1-(4-Ethylphenyl)urea CAS 34773-66-5
| CAS No. | 34773-66-5 |
| Molecular Formula | C9H12N2O |
| Molecular Weight | 164.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-(4-Ethylphenyl)urea.
1-(4-Ethylphenyl)urea (CAS 34773-66-5) is a high-purity analytical reference standard with the molecular formula C9H12N2O and a molecular weight of 164.20 g/mol.
1-(4-Ethylphenyl)urea (C9H12N2O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. Its physicochemical properties are representative of its class; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C9H12N2O |
| Molecular Weight | 164.20 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 2 |
Related Ethylphenyl Standards
- (3-Ethylphenyl)urea (CAS 13114-80-2)
- (4-Ethylphenyl)acetic Acid (CAS 14387-10-1)
- 2-(2-Ethylphenyl)acetic acid (CAS 19418-95-2)
- 2-(3-Ethylphenyl)acetic acid (CAS 89723-25-1)
- 2-Ethylphenyl acetate (CAS 3056-59-5)
- 3-Ethylphenyl acetate (CAS 3056-60-8)
- 4-Ethylphenyl acetate (CAS 3245-23-6)
- 2-(2-Ethylphenyl)propan-2-ol (CAS 104174-11-0)
Recommended Standards
- 1-(4-Ethyl-3-hydroxyphenyl)ethanone (CAS 73898-20-1)
- 1-(4-Hydroxy-2,3-dimethylphenyl)ethanone (CAS 5384-57-6)
- 1-(4-Ethyl-2-hydroxyphenyl)ethanone (CAS 5896-50-4)
- 1-(4-Hydroxy-2,5-dimethylphenyl)ethan-1-one (CAS 26216-10-4)
- Methyl (1R,2R,4R)-7-oxabicyclo[2.2.1]Hept-5-ene-2-carboxylate (CAS 17791-32-1)
- 2-Methyl-6-(pyrrolidin-1-yl)pyridin-3-amine (CAS 1216094-51-7)
- n-[4-amino-3-(trifluoromethyl)phenyl]-5-methyl-1,2-oxazole-4-carboxamide hydrochloride (CAS 1193388-66-7)
- (S)-(-)-Nicotine-d4 (CAS 284685-07-0)
- 2-Bromo-4-iodo-6-(trifluoromethyl)pyridine (CAS 749875-09-0)
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- N-[3-Chloro-5-(trifluoromethyl)-2-pyridinyl]-4-fluoro-N-methylbenzenesulfonohydrazide (CAS 338748-65-5)
- N,N-Diphenyl-4'-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,1'-biphenyl]-4-amine (CAS 675571-82-1)
- Tirzepatide (CAS 2023788-19-2)
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