Cefaclor Monohydrate CAS 70356-03-5
| CAS No. | 70356-03-5 |
| Molecular Formula | C15H14ClN3O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Cefaclor Monohydrate (CAS 70356-03-5) is a high-purity analytical reference standard with the molecular formula C15H14ClN3O4SH2O and a molecular weight of 385.82 g/mol.
Cefaclor Monohydrate (C15H14ClN3O4SH2O) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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 | C15H14ClN3O4S H2O |
| Molecular Weight | 385.82 g/mol |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefaclor Standards
- Cefaclor Impurity C10 (CAS 108260-07-7)
- Cefaclor Impurity 46 (CAS 134624-91-2&6453-64-1 (mixture))
- Cefaclor Impurity 23 (CAS 1426173-90-1)
- Cefaclor Impurity 24 (CAS 142975-51-7)
- Cefaclor EP Impurity C (CAS 143059-69-2)
- Cefaclor EP Impurity D (Mixture of Diastereomers) (CAS 152575-13-8)
- Cefaclor EP Impurity E (CAS 188915-50-6)
- Cefaclor Impurity 37 (CAS 21746-02-1)
Recommended Standards
- 4,7-difluorophthalazin-1-amine (CAS 2059932-57-7)
- Fluocinolone Acetonide Impurity 4 (CAS 62013-83-6)
- 1-Boc-4-(3-bromophenyl)piperazine (CAS 327030-39-7)
- 6-(Hydroxyamino)pyrimidine-2,4(3H,5H)-dione (CAS 4730-34-1)
- 2-{[2-(4-acetamidobenzenesulfonamido)phenyl]sulfanyl}-N-[5-(trifluoromethyl)-1,3,4-thiadiazol-2-yl]acetamide (CAS 478045-46-4)
- methyl 4-(1-ethyl-3,5-dimethyl-1H-pyrazol-4-yl)-2,4-dioxobutanoate (CAS 890624-55-2)
- 1-(2-Amino-4-hydroxy-3-methoxyphenyl)ethanone (CAS 1260683-60-0)
- 3-Bromo-N-(tert-butyl)-4-methoxybenzenesulfonamide (CAS 358665-60-8)
- Desmethyl Sibutramine (CAS 168835-59-4)
- Peptide YY (3-36) (human) (CAS 123583-37-9)
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