Cefalexin CAS 15686-71-2
| CAS No. | 15686-71-2 |
| Molecular Formula | C16H17N3O4S |
| Molecular Weight | 347.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 347.39 g/mol gives Cefalexin distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Cefalexin (CAS 15686-71-2), a certified reference material (molecular formula C16H17N3O4S, MW 347.39 g/mol) for analytical method development and quality control.
Cefalexin (C16H17N3O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C16H17N3O4S |
| Molecular Weight | 347.39 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefalexin Standards
- Cefalexin Monohydrate EP Impurity F (CAS CATO-C4X-122442)
- Cefalexin EP Impurity F (CAS 79750-46-2)
- Cefalexin Impurity 49 (CAS CATO-C4X-126149)
- Cefalexin Impurity 50 (CAS CATO-C4X-126150)
- Cefalexin Impurity 46 (CAS CATO-C4X-126146)
- Cefalexin Impurity 30 (CAS 65870-51-1)
- Cefalexin Impurity 45 (CAS CATO-C4X-126145)
- Cefalexin Impurity 43 (CAS CATO-C4X-126143)
Recommended Standards
- Topramezone Impurity 2 (CAS CATO-C4X-35032)
- 2,6-Difluoro-N-(2-methoxyethyl)-N-(thiophen-3-ylmethyl)benzenesulfonamide (CAS 1219904-36-5)
- Cefaclor EP Impurity G-Isomer 1 (CAS 67308-21-8)
- 1-(4-O-Methoxymethyl-4-hydroxyphenyl)-4-(4-nitrophenyl)piperazine-d4 (CAS 1246819-68-0)
- 2-[amino(benzylsulfanyl)methylene]malononitrile (CAS 109228-98-0)
- (3S,4R)-3-amino-4-methylpyrrolidin-2-one (CAS 222301-68-0)
- Phenyl α-D-Thiomannopyranoside (CAS 77481-62-0)
- 1-(4-Chlorophenyl)-2-(phenylsulfonyl)ethan-1-one (CAS 38488-19-6)
- Vinorelbine EP Impurity J (CAS 38390-45-3)
- (2,3-Difluorophenyl)(2-methylpyridin-4-yl)methanone (CAS 1187169-03-4)
- 2-Morpholino-1-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)indolin-1-yl)ethan-1-one (CAS 1704067-45-7)
- 3-Amino-6-phenylpiperidin-2-one (CAS 1378302-33-0)
- 143230-42-6 2-(2-(6-Chloro-pyrimidin-4-yloxy)-phenyl)-3,3-dimethoxy-propionic acid methyl ester EC 604-340-6 (CAS 143230-42-6)
- Insulin B (22-25) (CAS 34367-73-2)
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