Ampicillin Impurity 38 CAS CATO-C4X-144338
| CAS No. | CATO-C4X-144338 |
| Molecular Formula | C18H23N3O4S |
| Molecular Weight | 377.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Ampicillin Impurity 38 (C18H23N3O4S) 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).
Ampicillin Impurity 38 (CAS CATO-C4X-144338) is a certified pharmaceutical impurity reference standard with the molecular formula C18H23N3O4S and a molecular weight of 377.46 g/mol.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Ampicillin Impurity 38 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C18H23N3O4S |
| Molecular Weight | 377.46 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 |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ampicillin Standards
- Ampicillin Impurity 82 (CAS CATO-C4X-144382)
- Ampicillin Impurity 94 (CAS CATO-C4X-144394)
- Ampicillin Impurity 27 （Mixture of Diastereoisomer） (CAS CATO-C4X-144327)
- Ampicillin Impurity 87 (CAS CATO-C4X-144387)
- Ampicillin Impurity 92 (CAS CATO-C4X-144392)
- Ampicillin EP Impurity D (CAS 32746-94-4)
- Ampicillin Impurity 37 (CAS CATO-C4X-144337)
- Ampicillin Impurity 90 (CAS CATO-C4X-144390)
Recommended Standards
- N-[1-(4-Methylbenzyl)-1,3-dihydro-2H-1,3-benzimidazol-2-yliden]benzenesulfonamide (CAS 860787-87-7)
- Biotin impurity 40 (CAS CATO-C4X-156340)
- N-(Furan-2-ylmethyl)-2-((1-(3-hydroxypropyl)-2-oxo-1,2,5,6,7,8-hexahydroquinazolin-4-yl)thio)acetamide (CAS 899974-01-7)
- Hydroxy Pioglitazone-D5 (Major) (M-IV) (Mixture of Diastereomers) (CAS 1189445-29-1)
- Dalbavancin Impurity 10 (CAS CATO-C4X-160210)
- [Ser]8-Acetylated Semaglutide (CAS CATO-C4X-2226218)
- Posaconazole impurity 213 (CAS CATO-C4X-1208213)
- 1-Ethyl-3-(trifluoromethyl)benzene (CAS 27190-70-1)
- 4-(Trifluoromethyl)pyrimidine (CAS 136547-16-5)
- (R)-2,2,2-Trifluoro-1-(4-methoxyphenyl)ethanamine hydrochloride (CAS 2007916-98-3)
- N,N-Dibutyl-2-(diphenylphosphoryl)acetamide (CAS 80413-41-8)
- Budesonide Impurity 56 (CAS CATO-C4X-138956)
- 3-(Pyrimidin-2-ylthio)propan-1-amine (CAS 64380-81-0)
- Human glucagon CRS (CAS 9007-92-5)
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