Cefalexin Monohydrate CAS 23325-78-2
| CAS No. | 23325-78-2 |
| Molecular Formula | C16H17N3O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Cefalexin Monohydrate.
CATO supplies Cefalexin Monohydrate (CAS 23325-78-2), a certified reference material (molecular formula C16H17N3O4SH2O, MW 365.40 g/mol) for analytical method development and quality control.
The molecular framework of Cefalexin Monohydrate (C16H17N3O4SH2O) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 H2O |
| Molecular Weight | 365.40 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefalexin Standards
- Cefalexin (CAS 15686-71-2)
- Cefalexin EP Impurity B Sodium Salt (CAS 56871-82-0)
- Cefalexin Impurity 30 (CAS 65870-51-1)
- Cefalexin EP Impurity F (CAS 79750-46-2)
- Cefalexin Monohydrate EP Impurity F (CAS CATO-C4X-122442)
- Cefalexin EP Impurity F(Trifluoroacetate) (CAS CATO-C4X-126114)
- Cefalexin Impurity 43 (CAS CATO-C4X-126143)
- Cefalexin Impurity 45 (CAS CATO-C4X-126145)
Recommended Standards
- (Butan-2-yl)[(2,3-dichlorophenyl)methyl]amine (CAS 893590-39-1)
- (S)-8-Fluorochroman-4-amine (CAS 1003887-62-4)
- N-(3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propyl)acrylamide (CAS 115258-10-1)
- 2-Bromo-4,6-dimethylbenzaldehyde (CAS 88174-53-2)
- 2-Chloromethyl-6-fluorobenzo[d]thiazole, 97% (CAS 124050-14-2)
- 1-Methyl-4-(thiophen-2-yl)pyrrolidine-3-carboxylic acid (CAS 1491505-37-3)
- Methyl Hydrazine Sulfate (CAS 302-15-8)
- n-(2-(Pyrrolidin-3-yl)ethyl)butyramide (CAS 1344279-36-2)
- Sodium dibutylcarbamodithioate (CAS 136-30-1)
- D-[Ser]8-Semaglutide (CAS CATO-CPTD788632)
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