2-(3-Oxocyclopentyl)acetic acid CAS 3128-05-0
| CAS No. | 3128-05-0 |
| Molecular Formula | C7H10O3 |
| Molecular Weight | 142.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-(3-Oxocyclopentyl)acetic acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 2-(3-Oxocyclopentyl)acetic acid (CAS 3128-05-0), a certified reference material (molecular formula C7H10O3, MW 142.15 g/mol) for analytical method development and quality control.
Based on its molecular formula C7H10O3, 2-(3-Oxocyclopentyl)acetic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 142.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C7H10O3 |
| Molecular Weight | 142.15 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
Related Oxocyclopentyl Standards
- (R)-2-(3-Oxocyclopentyl)acetic acid (CAS 2630-44-6)
- (S)-2-(3-Oxocyclopentyl)acetic acid (CAS 2630-37-7)
- 3-(2-Oxocyclopentyl)propanenitrile (CAS 4594-77-8)
- 2-methyl-2-(2-oxocyclopentyl)propanenitrile (CAS 29777-64-8)
- 4-(2-oxocyclopentyl)azetidin-2-one (CAS 426260-25-5)
- 2-(2-methyl-3-oxocyclopentyl)acetic acid (CAS 57026-65-0)
- 3-(3-Oxocyclopentyl)propanoic acid (CAS 34399-77-4)
- Methyl 2-(2-oxocyclopentyl)acetate (CAS 4934-95-6)
Recommended Standards
- 2-(3-Hydroxybicyclo[1.1.1]pentan-1-yl)acetic acid (CAS 2209090-44-6)
- 2-(Vinyloxy)ethyl acrylate (CAS 41440-38-4)
- 2-(3,6-Dihydro-2H-pyran-4-yl)acetic acid (CAS 632328-42-8)
- 2,2-dimethyl-3-oxocyclobutane-1-carboxylic acid (CAS 3183-43-5)
- Carphenazine (CAS 2622-30-2)
- (1-((4-Fluoropiperidin-1-yl)methyl)cyclopropyl)methanol (CAS 2882104-23-4)
- Purine nucleoside Phosphorylase, 200 units/mg (CAS 9030-21-1)
- 5-Bromo-4-ethylpyrimidin-2-amine (CAS 1381937-04-7)
- b-Humulene (Technical Grade) (CAS 116-04-1)
- 4-(Difluoromethyl)-3,5-diiodopyridine (CAS 1805305-57-0)
- 4-cyclopropyl-3-methyl-4H-1,2,4-triazole (CAS 1432681-21-4)
- (S)-1-(8-Methylimidazo[1,2-a]pyridin-3-yl)ethanamine dihydrochloride (CAS 1373029-21-0)
- 7,8-Dimethyl-2-pyridin-3-ylquinoline-4-carbonyl-chloride hydrochloride (CAS 1332528-39-8)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
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