1-[3,7-Bis(4-chlorophenyl)pyrazolo[1,5-a]pyrimidin-6-yl]-3,5-dimethyl-1H-pyrazole CAS 957003-27-9
| CAS No. | 957003-27-9 |
| Molecular Formula | C23H17Cl2N5 |
| Molecular Weight | 434.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 434.32 g/mol gives 1-[3,7-Bis(4-chlorophenyl)pyrazolo[1,5-a]pyrimidin-6-yl]-3,5-dimethyl-1H-pyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1-[3,7-Bis(4-chlorophenyl)pyrazolo[1,5-a]pyrimidin-6-yl]-3,5-dimethyl-1H-pyrazole (CAS 957003-27-9) is a high-purity analytical reference standard with the molecular formula C23H17Cl2N5 and a molecular weight of 434.32 g/mol.
1-[3,7-Bis(4-chlorophenyl)pyrazolo[1,5-a]pyrimidin-6-yl]-3,5-dimethyl-1H-pyrazole (C23H17Cl2N5) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C23H17Cl2N5 |
| Molecular Weight | 434.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
Related Bis Standards
- 4-(4-Chlorophenyl)-6-[(4-chlorophenyl)sulfanyl]-2-phenylpyrimidine-5-carbonitrile (CAS 320418-49-3)
- {4-[(4-chlorophenyl)sulfanyl]-3-nitrophenyl}methyl 3-chlorobenzoate (CAS 320424-11-1)
- 2-(4-Chlorophenyl)-N-(2-{4-[2-(4-chlorophenyl)acetyl]piperazin-1-yl}ethyl)acetamide (CAS 548438-13-7)
- N-(4-Chlorophenyl)-2-((3-ethyl-4-oxo-3,4,5,6,7,8-hexahydrobenzo[4,5]thieno[2,3-d]pyrimidin-2-yl)thio)acetamide (CAS 618879-65-5)
- 2-((5-(4-Chlorophenyl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)-1-(p-tolyl)ethanone (CAS 476485-84-4)
- 5-(4-Chlorophenyl)-N-(2,5-dimethoxyphenyl)-1-phenyl-1H-pyrazole-3-carboxamide (CAS 477712-41-7)
- 3-(2-Chlorophenyl)-5-methyl-4-(5-((3-(trifluoromethyl)phenoxy)methyl)-1H-1,2,4-triazol-3-yl)isoxazole (CAS 400078-58-2)
- 2-{[(4-chlorophenyl)sulfonyl]amino}-3-methyl-N-[3-(trifluoromethyl)phenyl]butanamide (CAS 317378-10-2)
Recommended Standards
- 1,6-Dimethylquinolin-2(1H)-one (CAS 29969-49-1)
- 4-[3-(2,6-Dichlorophenyl)-5-methyl-1,2-oxazole-4-carbonyl]-N-(2-methylbutan-2-yl)-1H-pyrrole-2-carboxamide (CAS 478064-56-1)
- N-(2-Bromo-4-methylphenyl)-2-((5-(4-methoxyphenyl)-1,3,4-oxadiazol-2-yl)thio)acetamide (CAS 337498-59-6)
- Tedizolid Impurity 66 (CAS CATO-C4X-105466)
- (4-(4-(4-Methyl-1H-imidazol-1-yl)phenyl)thiazol-2-yl)methanol (CAS 1206969-30-3)
- 4-Chloro-2-(propan-2-yl)aniline (CAS 76842-14-3)
- tert-Butyl 3-amino-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-carboxylate hydrochloride (CAS 1279844-40-4)
- 1-(4-methoxyphenyl)-3,5-dimethyl-1H-pyrazole-4-carboxylic acid (CAS 1001779-87-8)
- 2,3-Dibromo-4-(difluoromethoxy)pyridine (CAS 1806293-77-5)
- Ivacaftor Impurity 20 (CAS CATO-C4X-296420)
- 4-[(2-Chloropyridin-4-yl)oxy]-2,5-difluorobenzenamine (CAS 1225278-65-8)
- 3-Bromo-7-(2,4-dichlorophenyl)-2-methylpyrazolo[1,5-a]pyrimidine (CAS 478249-01-3)
- 4-Methoxy-3-(trifluoromethyl)phenacyl bromide (CAS 541550-00-9)
- Semaglutide impurity 72 (CAS CATO-C4X-222672)
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