3-Ethyl-4-iodo-1H-pyrazole CAS 442876-19-9
| CAS No. | 442876-19-9 |
| Molecular Formula | C5H7IN2 |
| Molecular Weight | 222.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-Ethyl-4-iodo-1H-pyrazole (CAS 442876-19-9), a certified reference material (molecular formula C5H7IN2, MW 222.03 g/mol) for analytical method development and quality control.
Owing to a nitrile group, iodine substitution, 3-Ethyl-4-iodo-1H-pyrazole is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 222.03 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 | C5H7IN2 |
| Molecular Weight | 222.03 g/mol |
| Appearance | 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 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- 5-Iodo-1,4-dimethyl-1H-imidazole (CAS 1036991-39-5)
- 1-Ethyl-3-iodo-1H-pyrazole (CAS 1202781-34-7)
- 4-Iodo-1,5-dimethyl-1H-imidazole (CAS 133838-77-4)
- 1-Ethyl-5-iodo-1H-pyrazole (CAS 1392274-29-1)
- 3-Iodo-1,4-dimethyl-1H-pyrazole (CAS 1395443-04-5)
- 5-Iodo-1,4-dimethyl-1H-pyrazole (CAS 1420831-53-3)
- 1-Ethyl-5-iodo-1H-imidazole (CAS 1450739-53-3)
- 3-Iodo-4,5-dimethyl-1H-pyrazole (CAS 1533443-11-6)
Recommended Standards
- 3-Bromo-4-(1,1-difluoroethyl)pyridine (CAS 2246373-31-7)
- 4,6-dichloro-2-ethyl-5-nitropyrimidine (CAS 6237-95-2)
- 3-bromo-2,5-difluoro-4-methylaniline (CAS 2092001-78-8)
- 4,6-Dichloro-5-methoxypicolinic acid (CAS 408536-01-6)
- 1-benzoyl-7-bromo-5-phenyl-1h-1,5-benzodiazepine-2,4(3h,5h)-dione 29092-34-0 AR-1C1642 (CAS 29092-34-0)
- 2-(1-(Naphthalen-1-yl)ethylidene)hydrazine-1-carboxamide (CAS 120446-09-5)
- 3-((((1-Isopropyl-1H-pyrazol-5-yl)methyl)amino)methyl)phenol hydrochloride (CAS 1856053-03-6)
- Olanzapine 4'-N-Glucuronide (CAS 186792-79-0)
- 2-Bromo-4-(trifluoromethyl)aniline hydrochloride (CAS 54403-97-3)
- Bismuth(III) 2,4,6-tribromophenolate (CAS 5175-83-7)
- 2-Methyl-N-(4-oxo-2-(m-tolyl)-4H-chromen-6-yl)benzamide (CAS 923131-58-2)
- 2-(Aminomethyl)-3-cyano-6-(difluoromethyl)pyridine-5-carboxaldehyde (CAS 1805188-18-4)
- 4-Bromo-3-chloro-5-(difluoromethyl)pyridine-2-carboxylic acid (CAS 1805170-15-3)
- Semaglutide impurity 63 (CAS CATO-C4X-222663)
Why CATO?
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