3,5-Diiodo-4-methyl-1H-pyrazole CAS 866639-16-9
| CAS No. | 866639-16-9 |
| Molecular Formula | C4H4I2N2 |
| Molecular Weight | 333.90 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 3,5-Diiodo-4-methyl-1H-pyrazole (CAS 866639-16-9), a certified reference material (molecular formula C4H4I2N2, MW 333.90 g/mol) for analytical method development and quality control.
The molecular framework of 3,5-Diiodo-4-methyl-1H-pyrazole (C4H4I2N2) is characterized by a nitrile group, iodine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
Physical & Chemical Properties
| Molecular Formula | C4H4I2N2 |
| Molecular Weight | 333.90 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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.) | 1987 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
Related Diiodo Standards
- 2,5-Diiodo-4-methylimidazole (CAS 149510-85-0)
- 2,4-Diiodo-1-methyl-1H-imidazole (CAS 71794-53-1)
- 3,4-Diiodo-5-methyl-1H-pyrazole (CAS 6715-87-3)
- 4,5-Diiodo-1-methylimidazole (CAS 37067-96-2)
- 4,5-Diiodo-2-methylimidazole (CAS 73746-44-8)
- 2,5-diiodo-1-methyl-1H-imidazole (CAS 86026-81-5)
- 1,5-Diiodo-3-methylpentane (CAS 51174-46-0)
- 4,5-diiodo-1-methyl-triazole (CAS 1248676-71-2)
Recommended Standards
- 3-Bromo-2,4-difluoro-6-iodoaniline (CAS 2219373-70-1)
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- 3-Bromo-2,5-difluoro-4-iodoaniline (CAS 2852766-94-8)
- 2-Bromo-4-(difluoromethyl)-5-iodopyridine (CAS 1806781-50-9)
- 3-Methylphthalaldehyde (CAS 147119-69-5)
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- (S)-2,2,2-trifluoro-1-(4-fluoro-3-methoxyphenyl)ethan-1-amine (CAS 1213065-21-4)
- 3-(2-(Heptadec-8-en-1-yl)-1-(2-hydroxyethyl)-4,5-dihydro-1H-imidazol-1-ium-1-yl)propanoate (CAS 67892-37-9)
- (2s,3s)-2-(9h-Fluoren-9-ylmethoxycarbonylamino)-3-(2-naphthyl)butanoicacid (CAS 208582-08-5)
- 1-(2,3-Dihydro-1h-inden-2-yl)propan-1-one (CAS 33982-87-5)
- 2-{[4-(2,4-dimethylbenzenesulfonamido)phenyl]formamido}acetic acid (CAS 796083-83-5)
- 1-(2-Isopropyl-1-methyl-1H-imidazol-5-yl)ethanone (CAS 403793-45-3)
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