3,3,5-Tri-tert-butyl-5-chloro-[1,1-bi(cyclohexyl-idene)]-2,2,5,5-tetraene-4,4-dione CAS 42933-96-0
| CAS No. | 42933-96-0 |
| Molecular Formula | C24H31ClO2 |
| Molecular Weight | 386.95 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3,3,5-Tri-tert-butyl-5-chloro-[1,1-bi(cyclohexyl-idene)]-2,2,5,5-tetraene-4,4-dione 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.
3,3,5-Tri-tert-butyl-5-chloro-[1,1-bi(cyclohexyl-idene)]-2,2,5,5-tetraene-4,4-dione (CAS 42933-96-0) is a high-purity analytical reference standard with the molecular formula C24H31ClO2 and a molecular weight of 386.95 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, chlorine substitution, 3,3,5-Tri-tert-butyl-5-chloro-[1,1-bi(cyclohexyl-idene)]-2,2,5,5-tetraene-4,4-dione is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 386.95 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
Physical & Chemical Properties
| Molecular Formula | C24H31ClO2 |
| Molecular Weight | 386.95 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1969 |
| Halogen Content | Cl-containing |
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