40545-65-1 Pyrazole, 3-amino-4-(p-chlorophenyl)- 3-Amino-4(p-chlorophenyl)-pyrazole BRN 0641017 USAF EL-83 CAS 40545-65-1
| CAS No. | 40545-65-1 |
| Molecular Formula | C9H12ClN3 |
| Molecular Weight | 197.66 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 40545-65-1 Pyrazole, 3-amino-4-(p-chlorophenyl)- 3-Amino-4(p-chlorophenyl)-pyrazole BRN 0641017 USAF EL-83 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.
40545-65-1 Pyrazole, 3-amino-4-(p-chlorophenyl)- 3-Amino-4(p-chlorophenyl)-pyrazole BRN 0641017 USAF EL-83 (CAS 40545-65-1), molecular formula C9H12ClN3 and molecular weight 197.66 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H12ClN3, 40545-65-1 Pyrazole, 3-amino-4-(p-chlorophenyl)- 3-Amino-4(p-chlorophenyl)-pyrazole BRN 0641017 USAF EL-83 contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 197.66 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C9H12ClN3 |
| Molecular Weight | 197.66 g/mol |
| Appearance | Off-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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- 2-Chloro-3-iodo-6-(trifluoromethoxy)pyridine (CAS 1221172-03-7)
- 1-(4-bromophenyl)-5-phenyl-1H-1,2,4-triazole-3-carboxylic acid (CAS 92425-18-8)
- 7-Bromoquinolin-5-ol (CAS 1261677-80-8)
- 3-Cyclopropyl-5-isothiocyanato-1-methyl-1H-pyrazole (CAS 1349718-31-5)
- 3-[4-(difluoromethoxy)phenyl]-1,2-oxazol-5-amine (CAS 1020955-05-8)
- 2-Chloro-4-ethoxybenzaldehyde (CAS 245368-31-4)
- 2-(4-Amino-2-(difluoromethyl)benzoyl)pyridine (CAS 1261590-38-8)
- Neuropeptide K, porcine (CAS 106441-70-7)
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