[1-(Methylsulfonyl)-4-pyrazolyl]boronic Acid CAS 1201643-87-9
| CAS No. | 1201643-87-9 |
| Molecular Formula | C4H7BN2O4S |
| Molecular Weight | 189.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), [1-(Methylsulfonyl)-4-pyrazolyl]boronic Acid 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.
[1-(Methylsulfonyl)-4-pyrazolyl]boronic Acid (CAS 1201643-87-9) is a high-purity analytical reference standard with the molecular formula C4H7BN2O4S and a molecular weight of 189.99 g/mol.
Owing to a carbohydrate-derived structure, an amide group, a sulfone group, [1-(Methylsulfonyl)-4-pyrazolyl]boronic Acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 189.99 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C4H7BN2O4S |
| Molecular Weight | 189.99 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.5 |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methylsulfonyl Standards
- 5-(Methylsulfonyl)furan-3-carboxylic Acid (CAS 1520606-32-9)
- 5-(Methylsulfonyl)furan-2-carboxylic Acid (CAS 23423-91-8)
- 5-(Methylsulfonyl)pyrimidine-2,4(1H,3H)-dione (CAS 16417-11-1)
- 1-(Methylsulfonyl)-1H-pyrazole-4-carboxylic acid (CAS 2306268-92-6)
- 6-(Methylsulfonyl)pyrimidine-2,4(1H,3H)-dione (CAS 6851-33-8)
- 1-(2-(Methylsulfonyl)ethyl)-1h-1,2,3-triazol-4-amine (CAS 1521331-21-4)
- 5-(Methylsulfonyl)-2-thiophenecarbaldehyde (CAS 177194-34-2)
- 3-(Methylsulfonyl)thiophene-2-carbaldehyde (CAS 2092396-88-6)
Recommended Standards
- 4,6-Dichloroisoxazolo[5,4-d]pyrimidine (CAS 1197193-09-1)
- 2-Bromo-5-methyloxazole-4-carbaldehyde (CAS 1240598-14-4)
- 1-Fluoronaphthalene-2-boronic acid (CAS 222547-67-3)
- 5-Bromo-1H-pyrrole-3-carboxylic acid (CAS 1269152-69-3)
- 6-Chloro-N-(1,3,4-thiadiazol-2-yl)pyridine-3-carboxamide (CAS 908544-78-5)
- 5-Iodo-2,6-dimethyl-N-[(thiophen-2-yl)methyl]pyrimidin-4-amine (CAS 677749-62-1)
- Spectinomycin Hydrochloride (CAS 22193-75-5)
- 4'-Methyl-[1,1'-biphenyl]-4-amine hydrochloride (CAS 811842-54-3)
- Allyl 4-(benzyloxy)-3-chloro-5-ethoxybenzoate (CAS 1706452-19-8)
- 5-bromo-2-(difluoromethyl)-1-methyl-1H-1,3-benzodiazole (CAS 1451215-69-2)
- 1-(Bromomethyl)-1-(ethoxymethyl)cyclobutane (CAS 1478876-82-2)
- 4-[(2-cyanophenyl)carbamoyl]butanoic acid (CAS 197310-78-4)
- 7-Bromo-4-methoxy-1-indanone (CAS 959058-59-4)
- Semaglutide impurity 233 (CAS CATO-C4X-2226233)
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