4-Ethynyl-1,3-dioxaindane CAS 369363-94-0
| CAS No. | 369363-94-0 |
| Molecular Formula | C9H6O2 |
| Molecular Weight | 146.14 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-Ethynyl-1,3-dioxaindane.
4-Ethynyl-1,3-dioxaindane (CAS 369363-94-0), molecular formula C9H6O2 and molecular weight 146.14 g/mol, is a CATO reference standard with documented purity and traceability.
4-Ethynyl-1,3-dioxaindane (C9H6O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C9H6O2 |
| Molecular Weight | 146.14 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Ethynyl Standards
- 3-Ethynyl-2-hydroxybenzaldehyde (CAS 910459-12-0)
- 3-Ethynyl-5-hydroxybenzaldehyde (CAS 871345-34-5)
- 4-Ethynyl-2-hydroxybenzaldehyde (CAS 791068-99-0)
- 3-Ethynyl-5-fluoropicolinonitrile (CAS 1824167-99-8)
- 2-Ethynyl-1-methoxy-4-methylbenzene (CAS 104971-07-5)
- 1-Ethynyl-3-(methoxymethyl)benzene (CAS 1339108-03-0)
- (4-Ethynyl-3-methylphenyl)methanol (CAS 1357281-70-9)
- 1-Ethynyl-2-methoxy-4-methylbenzene (CAS 1572960-03-2)
Recommended Standards
- 4,5-Dihydroxy-1,3-dimethylimidazolidin-2-one (CAS 3923-79-3)
- 4-(hydroxymethyl)-1H-imidazole-5-carboxylic acid (CAS 215523-33-4)
- 4-Fluorothiophene-2-carboxylic Acid (CAS 32431-72-4)
- 4-(Acetyloxy)butanoic acid (CAS 26976-72-7)
- Hydrotris(triphenylphosphine)rhodium (CAS 16973-49-2)
- 3-Chloro-n-{3-cyano-4h,5h,6h-cyclopenta[b]thiophen-2-yl}propanamide (CAS 732271-45-3)
- tert-Butyl 4-(butylamino)piperidine-1-carboxylate (CAS 179556-92-4)
- Propyl 1H-indole-2-carboxylate (CAS 65873-38-3)
- 6-Methyl-4-(2-(trifluoromethyl)phenyl)pyridin-2-ol (CAS 1261495-28-6)
- (3S,4R)-3-bromo-4-hydroxytetrahydrothiophene 1,1-dioxide (CAS 1820580-20-8)
- Revefenacin impurity 91 HCl (CAS CATO-C4X-203191)
- 2-Chloro-6-fluoro-benzamidine hydrochloride (CAS 1170884-07-7)
- 4-Hydroxymethyl-1-methyl-2-piperidone (CAS 20845-32-3)
- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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