Topiramate Impurity 3 CAS 205248-77-7
| CAS No. | 205248-77-7 |
| Molecular Formula | H2NO3S |
| Molecular Weight | 96.09 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.
CATO supplies Topiramate Impurity 3 (CAS 205248-77-7), a certified reference material (molecular formula H2NO3S, MW 96.09 g/mol) for analytical method development and quality control.
The molecular framework of Topiramate Impurity 3 (H2NO3S) is characterized by a sulfone group. 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.
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 | H2NO3S |
| Molecular Weight | 96.09 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Freely soluble in water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| CAS Registry Year (est.) | 2015 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Topiramate Standards
- Topiramate Impurity 20 (CAS 38029-84-4)
- Topiramate EP Impurity E (D-fructopyranose) (CAS 6347-01-9)
- Topiramate Impurity 14 (CAS 4136-95-2)
- Topiramate Didesacetal Impurity Formate (CAS 106881-42-9（free base）)
- Topiramate Impurity 13 (CAS 70834-19-4)
- Topiramate Impurity 14 (CAS 32365-83-6)
- Topiramate Impurity 10 (CAS 66900-93-4)
- Topiramate Impurity 23 (CAS 18549-40-1)
Recommended Standards
- Pyrimidin-5(4H)-one (CAS 220560-87-2)
- Molsidomine Impurity 8 (CAS 1233340-43-6)
- Pyrimidin-5(2H)-one (CAS 220560-88-3)
- Glutaronitrile-1,5-13C2 (CAS 1189923-36-1)
- 6-bromo-4-chloro-5-nitro-2,3-dihydro-1-benzothiophene (CAS 2719786-53-3)
- n-(1,3-Dioxaindan-5-ylmethyl)-2-chloro-n-ethylacetamide (CAS 875164-13-9)
- 3-(Methoxycarbonyl)-5-((4-nitrobenzyloxy)carbonyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylic acid (CAS 1255574-57-2)
- 4-(5-(2-Aminoethyl)-1,2,4-oxadiazol-3-yl)-N,N-dimethylaniline (CAS 1435985-19-5)
- (E)-2-(5-acetylthiophen-2-yl)-3-(pyridin-4-yl)acrylonitrile (CAS 478261-05-1)
- Imrecoxib Impurity 50 (CAS CATO-C4X-237950)
- 2-[(3-methylbenzoyl)amino]propanoic acid (CAS 1397001-97-6)
- 4-(2,4-Dimethoxyphenyl)butan-1-ol (CAS 107153-52-6)
- 3,5-Dimethyl-4-(1,3-dithian-yl)-1-phenylpyrazole (CAS 201008-67-5)
- Peptide 441 (CAS CATO-CPTD788441)
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