1-methyl-6-methylidene-8,9-dihydro-7H-naphtho[1,2-g][1]benzofuran-10,11-dione CAS 67656-29-5
| CAS No. | 67656-29-5 |
| Molecular Formula | C18H14O3 |
| Molecular Weight | 278.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1-methyl-6-methylidene-8,9-dihydro-7H-naphtho[1,2-g][1]benzofuran-10,11-dione (CAS 67656-29-5), a certified reference material (molecular formula C18H14O3, MW 278.30 g/mol) for analytical method development and quality control.
Structurally, 1-methyl-6-methylidene-8,9-dihydro-7H-naphtho[1,2-g][1]benzofuran-10,11-dione (C18H14O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 278.30 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C18H14O3 |
| Molecular Weight | 278.30 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
Related methyl Standards
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- 11-Methylidene-4,10-dithia-1,8-diazatricyclo[7.3.0.0^{3,7}]dodeca-3(7),5,8-trien-2-one (CAS 126637-09-0)
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Recommended Standards
- 1-Methoxy-2-(prop-1-en-1-yl)anthracene-9,10-dione (CAS 64302-90-5)
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- 1-Hydroxy-2-(2-methylallyl)anthracene-9,10-dione (CAS 84736-03-8)
- 2-(4-Ethoxybenzylidene)-1H-indene-1,3(2H)-dione (CAS 57189-82-9)
- endo-9-Boc-3-oxa-9-azabicyclo[3.3.1]nonan-7-ol (CAS 1148006-31-8)
- 3-Bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylic Acid (CAS 500011-86-9)
- N-(5-Amino-2-methylphenyl)-3-isobutoxybenzamide (CAS 1020054-91-4)
- N2-Methyl-4-nitro-1,2-benzenediamine (CAS 95576-84-4)
- tert-Butyl 3-oxotetrahydro-3H-oxazolo[3,4-a]pyrazine-7(1H)-carboxylate (CAS 935544-47-1)
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- (5-((tert-Butoxycarbonyl)amino)pyridin-3-yl)boronic acid (CAS 1708122-98-8)
- 5-(5-Methyl-2-thienyl)thieno[2,3-d]pyrimidin-4-one, >97% (CAS 851116-03-5)
- Benzydamine EP Impurity B HCl (CAS 2196183-71-6)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com