7-Chloro-2-(naphthalen-1-yl)-4H-chromen-4-one CAS 942079-78-9
| CAS No. | 942079-78-9 |
| Molecular Formula | C19H11ClO2 |
| Molecular Weight | 306.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 7-Chloro-2-(naphthalen-1-yl)-4H-chromen-4-one.
7-Chloro-2-(naphthalen-1-yl)-4H-chromen-4-one (CAS 942079-78-9), molecular formula C19H11ClO2 and molecular weight 306.74 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 7-Chloro-2-(naphthalen-1-yl)-4H-chromen-4-one (C19H11ClO2) contains a steroid core, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 14.0, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 306.74 g/mol, it falls into the moderately-high-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.
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 | C19H11ClO2 |
| Molecular Weight | 306.74 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, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- (2E)-3-[5-chloro-1-(3-methoxybenzyl)-3-methyl-1H-pyrazol-4-yl]acrylic acid (CAS 1006492-52-9)
- 4-Chloro-2-[1-(propan-2-yl)-1h-pyrrole-2-amido]benzoic acid (CAS 1155104-43-0)
- Methyl 2-chloro-6-((4-methoxybenzyl)amino)isonicotinate (CAS 1244016-78-1)
- methyl 6-chloro-2-((4-methoxybenzyl)amino)nicotinate (CAS 1356353-33-7)
- Methyl 6-chloro-4-((4-methoxybenzyl)amino)nicotinate (CAS 1706440-18-7)
- 4-Chloro-6-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(1-methoxyethyl)pyrimidine (CAS 1707393-74-5)
- Methyl 2-chloro-4-(3,5-dimethoxyphenyl)benzoate (CAS 1820711-92-9)
- 1-(4-Chloro-1,3-dioxoisoindolin-2-yl)cyclohexanecarboxamide (CAS 51971-67-6)
Recommended Standards
- 5-Chloro-2-(naphthalen-2-yl)-1H-indene-1,3(2H)-dione (CAS 33121-92-5)
- 7-Chloro-2-(naphthalen-2-yl)-4H-chromen-4-one (CAS 942079-77-8)
- 4-(Benzyloxy)-3-chloro-5-ethoxybenzoic acid (CAS 693798-28-6)
- Ethyl 1-benzyl-5-chloro-4-(2-oxoethyl)-1H-pyrazole-3-carboxylate (CAS 2095516-89-3)
- 1-(3-Nitropyridin-2-yl)piperazine hydrochloride (CAS 1185306-94-8)
- ((8-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)methyl)hydrazine (CAS 1094317-77-7)
- 3-Fluoro-4-(trifluoromethyl)-2-pyridinamine (CAS 1227514-27-3)
- (1,3-dioxolane-2-ylmethyl)magnesium bromide solution (CAS 180675-22-3)
- 4-(2-Aminothiazol-4-yl)-2,6-dibromophenol (CAS 874606-50-5)
- 2-Aminothiazol-4-ol (CAS 7146-26-1)
- Tert-butyl 7-fluoro-3,9-diazaspiro[5.5]Undecane-3-carboxylate (CAS 1785633-56-8)
- N-(2-(1H-indol-3-yl)ethyl)-4-chlorobenzenesulfonamide (CAS 50626-41-0)
- 5-fluoro-2-(4-nitro-1H-pyrazol-3-yl)pyridine (CAS 1551297-76-7)
- Glucagon Monohydrochloride (CAS 28270-04-4)
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