Ampicillin EP Impurity B CAS 19379-33-0
| CAS No. | 19379-33-0 |
| Molecular Formula | C16H19N3O4S |
| Molecular Weight | 349.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Ampicillin EP Impurity B 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.
Ampicillin EP Impurity B (CAS 19379-33-0) is a certified pharmaceutical impurity reference standard with the molecular formula C16H19N3O4S and a molecular weight of 349.40 g/mol.
Structurally, Ampicillin EP Impurity B (C16H19N3O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 349.40 g/mol, it falls into the moderately-high-molecular-weight range. 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 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.
Physical & Chemical Properties
| Molecular Formula | C16H19N3O4S |
| Molecular Weight | 349.40 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.) | 1962 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ampicillin Standards
- Ampicillin Impurity 100 (CAS CATO-C4X-1443100)
- Ampicillin EP Impurity C(Isomeric mixture 2) (CAS CATO-C4X-144318)
- Ampicillin EP Impurity C(Isomeric mixture1) (CAS CATO-C4X-14433)
- Ampicillin Trihydrate EP Impurity N (CAS CATO-C4X-144353)
- Ampicillin Impurity 98 (CAS 49841-96-5)
- Ampicillin (CAS 69-53-4)
- Ampicillin Impurity 46 (CAS CATO-C4X-144346)
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Recommended Standards
- L-Cefradine (CAS CATO-C4X-121520)
- Cefradine delta-isomer (CAS 150870-62-5)
- Torasemide Impurity 22 (CAS CATO-C4X-183622)
- Febuxostat Impurity 65 (CAS CATO-C4X-116265)
- Aclidinium bromide Impurity 11 (CAS CATO-C4X-132511)
- Desmopressin Impurity 35 (CAS CATO-C4X-221535)
- Omarigliptin Impurity 19 (CAS CATO-C4X-114719)
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- 3,8-Dimethyl-3-(4-methylpent-3-en-1-yl)-3,11-dihydropyrano[3,2-a]carbazol-9-ol (CAS 144606-95-1)
- 4-Cyclopropyloxazol-2-amine (CAS 1247800-35-6)
- 1-(But-3-ynyl)-4-(pyridin-2-yl)piperazine (CAS 142891-45-0)
- (2E)-3-(4-Phenoxyphenyl)-2-propenoic Acid Ethyl Ester (CAS 945414-28-8)
- LymnaDFamide-1 (H-1648.0001) (CAS 148596-98-9)
- Insulin Degludec Impurity 6 (CAS CATO-C4X-21576)
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