1H-Pyrazolo[4,3-d]pyrimidine, 3-bromo-5,7-dichloro-3-bromo-5,7-dichloro-1H-pyrazolo[4,3-d]pyrimidine CAS 1934543-12-0
| CAS No. | 1934543-12-0 |
| Molecular Formula | C5HBrCl2N4 |
| Molecular Weight | 267.90 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.
1H-Pyrazolo[4,3-d]pyrimidine, 3-bromo-5,7-dichloro-3-bromo-5,7-dichloro-1H-pyrazolo[4,3-d]pyrimidine (CAS 1934543-12-0), molecular formula C5HBrCl2N4 and molecular weight 267.90 g/mol, is a CATO reference standard with documented purity and traceability.
1H-Pyrazolo[4,3-d]pyrimidine, 3-bromo-5,7-dichloro-3-bromo-5,7-dichloro-1H-pyrazolo[4,3-d]pyrimidine (C5HBrCl2N4) contains a nitrile group, chlorine/bromine 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.
As a certified reference material (CRM), 1H-Pyrazolo[4,3-d]pyrimidine, 3-bromo-5,7-dichloro-3-bromo-5,7-dichloro-1H-pyrazolo[4,3-d]pyrimidine 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 | C5HBrCl2N4 |
| Molecular Weight | 267.90 g/mol |
| Appearance | Off-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, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 4 |
Related H Standards
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- 2-Phenyl-pyrazolo[1,5-a]pyridine-3-carboxylic acid ethyl ester (CAS 51065-76-0)
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- 1H-Pyrazolo[4,3-b]pyridine, 6-[2-(2-chloro-5-pyrimidinyl)ethynyl]-1-methyl- (CAS 2539141-17-6)
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Recommended Standards
- 2-Bromo-1-(5-bromofuran-2-yl)ethan-1-one (CAS 17357-32-3)
- (5-Chloro-6-(2-chlorophenyl)pyridin-3-yl)boronic acid (CAS 2225173-79-3)
- 2,2-Dibromo-1-(furan-2-yl)ethanone (CAS 17357-25-4)
- (5-Chloro-6-(3-chlorophenyl)pyridin-3-yl)boronic acid (CAS 2225178-90-3)
- 7-Fluoro-1H-indole-4-carbonitrile (CAS 1154742-54-7)
- N-(piperidin-3-yl)-1-benzofuran-2-carboxamide hydrochloride (CAS 1384430-31-2)
- Methyl 2-[(4-benzylpiperidin-1-yl)methyl]-3-{[(2-ethoxyphenyl)carbamoyl]amino}benzoate (CAS 865660-37-3)
- Betamethasone impurity 73 (CAS 1203841-43-3)
- 3-(3-Oxocyclohexyl)benzonitrile (CAS 1391291-09-0)
- 1,3-Di(pyridin-4-yl)cyclopentane (CAS 865075-20-3)
- 5-Ethoxy-2-(thiophen-2-yl)oxazole-4-carboxylic acid (CAS 923710-57-0)
- n-(3,4-Difluorobenzyl)butan-2-amine (CAS 1019500-25-4)
- 4-(1,3-BEnzodioxol-5-yl)-1,3-thiazole, HCl (CAS 1177317-48-4)
- Semaglutide impurity 250 (CAS CATO-C4X-2226250)
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