4-Oxo-4-(2-propynyloxy)butanoic acid CAS 189459-95-8
| CAS No. | 189459-95-8 |
| Molecular Formula | C7H8O4 |
| Molecular Weight | 156.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Oxo-4-(2-propynyloxy)butanoic acid (CAS 189459-95-8) is a high-purity analytical reference standard with the molecular formula C7H8O4 and a molecular weight of 156.14 g/mol.
The molecular framework of 4-Oxo-4-(2-propynyloxy)butanoic acid (C7H8O4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C7H8O4 |
| Molecular Weight | 156.14 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2011 |
Related Oxo Standards
- 4-(2-Propynyloxy)benzaldehyde (CAS 5651-86-5)
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Recommended Standards
- (S)-2-Amino-3-(isoxazol-3-yl)propanoic acid (CAS 189215-63-2)
- 1,5-Dimethyl-2-oxo-2,3-dihydro-1H-imidazole-4-carboxylic acid (CAS 1895681-18-1)
- (S)-2-Amino-3-(isoxazol-5-yl)propanoic acid (CAS 189215-61-0)
- methyl 3-(3-hydroxyoxetan-3-yl)prop-2-ynoate (CAS 1898208-76-8)
- 7-Chloro-5-[(3,4-dichlorophenyl)methyl]-2,3,4,5-tetrahydro-1,5-benzothiazepin-4-one (CAS 341968-14-7)
- 3-(6,7-Dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-propionic acid hydrochloride (CAS 881686-34-6)
- 5-(Benzyloxy)-6-fluoropyridin-3-ylboronic acid (CAS 2377609-45-3)
- Methyl n-[4-(hydroxymethyl)phenyl]carbamate (CAS 1341397-27-0)
- (+/-)-1,2-Propylene-d6 Oxide (Stabilized with hydroquinone) (CAS 202468-69-7)
- 9-([1,1'-Biphenyl]-4-yl)-9H-fluoren-9-ol (CAS 22653-07-2)
- 5-Chloro-2-(4-fluorophenyl)benzofuran (CAS 1448818-03-8)
- 2,2'-(Piperazine-1,4-diyl)bis(2-methylpropanenitrile) (CAS 408510-04-3)
- Methyl 2,5-dichloro-4-nitrobenzoate (CAS 63105-61-3)
- [D-His1]-Semaglutide (CAS CATO-C4X-2226127)
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