3-Chloro-2-methylpyrazolo[1,5-a]pyrimidine-6-sulfonyl chloride CAS 1421602-13-2
| CAS No. | 1421602-13-2 |
| Molecular Formula | C7H5Cl2N3O2S |
| Molecular Weight | 266.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 266.10 g/mol gives 3-Chloro-2-methylpyrazolo[1,5-a]pyrimidine-6-sulfonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 3-Chloro-2-methylpyrazolo[1,5-a]pyrimidine-6-sulfonyl chloride (CAS 1421602-13-2), a certified reference material (molecular formula C7H5Cl2N3O2S, MW 266.10 g/mol) for analytical method development and quality control.
3-Chloro-2-methylpyrazolo[1,5-a]pyrimidine-6-sulfonyl chloride (C7H5Cl2N3O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C7H5Cl2N3O2S |
| Molecular Weight | 266.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 5-Chloro-7-methyl-[1,2,4]triazolo[1,5-a]pyridine-2-sulfonyl chloride (CAS 175965-06-7)
- (5-Chloro-1,3-benzoxazol-2-yl)methanesulfonyl chloride (CAS 73943-89-2)
- 5-Chloro-2-methylbenzo[d]oxazole-6-sulfonyl chloride (CAS 88787-45-5)
- 6-Chloro-2-oxoindoline-5-sulfonyl Chloride (CAS 923231-83-8)
- 4-Chloro-1-(3-chloropyridin-2-yl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 1207826-75-2)
- 2-Chloro-N-(2-chlorophenyl)benzamide (CAS 2670-39-5)
- 2-Chloro-N-(3-chlorophenyl)benzamide (CAS 2447-89-4)
- 2-Chloro-N-(4-chlorophenyl)benzamide (CAS 319-39-1)
Recommended Standards
- (4,6-Dimethoxypyrimidin-2-yl)boronic acid (CAS 1374450-52-8)
- Methyl 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole-5-carboxylate (CAS 1622992-89-5)
- 2-(Chloromethyl)benzo[d]oxazole-6-sulfonyl chloride (CAS 1369133-76-5)
- 4-Iodo-6-methyl-2-(methylthio)pyrimidine (CAS 16879-42-8)
- Disperse Red 151 (CAS 70210-08-1)
- 7-Bromo-1-cyclopropyl-1H-[1,2,3]triazolo[4,5-c]pyridine (CAS 1539961-20-0)
- 1-(3-Chlorophenyl)-N-(o-tolyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (CAS 890945-98-9)
- 2-(Quinolin-4-yl)acetimidamide (CAS 1521284-07-0)
- 2-Bromo-6-chlorobenzo[d]oxazole (CAS 1254123-54-0)
- 7-Chloro-4-methoxy-1H-indole (CAS 948581-72-4)
- 5-Cyclopropyl-1H-1,2,3-triazole (CAS 1163692-73-6)
- 4-(Methylthio)-2-nitrobenzo[d]oxazole (CAS 1806582-01-3)
- 2-(Hydroxymethyl)-6-methylisonicotinic acid (CAS 1122089-16-0)
- Semaglutide impurity 95 (CAS CATO-C4X-222695)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com