2,7-Dichloropyrazolo[1,5-a]pyrimidine CAS 1211535-91-9
| CAS No. | 1211535-91-9 |
| Molecular Formula | C6H3Cl2N3 |
| Molecular Weight | 188.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2,7-Dichloropyrazolo[1,5-a]pyrimidine (C6H3Cl2N3) is characterized by a nitrile group, chlorine substitution, an aromatic ring system. 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 2,7-Dichloropyrazolo[1,5-a]pyrimidine (CAS 1211535-91-9), a certified reference material (molecular formula C6H3Cl2N3, MW 188.01 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 2,7-Dichloropyrazolo[1,5-a]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 | C6H3Cl2N3 |
| Molecular Weight | 188.01 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Dichloropyrazolo Standards
- 3,7-Dichloropyrazolo[1,5-a]pyrimidine (CAS 1784924-19-1)
- 3,5-Dichloropyrazolo[1,5-a]pyrimidine (CAS 1823383-15-8)
- 4,6-Dichloropyrazolo[1,5-a]pyrazine (CAS 2127110-20-5)
- 5,7-Dichloropyrazolo[1,5-a]pyrimidine (CAS 57489-77-7)
- 4,6-Dichloropyrazolo[1,5-a]pyridine (CAS 1427501-80-1)
- 4,6-Dichloropyrazolo[1,5-a]pyridine-3-carbonitrile (CAS 2642164-54-1)
- 5,7-Dichloropyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 845895-95-6)
- 2-(5,7-Dichloropyrazolo[1,5-a]pyrimidin-6-yl)acetaldehyde (CAS 1956331-50-2)
Recommended Standards
- 5,8-Dichloroimidazo[1,2-a]pyrazine (CAS 117719-19-4)
- 6,8-Dichloroimidazo[1,2-a]pyrazine (CAS 1245645-38-8)
- 6,8-Dichloroimidazo[1,2-b]pyridazine (CAS 1161847-29-5)
- 2-Amino-3,5-dichloroisonicotinonitrile (CAS 1260654-33-8)
- JWH-011 (CAS 155471-13-9)
- 2-Propenoic acid, 2-methyl-, methyl ester, polymer with 1,3-butadiene and 2-propenenitrile (CAS 26098-47-5)
- (E)-3-allyl-2-thioxo-5-(3,4,5-trimethoxybenzylidene)thiazolidin-4-one (CAS 299904-48-6)
- 1-(2,2,2-Trifluoroethyl)-1H-pyrazole-5-carbaldehyde (CAS 1227685-53-1)
- Ethyl 2-amino-2-(3-methylcyclohexyl)acetate (CAS 1339327-40-0)
- 6'-(Benzyloxy)-7'-bromo-8'-fluoro-3',4'-dihydro-1'H-spiro[[1,3]dioxolane-2,2'-naphthalene] (CAS 2489408-40-2)
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- 4-(10H-Phenothiazin-10-yl)butan-1-amine (CAS 184776-54-3)
- (2-((4-Methoxybenzyl)oxy)phenyl)boronic acid (CAS 957062-80-5)
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