5-Cyclopropyl-2-methylfuran-3-carboxylic acid CAS 698990-99-7
| CAS No. | 698990-99-7 |
| Molecular Formula | C9H10O3 |
| Molecular Weight | 166.17 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 5-Cyclopropyl-2-methylfuran-3-carboxylic acid.
5-Cyclopropyl-2-methylfuran-3-carboxylic acid (CAS 698990-99-7) is a high-purity analytical reference standard with the molecular formula C9H10O3 and a molecular weight of 166.17 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 5-Cyclopropyl-2-methylfuran-3-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 166.17 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C9H10O3 |
| Molecular Weight | 166.17 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 |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
Related Cyclopropyl Standards
- 2-cyclopropyl-1,1-difluoro-3-methoxypropan-2-ol (CAS 1538740-34-9)
- Methyl 3-cyclopropyl-1h-pyrazole-5-carboxylate (CAS 1036733-11-5)
- 5-Cyclopropyl-1-methyl-1h-pyrazole-4-carboxylic acid (CAS 1092394-30-3)
- 5-Cyclopropyl-N-methylisoxazole-4-carboxamide (CAS 124845-01-8)
- Methyl 2-cyclopropyl-1h-imidazole-4-carboxylate (CAS 1250136-57-2)
- 1-Cyclopropyl-3-methyl-1h-pyrazole-5-carboxylic acid (CAS 1254199-92-2)
- methyl 1-cyclopropyl-1H-imidazole-4-carboxylate (CAS 1260655-08-0)
- 3-Cyclopropyl-5-methyl-1H-pyrazole-4-carboxylic acid (CAS 1287752-79-7)
Recommended Standards
- 5,6,7,8-tetrahydro-1H-isochromene-1,3(4H)-dione (CAS 3711-74-8)
- 5-Ethoxy-2-hydroxybenzaldehyde (CAS 80832-54-8)
- 5,5-Difluoro-3,3-dimethylpentanoic acid (CAS 2026374-42-3)
- 5-Ethoxybenzo[d][1,3]dioxole (CAS 87590-41-8)
- N-(cyclopropylmethyl)cyclohexanamine (CAS 99175-40-3)
- 2-(1H-Benzo[d][1,2,3]triazol-1-yl)propanamide (CAS 115054-71-2)
- 6-(2-Oxocyclopentyl)nicotinic acid (CAS 1391257-66-1)
- (S)-3-Aminoheptan-1-ol hydrochloride (CAS 1402805-31-5)
- Dinopenton (CAS 5386-57-2)
- 2-Amino-N-(sec-butyl)-3-phenylpropanamidehydrochloride (CAS 1246172-68-8)
- 4-([1,1'-Biphenyl]-2-ylmethyl)-N-isopropylpiperidine-4-carboxamide (CAS 1361116-77-9)
- 3-Iodobenzamide (CAS 10388-19-9)
- (7-Bromo-2-methyl-2,3-dihydropyrazolo[5,1-b]oxazol-2-yl)methanol (CAS 2894830-81-8)
- Neuroendocrine Regulatory Peptide-4 (human, mouse, rat) (H-7266.1000) (CAS 922704-18-5)
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