2-Chloro-9,9'-spirobi[fluorene] CAS 1995886-78-6
| CAS No. | 1995886-78-6 |
| Molecular Formula | C25H15Cl |
| Molecular Weight | 350.84 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Chloro-9,9'-spirobi[fluorene] (CAS 1995886-78-6), molecular formula C25H15Cl and molecular weight 350.84 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Chloro-9,9'-spirobi[fluorene] (C25H15Cl) contains chlorine 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 350.84 g/mol, it falls into the moderately-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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C25H15Cl |
| Molecular Weight | 350.84 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- Benzyl 3-((2-chloro-N-cyclopropylacetamido)methyl)pyrrolidine-1-carboxylate (CAS 1353946-65-2)
- 2-{[(2-Chloro-acetyl)-isopropyl-amino]-methyl}-pyrrolidine-1-carboxylic acid benzyl ester (CAS 1353956-20-3)
- [(R)-1-(2-Chloro-acetyl)-piperidin-3-yl]-cyclopropyl-carbamic acid benzyl ester (CAS 1353962-54-5)
- Benzyl 2-((2-chloro-N-cyclopropylacetamido)methyl)pyrrolidine-1-carboxylate (CAS 1353963-84-4)
- 3-{[(2-Chloro-acetyl)-cyclopropyl-amino]-methyl}-pyrrolidine-1-carboxylic acid benzyl ester (CAS 1353974-13-6)
- 2-(7-Chloro-5-phenyl-[1,2,4]triazolo[4,3-a]quinolin-1-yl)-N,N-dimethylethan-1-amine (CAS 72882-78-1)
- 4-Chloro-6-methoxy-7-(3-(4-methylpiperazin-1-yl)propoxy)quinazoline (CAS 264208-55-1)
- 4-Chloro-7-methoxy-6-(3-(4-methylpiperazin-1-yl)propoxy)quinazoline (CAS 894426-67-6)
Recommended Standards
- 3-Amino-1-[2-chloro-5-(morpholine-4-sulfonyl)phenyl]thiourea (CAS 885458-84-4)
- 1-(4-Chlorobenzoyl)-5-oxo-N,N-dipropylpyrrolidine-2-carboxamide (CAS 85760-87-8)
- 4-(4-Chlorophenyl)-5-(phenylsulfonyl)thiazol-2-amine (CAS 866143-76-2)
- 1-({6-chloroimidazo[1,2-a]pyridin-3-yl}methyl)-4-phenylpiperidine-4-carbonitrile (CAS 882748-17-6)
- 3-Chloro-N-[(E)-2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]ethenyl]aniline (CAS 303997-77-5)
- Ethyl 6-acetyl-2-oxo-1,2-dihydropyrimidine-5-carboxylate (CAS 62327-96-2)
- 2,4-Dioxo-13-Crown-4 (CAS 58484-44-9)
- N-[2-(chloromethyl)-4-nitrophenyl]acetamide (CAS 1171021-29-6)
- 2-(Chloromethyl)benzo[d]oxazole-4-sulfonamide (CAS 1806326-76-0)
- Sodium 1,3-thiazole-4-carboxylate (CAS 1235440-96-6)
- 2-(3-Fluorophenyl)pyrimidin-4-amine (CAS 1215073-22-5)
- 2-(Difluoromethyl)-4,6-difluoro-3-methoxypyridine (CAS 1805323-59-4)
- Benzylpenicillin Impurity 56 (CAS CATO-C4X-189956)
- Integrin Binding Peptide trifluoroacetate salt (CAS 278792-07-7)
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