2,7-Dichloronaphthalene CAS 2198-77-8
| CAS No. | 2198-77-8 |
| Molecular Formula | C10H6Cl2 |
| Molecular Weight | 197.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2,7-Dichloronaphthalene (CAS 2198-77-8), molecular formula C10H6Cl2 and molecular weight 197.06 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2,7-Dichloronaphthalene (C10H6Cl2) contains chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 197.06 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
Physical & Chemical Properties
| Molecular Formula | C10H6Cl2 |
| Molecular Weight | 197.06 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
Related Dichloronaphthalene Standards
- 1,3-Dichloronaphthalene (CAS 2198-75-6)
- 1,6-Dichloronaphthalene (CAS 2050-72-8)
- 1,7-Dichloronaphthalene (CAS 2050-73-9)
- 2,6-Dichloronaphthalene (CAS 2065-70-5)
- 1,4-Dichloronaphthalene (CAS 1825-31-6)
- 1,5-Dichloronaphthalene (CAS 1825-30-5)
- 1,2-Dichloronaphthalene (CAS 2050-69-3)
- 1,8-Dichloronaphthalene (CAS 2050-74-0)
Recommended Standards
- 2-Chlorocyclohexyl carbonochloridate (CAS 85661-27-4)
- 2,6-Dichloro-4-fluorobenzenethiol (CAS 38366-83-5)
- 2-Isobutylmalonyl dichloride (CAS 75956-48-8)
- 3-Methyladipoyl Chloride (CAS 44987-62-4)
- 1-(5,6-Dimethylbenzo[d]thiazol-2-yl)azetidine-3-carboxylic acid (CAS 1283108-11-1)
- 3-[(2-methylbutan-2-yl)amino]propanenitrile (CAS 244190-07-6)
- (2-Chloro-3-(difluoromethyl)-6-methoxypyridin-4-yl)methanol (CAS 1806874-05-4)
- (S)-2-amino-N,3-dimethyl-N-(2-methylbenzyl)butanamide (CAS 1307149-53-6)
- Palbociclib Impurity 60 (CAS 28564-83-2)
- tert-Butyl 5-bromo-2-fluorobenzyl(methyl)carbamate (CAS 1704069-58-8)
- Chlorodihydrido[bis(2-di-i-propylphosphinoethyl)amine]iridium(III) (CAS 791629-96-4)
- (R)-1-(m-tolyl)but-3-en-1-amine (CAS 1270172-69-4)
- 5-(Chloromethyl)bicyclo[2.2.1]Hept-2-ene (CAS 95-09-0)
- Semaglutide impurity 331 (CAS CATO-C4X-2226231)
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