3), a certified reference material (molecular formula C13H8I2, MW 418.01 g/mol) for analytical method development and quality control.
Owing to iodine substitution, an aromatic ring system, 2,7-Diiodo-9H-fluorene is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 418.01 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 | C13H8I2 |
| Molecular Weight | 418.01 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Halogen Content | I-containing |
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- Lifitegrast Impurity 128 (CAS CATO-C4X-2409128)
- Avatrombopag Impurity 73 (CAS CATO-C4X-223473)
- (3-Bromo-2,5-dimethylphenyl)boronic acid (CAS 1259318-83-6)
- Formamide-1-d1 (CAS 35692-88-7)
- (E)-N'-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-N-((2,6-dichlorobenzyl)oxy)formohydrazonamide (CAS 339104-10-8)
- 2-(1-Oxo-1,2-dihydrophthalazin-2-yl)ethanethioamide (CAS 1016860-91-5)
- Semaglutide Impurity 162 (x TFA Salt) (CAS CATO-C4X-2226162)
Why CATO?
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