(4-Fluoro-2-methylphenyl)urea CAS 188796-85-2
| CAS No. | 188796-85-2 |
| Molecular Formula | C8H9FN2O |
| Molecular Weight | 168.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of (4-Fluoro-2-methylphenyl)urea (C8H9FN2O) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
(4-Fluoro-2-methylphenyl)urea (CAS 188796-85-2) is a high-purity analytical reference standard with the molecular formula C8H9FN2O and a molecular weight of 168.17 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C8H9FN2O |
| Molecular Weight | 168.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 2010 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 3-Methyl-5-nitrothiophene-2-carbonitrile (CAS 1881321-64-7)
- 2-Amino-2-(4-fluorophenyl)acetamide (CAS 189138-28-1)
- Methyl 5-cyanothiazole-4-carboxylate (CAS 1823379-40-3)
- 3H-Thieno[2,3-d]imidazole-5-carboxylic acid (CAS 193066-59-0)
- n-Ethyl-2,4-dimethylaniline hydrochloride (CAS 1193388-36-1)
- 2-(3-Formyl-5-methoxy-indol-1-yl)-acetamide (CAS 876898-31-6)
- tert-Butyl (S)-2-chloro-7-(1-methoxyethyl)pyrazolo[1,5-a]pyrimidine-6-carboxylate (CAS 1832580-79-6)
- (S)-1-(2-fluoro-4-(trifluoromethyl)phenyl)-2-methoxyethan-1-amine (CAS 1269938-59-1)
- 3-Chloro-2,5,6-trifluoro-4-hydrazinylbenzonitrile (CAS 933674-75-0)
- 4-(Piperazin-1-yl)butane-1-sulfonic acid (CAS 684283-98-5)
- 2-(Pyrrolidin-2-ylmethoxy)acetic acid hydrochloride (CAS 1390654-95-1)
- Methyltetrazine-propylamine (CAS 1802978-47-7)
- 2,4-Dichloro-6-(((4-iodophenyl)imino)methyl)phenol (CAS 91692-91-0)
- Epidermal Growth Factor Receptor Peptide (985-996) (CAS 96249-43-3)
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