Oxitropium bromide EP Impurity C CAS 99571-64-9
| CAS No. | 99571-64-9 |
| Molecular Formula | C19H26NO4 |
| Molecular Weight | 332.41 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.
Oxitropium bromide EP Impurity C (CAS 99571-64-9), molecular formula C19H26NO4 and molecular weight 332.41 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Oxitropium bromide EP Impurity C is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 332.41 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.
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 | C19H26NO4 |
| Molecular Weight | 332.41 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 1 |
Related Oxitropium Standards
Recommended Standards
- Isopropyl 3-phenyl-3-(phenylsulfonyl)propanoate (CAS 2376300-52-4)
- Dexamethasone Impurity 25 (CAS 1880-61-1)
- Betamethasone Impurity 10 (CAS 38680-83-0)
- Dexamethasone Impurity 92 (CAS 2285-53-2)
- 2-Methyl-2-((5-nitropyridin-2-yl)thio)propanoic acid (CAS 952183-12-9)
- CAS 83418-48-8 (CAS 83418-48-8)
- 2-{7-Chloro-1H,2H,3H,4H,5H-pyrido[2,3-b][1,4]diazepin-4-yl}ethan-1-ol (CAS 1638604-53-1)
- 1-(Azepan-1-yl)-2-(3-hydroxypyrrolidin-1-yl)ethan-1-one (CAS 1467429-13-5)
- Vancomycin impurity 26 (CAS CATO-C4X-177526)
- 2,5-Dimethyl-1-[4-(methylsulfanyl)phenyl]-1H-pyrrole-3-carbaldehyde (CAS 923743-09-3)
- (E)-N-Methyl-N-((3-methylbenzofuran-2-yl)methyl)-3-(7-oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)acrylamide (CAS 620175-39-5)
- tert-Butyl (3-bromo-2,2-dimethylpropyl)carbamate (CAS 1397707-56-0)
- N-(1-cyclopropyl-3,3,3-trifluoropropyl)thietan-3-amine (CAS 1873000-93-1)
- Semaglutide impurity 259 (CAS CATO-C4X-2226259)
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