5-(Cyclopropylmethyl)thiophene-2-carboxylic acid CAS 1781767-22-3
| CAS No. | 1781767-22-3 |
| Molecular Formula | C9H10O2S |
| Molecular Weight | 182.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-(Cyclopropylmethyl)thiophene-2-carboxylic acid (CAS 1781767-22-3), molecular formula C9H10O2S and molecular weight 182.24 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 5-(Cyclopropylmethyl)thiophene-2-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 182.24 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).
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 | C9H10O2S |
| Molecular Weight | 182.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Sulfur Atoms | 1 |
Related Cyclopropylmethyl Standards
- N-(cyclopropylmethyl)piperidine-3-carboxamide (CAS 1016501-58-8)
- N-(cyclopropylmethyl)piperidine-2-carboxamide (CAS 1105064-29-6)
- 1-(Cyclopropylmethyl)cyclohexane-1-carboxylic acid (CAS 1261269-81-1)
- n-(Cyclopropylmethyl)-1-(thiazol-2-yl)ethan-1-amine (CAS 937667-32-8)
- (cyclopropylmethyl)[2-(piperidin-1-yl)ethyl]amine (CAS 1183051-22-0)
- 2-(cyclopropylmethyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1344115-77-0)
- N-(cyclopropylmethyl)-4-ethylcyclohexan-1-amine (CAS 1019538-97-6)
- n-(Cyclopropylmethyl)-2,3-dimethylcyclohexan-1-amine (CAS 1218403-20-3)
Recommended Standards
- 2-(Ethylthio)nicotinamide (CAS 175135-27-0)
- 1-(5-Methyl-2-(methylthio)pyrimidin-4-yl)ethanone (CAS 1823887-76-8)
- 2-(Phenylsulfanyl)propanoic acid (CAS 17431-94-6)
- 2-[(2-methylphenyl)sulfanyl]acetic acid (CAS 18619-15-3)
- tert-Butyl 4-((pyridin-2-ylthio)methyl)piperidine-1-carboxylate (CAS 745066-46-0)
- Erlotinib Impurity 24 (CAS 134690-40-7)
- 1-(4-(5-(Phenanthren-2-yl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)phenyl)guanidine (CAS 742112-34-1)
- Methyl 2-amino-4-(4-(sec-butyl)phenyl)thiophene-3-carboxylate (CAS 350990-15-7)
- N-(2-aminoethyl)-4-methylbenzamide hydrochloride (CAS 17197-12-5)
- 2-(Ethoxymethylene)-4,4-dimethylcyclohexan-1-one (CAS 1344828-41-6)
- EAI045 (CAS 1942114-09-1)
- 3-(o-Tolyl)pyrrolidine (CAS 954220-67-8)
- [3-(Benzenesulfonyl)propanesulfonyl]benzene (CAS 53893-41-7)
- (Leu31,Pro34)-Peptide YY (human) trifluoroacetate salt (CAS 179986-95-9)
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