1-Butyl-4-fluorobenzene CAS 20651-65-4
| CAS No. | 20651-65-4 |
| Molecular Formula | C10H13F |
| Molecular Weight | 152.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 1-Butyl-4-fluorobenzene (CAS 20651-65-4), a certified reference material (molecular formula C10H13F, MW 152.21 g/mol) for analytical method development and quality control.
Structurally, 1-Butyl-4-fluorobenzene (C10H13F) contains fluorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 152.21 g/mol, it falls into the medium-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).
As a certified reference material (CRM), 1-Butyl-4-fluorobenzene 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 | C10H13F |
| Molecular Weight | 152.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | F-containing |
Related Butyl Standards
- 1-Butyl-3-fluorobenzene (CAS 20651-66-5)
- 2-fluorobenzene-1-carbothioamide (CAS 75907-82-3)
- 2-Fluorobenzene-1-sulfinic acid (CAS 763049-18-9)
- 4-Fluorobenzene-1-sulfinic acid (CAS 369-51-7)
- 2-Fluorobenzene-1,3,5-tricarbonitrile (CAS 13519-91-0)
- 319-03-9 4-FLUOROBENZENE-1,2-DICARBOXYLIC ANHYDRIDE 4-FLUOROPHTHALIC ACID ANHYDRIDE 4-Fluorophthalic anhydride 5-FLUORO-1,3-DIHYDRO-2-BENZOFURAN-1,3-DIONE 5-FLUORO-1,3-ISOBENZOFURANDIONE 5-FLUORO-2-BENZOFURAN-1,3-DIONE 5-FLUOROISOBENZOFURAN-1,3-DIONE AS02025 (CAS 319-03-9)
- 371-42-6 4-FLUOROBENZENE-1-THIOL 4-FLUOROTHIOPHENOL 4-MERCAPTOFLUOROBENZENE 4-fluorobenzenethiol AS04129 P-FLUOROPHENYL MERCAPTAN P-FLUOROTHIOPHENOL (CAS 371-42-6)
- 2-Fluorobenzene-1,3-diol (CAS 103068-40-2)
Recommended Standards
- 1-Fluoro-4-methyl-2-(propan-2-yl)benzene (CAS 53987-36-3)
- 1-[(2E)-2-Buten-1-Yl]-2-Fluorobenzene (CAS 222640-87-1)
- 1-Sec-Butyl-4-Fluorobenzene (CAS 326879-17-8)
- 1,3-Dihydrobenzo[c]thiophene 2-oxide (CAS 3533-72-0)
- (2R,3R,4R,5R)-5-(6-(TRITYLAMINO)-9H-PURIN-9-YL)-4-(TRITYLOXY)-2-((TRITYLOXY)METHYL)TETRAHYDROFURAN-3-OL (CAS 31085-56-0)
- 2-Amino-4-methyl-thiazole-5-carboxylic acid(2-hydroxy-ethyl)-amide (CAS 362003-35-8)
- 3-Chlorobenzylmagnesium chloride, 0.50 M in 2-MeTHF (CAS 29874-01-9)
- (R)-2-(2-chloro-3-(trifluoromethyl)phenyl)-2-(methylamino)ethan-1-ol (CAS 1335673-23-8)
- (2,4-Difluorophenyl)(3-fluoro-4-methylphenyl)methanone (CAS 1097129-30-0)
- 5-(2,5-Dichlorophenyl)pyrimidin-2-amine (CAS 1111104-96-1)
- (R)-tert-Butyl 2-((R)-2-amino-3-methoxy-3-oxopropyl)pyrrolidine-1-carboxylate (CAS 2756662-42-5)
- 3-Bromo-4-chlorobenzoyl chloride (CAS 21900-34-5)
- 3-(Piperidin-4-yl)-1,3-oxazinan-2-one hydrochloride (CAS 1233955-65-1)
- Semaglutide impurity 50 (CAS 2773558-66-8)
Why CATO?
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