1-(Cyclopent-2-en-1-yl)-5-fluoropyrimidine-2,4(1H,3H)-dione CAS 138191-89-6
| CAS No. | 138191-89-6 |
| Molecular Formula | C9H9FN2O2 |
| Molecular Weight | 196.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(Cyclopent-2-en-1-yl)-5-fluoropyrimidine-2,4(1H,3H)-dione (CAS 138191-89-6), molecular formula C9H9FN2O2 and molecular weight 196.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, 1-(Cyclopent-2-en-1-yl)-5-fluoropyrimidine-2,4(1H,3H)-dione is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 196.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C9H9FN2O2 |
| Molecular Weight | 196.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Cyclopent Standards
- 1-(Cyclopent-2-en-1-yl)piperidine-4-carboxylic acid (CAS 1216669-89-4)
- Cyclopent-3-en-1-yl(3-(hydroxymethyl)pyrrolidin-1-yl)methanone (CAS 1339711-56-6)
- 2-(Cyclopent-2-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 287944-11-0)
- 2-(Cyclopent-2-en-1-yl)-1-(5-methylfuran-2-yl)ethanone (CAS 189443-24-1)
- Benzyl cyclopent-3-ene-1-carboxylate (CAS 130762-09-3)
- 1-(Cyclopent-1-en-1-yl)-4-nitrobenzene (CAS 38805-71-9)
- Phenyl cyclopent-3-en-1-ylcarbamate (CAS 1774933-49-1)
- (3-(Cyclopent-1-en-1-yl)phenyl)boronic acid (CAS 1256345-86-4)
Recommended Standards
- Ethyl 5-fluoro-2-formylbenzoate (CAS 1379252-40-0)
- 2-(3-Acetyl-5-fluorophenyl)acetic acid (CAS 1393540-43-6)
- 4-Fluoro-3-propanoylbenzoic acid (CAS 1378847-99-4)
- 3-Fluoro-5,6,7,8-tetrahydro-1,8-naphthyridine-4-carboxylic acid (CAS 1393547-01-7)
- 1-Methyl-1,9-diazaspiro[5.5]Undecane dihydrochloride (CAS 2378507-14-1)
- spiro[cyclopropane-2,1-indane]-1-carboxylic acid (CAS 1250150-08-3)
- 1-(3-Nitrophenyl)-3-(trifluoromethyl)benzene (CAS 194874-02-7)
- Aripiprazole Impurity N2 (CAS 2220149-92-6)
- 3-(5-Fluoropyridin-3-yl)benzoic acid (CAS 1247805-05-5)
- 2,6-Diamino-5-(6-hydroxyhexyl)pyrimidin-4(1H)-one (CAS 647831-42-3)
- 5-Methyl-2-phenylquinoline (CAS 500595-66-4)
- Trimethyl((2-methylcyclohex-1-en-1-yl)oxy)silane (CAS 19980-35-9)
- (S)-Methyl 4-(1-amino-2-hydroxyethyl)benzoate hydrochloride (CAS 1336889-03-2)
- Semaglutide impurity 196 (CAS CATO-C4X-2226196)
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