Cefixime impurity 85 CAS CATO-C4X-113985
| CAS No. | CATO-C4X-113985 |
| Molecular Formula | C16H15N5O8S2 |
| Molecular Weight | 469.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cefixime impurity 85 (CAS CATO-C4X-113985) is a certified pharmaceutical impurity reference standard with the molecular formula C16H15N5O8S2 and a molecular weight of 469.45 g/mol.
Based on its molecular formula C16H15N5O8S2, Cefixime impurity 85 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 469.45 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C16H15N5O8S2 |
| Molecular Weight | 469.45 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefixime Standards
- Cefixime Impurity 12 (CAS 1335555-87-7)
- Cefixime Impurity 55 (CAS CATO-C4X-113955)
- Cefixime Impurity 20 (CAS CATO-C4X-113920)
- Cefixime Methyl Ester Impurity (CAS 88621-01-6)
- Cefixime Impurity 81 (CAS CATO-C4X-113981)
- Cefixime Impurity C16 (CAS 1335475-08-5)
- Cefixime Impurity 100 (CAS CATO-C4X-1139100)
- Cefixime Impurity 17 (CAS CATO-C4X-113917)
Recommended Standards
- Tert-butyl (8S)-6-amino-5,7,7-tricyano-8-(4-(trifluoromethyl)phenyl)-3,7,8,8a-tetrahydroisoquinoline-2(1H)-carboxylate (CAS 1212459-44-3)
- 2-(2-(3,4-Bis(4-methoxyphenyl)-1H-pyrazol-1-yl)ethoxy)-5-(trifluoromethyl)pyridine (CAS 956961-76-5)
- (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[4-(trifluoromethyl)phenyl]butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[4-(trifluoromethyl)phenyl]butyric acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-[4-(trifluoromethyl)phenyl]butanoic acid 269726-78-5 Fmoc-(R)-3-Amino-4-(4-trifluoromethylphenyl)-butyric acid (CAS 269726-78-5)
- {[4-(Benzyloxy)phenyl]methyl}[(4-fluorophenyl)methyl]{[4-(trifluoromethyl)-1H-imidazol-2-yl]methyl}amine (CAS 1186194-70-6)
- Brivaracetam Impurity 25 HCl (CAS 357338-46-6)
- Lidocaine Impurity 33 (CAS 1374010-02-2)
- Carbocisteine Impurity 22 (CAS CATO-C4X-201022)
- 3-(((2-Fluorophenyl)amino)methyl)phenol (CAS 1019482-83-7)
- 3-Fluoro-5-((7-(methylthio)-1-oxo-2,3-dihydro-1H-inden-4-yl)oxy)benzonitrile (CAS 1672665-69-8)
- 7-Chloro-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazine (CAS 1260667-70-6)
- N-Methylpiperidin-4-amine dihydrobromide (CAS 1397198-91-2)
- (S)-2-(Trifluoromethyl)indoline (CAS 1350632-23-3)
- Copper(Ⅱ) formate tetrahydrate (CAS 5893-61-8)
- Myristoyl Pentapeptide -4 acetate (CAS 959610-30-1(free base))
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