1-(2,5-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde CAS 98949-18-9
| CAS No. | 98949-18-9 |
| Molecular Formula | C10H6Cl2N2O |
| Molecular Weight | 241.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1-(2,5-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde (CAS 98949-18-9), molecular formula C10H6Cl2N2O and molecular weight 241.07 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H6Cl2N2O, 1-(2,5-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 241.07 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 1-(2,5-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C10H6Cl2N2O |
| Molecular Weight | 241.07 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichlorophenyl Standards
- 3-(2,4-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde (CAS 1031794-72-5)
- 5-(2,4-Dichlorophenyl)pyrimidin-2-ol (CAS 103824-18-6)
- 5-(2,3-Dichlorophenyl)-2-furaldehyde (CAS 106827-26-3)
- 5-(3,5-Dichlorophenyl)furan-2-carbaldehyde (CAS 106827-27-4)
- 5-(2,5-Dichlorophenyl)pyrimidin-2-ol (CAS 1111103-83-3)
- 5-(2,3-Dichlorophenyl)pyrimidin-2-ol (CAS 1111108-08-7)
- 5-(3,4-Dichlorophenyl)pyrimidin-2-ol (CAS 1111108-09-8)
- 5-(3,5-Dichlorophenyl)pyrimidin-2-ol (CAS 1111113-76-8)
Recommended Standards
- 1-(2,3-Dichloroquinoxalin-5-yl)ethanone (CAS 459835-98-4)
- 1-(3,4-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde (CAS 445302-83-0)
- (4-(Azetidin-1-ylsulfonyl)phenyl)boronic acid (CAS 871329-68-9)
- 1-ethyl-5-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole (CAS 2364586-95-6)
- potassium;acetoxymethyl(trifluoro)boranuide (CAS 910251-35-3)
- (2-(6-Ethoxypyridin-3-yl)pyrrolidin-1-yl)(phenyl)methanone (CAS 1352500-44-7)
- N'-Benzylidene-3-isopropyl-1H-pyrazole-5-carbohydrazide (CAS 303108-11-4)
- (2-Methoxyphenyl)(piperazin-1-yl)methanone (CAS 100939-88-6)
- Methyl (S)-2-(bis(tert-butoxycarbonyl)amino)-4-oxobutanoate (CAS 219617-09-1)
- 1-(dimethylamino)-3-methylbutan-2-ol (CAS 1533077-04-1)
- Phenazine-1-carbaldehyde (CAS 1082-80-0)
- 2,4,6-Triiodo-3-(N-methylcarbamoyl)-5-(N-methylacetylamino)benzoic Acid (CAS 21656-26-8)
- 3-Iodo-5-methylthiophene (CAS 16494-35-2)
- Semaglutide impurity 106 (CAS CATO-C4X-2226106)
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