4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride (purified by sublimation) CAS 129808-00-0
| CAS No. | 129808-00-0 |
| Molecular Formula | C18H6O6 |
| Molecular Weight | 318.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride (purified by sublimation) (CAS 129808-00-0) is a high-purity analytical reference standard with the molecular formula C18H6O6 and a molecular weight of 318.24 g/mol.
4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride (purified by sublimation) (C18H6O6) contains a flavonoid core, 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.
Physical & Chemical Properties
| Molecular Formula | C18H6O6 |
| Molecular Weight | 318.24 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
Related Ethyne Standards
- 5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde (CAS 2237965-02-3)
- 5,5'-(Ethyne-1,2-diyl)diisophthalic acid (CAS 957014-38-9)
- 5,5'-(Ethyne-1,2-diyl)dinicotinic acid (CAS 2594907-89-6)
- 3,3'-(Ethyne-1,2-diyl)dibenzoic acid (CAS 75077-81-5)
- 4,4'-(Ethyne-1,2-diyl)bis(2-hydroxybenzaldehyde) (CAS 791068-96-7)
- (Ethyne-1,2-diylbis(4,1-phenylene))diboronic acid (CAS 915772-85-9)
- 4,4'-(Ethyne-1,2-diyl)bis(N,N-dimethylaniline) (CAS 62063-67-6)
- 1,1'-(6,6'-(Ethyne-1,2-diyl)bis(pyridine-6,2-diyl))diethanone (CAS 874379-29-0)
Recommended Standards
- tert-Butyl 2-bromo-4H,5H,6H,7H-thieno[2,3-c]pyridine-6-carboxylate (CAS 910443-31-1)
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- tert-Butyl (2-bromo-5-cyclopropylthiophen-3-yl)carbamate (CAS 2567558-05-6)
- 2-(3,4-Dichlorophenyl)-4-(tetrahydro-2H-pyran-2-yloxy)-1-butanamine (CAS 135936-08-2)
- 2-Methylanthraquinone (CAS 84-54-8)
- 4-((1S)-Carboxy(((1-(2-nitrophenyl)ethoxy)carbonyl)amino)methyl)phthalic acid (CAS 1257323-85-5)
- 3,4-Dibromo-2-fluorobenzenesulfonyl chloride (CAS 1807041-46-8)
- O-(1,1,2,2,2-pentadeuterioethyl)hydroxylamine (CAS 690204-48-9)
- Mono-2-O-(p-toluenesulfonyl)-γ-cyclodextrin (CAS 97227-32-2)
- 1-Bromo-5-(bromomethyl)-3-fluoro-2-nitrobenzene (CAS 1807120-92-8)
- tert-butyl (2S,4R)-4-azido-2-(methylsulfonylmethyl)pyrrolidine-1-carboxylate (CAS 2749601-03-2)
- 3-(Trifluoromethyl)benzamide (CAS 1801-10-1)
- 5-Amino-2-(1H-imidazol-1-yl)benzamide (CAS 1248002-47-2)
- Insulin Degludec Impurity 5 (CAS CATO-C4X-21575)
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