1,3-Phenylenebis((4-bromophenyl)methanone) CAS 136039-69-5
| CAS No. | 136039-69-5 |
| Molecular Formula | C20H12Br2O2 |
| Molecular Weight | 444.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H12Br2O2, 1,3-Phenylenebis((4-bromophenyl)methanone) contains a steroid core, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 444.12 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
1,3-Phenylenebis((4-bromophenyl)methanone) (CAS 136039-69-5), molecular formula C20H12Br2O2 and molecular weight 444.12 g/mol, is a CATO reference standard with documented purity and traceability.
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.
As a certified reference material (CRM), 1,3-Phenylenebis((4-bromophenyl)methanone) 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 | C20H12Br2O2 |
| Molecular Weight | 444.12 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Br-containing |
Related Phenylenebis Standards
- 1,4-Phenylenebis((4-bromophenyl)methanone) (CAS 52497-29-7)
- 1,4-Phenylenebis(diphenylmethanol) (CAS 57155-57-4)
- 4,4'-(1,4-Phenylenebis(oxy))diphthalic acid (CAS 18959-88-1)
- 5,5'-(((1,4-Phenylenebis(methylene))bis(azanediyl))bis(methylene))bis(quinolin-8-ol) (CAS 918907-58-1)
- 1,1'-((1,3-Phenylenebis(oxy))bis(4,1-phenylene))bis(1H-pyrrole-2,5-dione) (CAS 115341-26-9)
- 1,1'-((1,4-Phenylenebis(oxy))bis(4,1-phenylene))bis(1H-pyrrole-2,5-dione) (CAS 82577-60-4)
- 1,4-Phenylenebis((4-(tert-butyl)-2,6-dimethylphenyl)methanone) (CAS 911836-46-9)
- 1,1'-(1,3-Phenylenebis(propane-2,2-diyl))bis(3-(pyridin-3-yl)urea) (CAS 847934-17-2)
Recommended Standards
- racemic-6,6-Dibromo-1,1-bi-2-naphthol (CAS 13185-00-7)
- (R)-(+)-3,3-Dibromo-1,1-bi-2-naphthol (CAS 149821-06-7)
- (S)-(-)-3,3’-Dibromo-1,1’-bi-2-naphthol (CAS 119707-74-3)
- (R)-(-)-6,6’-Dibromo-1,1’-bi-2-naphthol (CAS 65283-60-5)
- 1-Benzyl-2-methylpiperidine 777-38-8 (CAS 777-38-8)
- 1-(4-Fluorobenzyl)dihydropyrimidine-2,4(1H,3H)-dione (CAS 1263216-75-6)
- tert-butyl 2-(2-chloroacetyl)azetidine-1-carboxylate (CAS 1824404-47-8)
- Ethyl (1-methyl-1H-imidazol-2-yl)carbamate (CAS 740778-10-3)
- 3-(4-Chlorobenzoyl)-4-phenyl-1H-pyrrole (CAS 170939-09-0)
- Evocalcet impurity 49 (CAS CATO-C4X-248549)
- Amino-peg12-t-butyl ester (CAS 872340-65-3)
- 1,3-Diethyl-1H-imidazol-3-ium tetrafluoroborate (CAS 847335-65-3)
- Ethyl 5-hydroxy-1a,6b-dihydro-1H-cyclopropa[b]benzofuran-1-carboxylate (CAS 1643327-59-6)
- Semaglutide impurity 290 (CAS CATO-C4X-2226290)
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