4,4’-[(1-Phenylpyrazole-3,5-diyl)bis(ethene-2,1-diyl)]diphenol CAS 828911-79-1
| CAS No. | 828911-79-1 |
| Molecular Formula | C25H20N2O2 |
| Molecular Weight | 380.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4,4’-[(1-Phenylpyrazole-3,5-diyl)bis(ethene-2,1-diyl)]diphenol (CAS 828911-79-1), molecular formula C25H20N2O2 and molecular weight 380.44 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,4’-[(1-Phenylpyrazole-3,5-diyl)bis(ethene-2,1-diyl)]diphenol (C25H20N2O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 17.0, corresponding to approximately 17 ring(s) or double-bond equivalent(s). With a molecular weight of 380.44 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C25H20N2O2 |
| Molecular Weight | 380.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 4,4'-(Anthracene-9,10-diyl)dibenzonitrile (CAS 99372-96-0)
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- 4-(2,4-Dipropoxybenzylidene)-1-phenylpyrazolidine-3,5-dione (CAS 820237-41-0)
- 6-(Tritylamino)nicotinicacid (CAS 49647-10-1)
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- 3,4-Dichloro-5-(difluoromethoxy)cinnamic acid (CAS 1807413-35-9)
- 4-(Piperazin-2-yl)benzonitrile (CAS 65709-35-5)
- ACETYLTHIOCHOLINE BROMIDE (CAS 25025-59-6)
- 6-Amino-2-(2-nitrophenyl)quinoline-5,8-dione (CAS 61472-37-5)
- 5-(4-tert-Butylphenyl)-1,3-oxazole (CAS 243455-52-9)
- Semaglutide impurity 29 (CAS 110990-08-4)
- 3-Bromo-3,4-dihydroquinolin-2(1H)-one (CAS 1131594-73-4)
- 1-(Oxan-2-yl)ethan-1-amine (CAS 90048-32-1)
- endo-Arg30-Semaglutide (CAS CATO-C4X-2226281)
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