ethyl 2-(2,3-dihydro-1H-inden-1-ylidene)acetate CAS 28002-99-5
| CAS No. | 28002-99-5 |
| Molecular Formula | C13H14O2 |
| Molecular Weight | 202.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
ethyl 2-(2,3-dihydro-1H-inden-1-ylidene)acetate (CAS 28002-99-5), molecular formula C13H14O2 and molecular weight 202.25 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, ethyl 2-(2,3-dihydro-1H-inden-1-ylidene)acetate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 202.25 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C13H14O2 |
| Molecular Weight | 202.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
Related ethyl Standards
- 2,3-Dihydro-4H-thieno[2,3-b]thiopyran-4-one 1,1-dioxide (CAS 131352-47-1)
- 2,3-Dihydro-1H-inden-1-yl methacrylate (CAS 189172-28-9)
- 1-(2,3-Dihydro-1H-inden-1-yl)imidazolidin-2-one (CAS 911718-28-0)
- 1,4-Dihydro-6,7-dimethoxy-1,4-methanonaphthalene (CAS 54576-19-1)
- 3',4'-Dihydro-2'H-spiro[cyclopropane-1,1'-naphthalene]-5'-carboxylic acid (CAS 2245322-60-3)
- N-(2,3-Dihydro-1H-inden-1-yl)-4,5-dihydrooxazol-2-amine (CAS 33587-61-0)
- N-(4,5-Dihydro-1H-imidazol-2-yl)isoindolin-2-amine (CAS 72745-59-6)
- Dihydro-1-(2-methoxyethyl)-2-thioxo-4,6(1H,5H)-pyrimidinedione (CAS 560995-25-7)
Recommended Standards
- ethyl 2-(1H-inden-3-yl)acetate (CAS 4709-56-2)
- ethyl 2-hydrazinyl-4-methylpyrimidine-5-carboxylate (CAS 66373-46-4)
- Ethyl 2-(1,4-dihydroxycyclohexyl)acetate (CAS 99978-73-1)
- Ethyl 3-(1,3-Dioxolane)hexanoate (CAS 76924-94-2)
- (2S)-2-(4-(2-(2,4-Diamino-6,7-dihydro-5H-cyclopenta[d]pyrimidin-5-yl)ethyl)benzamido)pentanedioic acid (CAS 149325-93-9)
- 7-Fluorobenzo[d][1,3]dioxole-5-carbaldehyde (CAS 724770-53-0)
- 1-(5-Bromopyrazin-2-yl)pyridin-2(1H)-one (CAS 959238-26-7)
- 6,7-Dimethoxy-2-methylquinolin-4(1H)-one (CAS 686279-47-0)
- H-Gly-Trp-Gly-Gly-OH (CAS 24591-52-4)
- (1R,2R)-1-iodo-2-(perfluoropropyl)cyclohexane (CAS 7589-43-7)
- 2,3-Diamino-4-bromo-5-fluoro-6-nitrotoluene (CAS 1427503-28-3)
- 2-(6-Chloro-4-(difluoromethyl)-5-methoxypyridin-2-yl)acetonitrile (CAS 1804370-78-2)
- 2-(2,5-Dimethylthiazol-4-yl)acetic Acid (CAS 306937-38-2)
- Semaglutide Impurity 167 (CAS CATO-C4X-2226167)
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