Cefdinir Impurity 38 CAS 37155-50-3
| CAS No. | 37155-50-3 |
| Molecular Formula | C14H14O2 |
| Molecular Weight | 214.26 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Cefdinir Impurity 38 (C14H14O2) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Cefdinir Impurity 38 (CAS 37155-50-3), a pharmacopoeial impurity reference standard (molecular formula C14H14O2, MW 214.26 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.
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 | C14H14O2 |
| Molecular Weight | 214.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
Related Cefdinir Standards
- Cefdinir CP Impurity C (CAS 79349-82-9)
- Cefdinir Impurity 37 (CAS CATO-C4X-121037)
- Cefdinir Impurity 74 (CAS CATO-C4X-121074)
- Cefdinir Impurity 52 (CAS 66338-96-3)
- Cefdinir CP Impurity A (CAS 1450758-21-0)
- Cefdinir USP Impurity A (CAS 178949-03-6)
- Cefdinir Impurity 53 (CAS 178422-40-7)
- Cefdinir Impurity 34 (CAS 73150-67-1)
Recommended Standards
- 6-((4R,5S)-5-Methyl-2-oxoimidazolidin-4-yl)hexanoic acid (CAS 533-48-2)
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- Tert-butyl 4- formyl piperazine -1- carboxylate (CAS 183383-30-4)
- Nabumetone Impurity 21 (CAS 68427-22-5)
- Dopamine Impurity 35 (CAS CATO-C4X-190835)
- Ibrutinib Impurity 40 (CAS CATO-C4X-106440)
- Delafloxacin Impurity 9 (CAS 2097714-09-3)
- Imidazo[1,5-a]pyrazine-8-thiol (CAS 746547-06-8)
- HISTIDINE Impurity 10 (CAS CATO-C4X-323910)
- 3-Methoxyphenyl 2-(4-piperidinyl)ethyl ether (CAS 946715-97-5)
- Diflumetorim (CAS 130339-07-0)
- Methyl 2-(4-fluorophenyl)imidazo[1,2-a]pyridine-6-carboxylate (CAS 866133-01-9)
- 3-((3,4-Difluorobenzyl)oxy)-piperidine hydrochloride (CAS 745066-70-0)
- Liraglutide-d8 Tritrifluoroacetate (CAS CATO-C4X-199223)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com