4-Ethoxymethylene-2-(4-ethoxy-phenyl)-4H-isoquinoline-1,3-dione CAS 750607-40-0
| CAS No. | 750607-40-0 |
| Molecular Formula | C20H19NO4 |
| Molecular Weight | 337.37 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 4-Ethoxymethylene-2-(4-ethoxy-phenyl)-4H-isoquinoline-1,3-dione.
4-Ethoxymethylene-2-(4-ethoxy-phenyl)-4H-isoquinoline-1,3-dione (CAS 750607-40-0), molecular formula C20H19NO4 and molecular weight 337.37 g/mol, is a CATO reference standard with documented purity and traceability.
4-Ethoxymethylene-2-(4-ethoxy-phenyl)-4H-isoquinoline-1,3-dione (C20H19NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C20H19NO4 |
| Molecular Weight | 337.37 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1986 |
| Nitrogen Atoms | 1 |
Related Ethoxymethylene Standards
- 4-Ethoxymethylene-2-(4-isopropyl-phenyl)-4H-isoquinoline-1,3-dione (CAS 565168-52-7)
- (Ethoxymethylene)triphenylphosphorane (CAS 55812-81-2)
- 4-Ethoxymethylene-2-(3-trifluoromethyl-phenyl)-4H-isoquinoline-1,3-dione (CAS 499229-40-2)
- 4-(4-Ethoxymethylene-1,3-dioxo-3,4-dihydro-1H-isoquinolin-2-yl)-benzoic acid ethyl ester (CAS 750607-46-6)
- 2-Benzyl-4-ethoxymethylene-4H-isoquinoline-1,3-dione (CAS 749219-34-9)
- (E)-5-(Ethoxymethylene)-3-phenethyl-2-thioxothiazolidin-4-one (CAS 828299-72-5)
- 4-(Ethoxymethylene)-2-(naphthalen-1-yl)oxazol-5(4H)-one (CAS 269733-57-5)
- Ethyl 2-ethoxymethylene-4,4-difluoro-4-chloroacetoacetate (CAS 182551-59-3)
Recommended Standards
- 4-[(4-Benzyl-1-phthalazinyl)oxy]benzenecarbonitrile (CAS 338404-36-7)
- 4-Fluoro-N-(6-phenylimidazo[2,1-b]thiazol-5-yl)benzamide (CAS 889768-24-5)
- 4-(8-Ethoxy-1,3-dimethyl-4-oxocyclohepta[c]pyrrol-2(4H)-yl)benzoic acid (CAS 780779-13-7)
- 5-(n-(4-Fluorophenethyl)sulfamoyl)-2-methylbenzoic acid (CAS 794573-83-4)
- Glycopyrrolate Iodide (Mixture of diastereomers) (CAS 873295-32-0)
- 4-Ethoxy-N-(2-hydroxypropyl)benzenesulfonamide (CAS 1153437-06-9)
- Ethyl 2-(2-phenylthiazol-4-yl)acetate, 97% (CAS 16441-34-2)
- 5-Oxaspiro[3.5]Nonan-7-amine (CAS 1823516-17-1)
- (5-Bromofuran-2-yl)(3-methylpiperazin-1-yl)methanone hydrochloride (CAS 1583143-53-6)
- 2-[4-(3-Methylphenyl)piperazin-1-yl]-7-phenyl-3H,4H-thieno[3,2-d]pyrimidin-4-one (CAS 1226430-38-1)
- 3,4,5-Trimethoxy-2-nitrobenzaldehyde (CAS 55149-78-5)
- Argatroban Impurity 140 HCl (CAS CATO-C4X-1007140)
- cis-4-?[[2-?(1H-?Benzimidazol-?6-?ylamino)?-?8-?quinazolinyl]?oxy]?-?cyclohexanol (CAS 1792999-26-8)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
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