2-Hydroxy-5-methoxy-3-tridecylcyclohexa-2,5-diene-1,4-dione CAS 19833-82-0
| CAS No. | 19833-82-0 |
| Molecular Formula | C20H32O4 |
| Molecular Weight | 336.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Hydroxy-5-methoxy-3-tridecylcyclohexa-2,5-diene-1,4-dione (CAS 19833-82-0), molecular formula C20H32O4 and molecular weight 336.47 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Hydroxy-5-methoxy-3-tridecylcyclohexa-2,5-diene-1,4-dione (C20H32O4) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C20H32O4 |
| Molecular Weight | 336.47 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
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- N-(6-Chloro-4-(piperazin-1-yl)pyrido[3,2-d]pyrimidin-2-yl)acetamide (CAS 917758-24-8)
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- Methyl 3,3-dimethyl-2-[(E)-[(4-nitrophenyl)methylidene]amino]butanoate (CAS 1173540-20-9)
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- D-Pro36-Tirzepatide (CAS CATO-CPTD788903)
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