Cefuroxime Impurity 33 CAS 1467-70-5
| CAS No. | 1467-70-5 |
| Molecular Formula | C6H4O4 |
| Molecular Weight | 140.09 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Cefuroxime Impurity 33 (C6H4O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 140.09 g/mol, it falls into the low-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).
CATO supplies Cefuroxime Impurity 33 (CAS 1467-70-5), a pharmacopoeial impurity reference standard (molecular formula C6H4O4, MW 140.09 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), Cefuroxime Impurity 33 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C6H4O4 |
| Molecular Weight | 140.09 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Cefuroxime Standards
- Cefuroxime Impurity 41 (CAS 75884-38-7)
- Cefuroxime Sodium Impurity 14 (CAS 69384-96-9)
- Cefuroxime Sodium EP Impurity I (CAS 39684-61-2)
- Cefuroxime Impurity 41 (CAS CATO-C4X-124541)
- Cefuroxime Axetil Impurity 7 (CAS 59176-08-8)
- Cefuroxime Impurity 58 (CAS 54434-94-5)
- Cefuroxime Impurity 35 (CAS 883-40-9)
- Cefuroxime Impurity 82 (CAS CATO-C4X-124582)
Recommended Standards
- 2,6-Dihydroxy-2,5-cyclohexadiene-1,4-dione (CAS 35069-70-6)
- Coumalic Acid (CAS 500-05-0)
- 2,5-Dihydroxy-1,4-benzoquinone (CAS 615-94-1)
- 4-Hydroxy-2-nitropyridine (CAS 101654-28-8)
- Thiamine Impurity 15 (CAS 24941-82-0)
- Pregabalin Impurity 3 (CAS 916982-10-0)
- Abemaciclib Impurity 30 DiHCl (CAS 2124229-65-6 (free base))
- (S)-4-Aminotetrahydrofuran-2-one Hydrochloride (CAS 117752-82-6)
- 3-(ethyl[(9h-fluoren-9-ylmethoxy)carbonyl]amino)propanoic acid (CAS 172965-67-2)
- (3-chloropyridin-2-yl)zinc pivalate (0.60 mmol/g) (CAS 2021255-88-7)
- N-(3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)acetamide (CAS 20036-97-9)
- 2-(Cyclopropyl(2,4-dichlorobenzyl)amino)acetic acid (CAS 1184251-45-3)
- 4-Allyl-5-(methoxymethyl)-4H-1,2,4-triazole-3-thiol (CAS 634166-18-0)
- Semaglutide impurity 86 (CAS CATO-C4X-152686)
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