4,5-Bis(diphenylphosphino)-4-cyclopentene-1,3-dione CAS 56641-87-3
| CAS No. | 56641-87-3 |
| Molecular Formula | C29H22O2P2 |
| Molecular Weight | 464.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4,5-Bis(diphenylphosphino)-4-cyclopentene-1,3-dione (C29H22O2P2) is characterized by a steroid core, organophosphorus functionality, 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).
4,5-Bis(diphenylphosphino)-4-cyclopentene-1,3-dione (CAS 56641-87-3) is a high-purity analytical reference standard with the molecular formula C29H22O2P2 and a molecular weight of 464.43 g/mol.
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 | C29H22O2P2 |
| Molecular Weight | 464.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
Related Bis Standards
- 1,5-Bis(diphenylphosphino)pentane 27721-02-4 1,5-BIS(DIPHENYLPHOSPHINO)PENTANE;1,5-PENTANEDIYLBIS[DIPHENYLPHOSPHINE];1-((5-(DIPHENYLPHOSPHINO)PENTYL)(PHENYL)PHOSPHINO)BENZENE;BIS(DIPHENYLPHOSPHINO)PENTANE;DPPENT;DPPPE;PENTAMETHYLENEBIS(DIPHENYLPHOSPHINE) SC11230 (CAS 27721-02-4)
- 2-[Bis(diphenylphosphino)methyl]pyridine (CAS 60398-55-2)
- N-(Diphenylphosphino)-N-[1-(1-methylcyclopropyl)ethyl]-P,P-diphenylphosphinous amide (CAS 1010117-74-4)
- (S)-2'-(Diphenylphosphino)-N-methyl-[1,1'-binaphthalen]-2-amine (CAS 371783-24-3)
- (S)-2-(8-(Diphenylphosphino)quinolin-2-yl)-4-phenyl-4,5-dihydrooxazole (CAS 244610-27-3)
- (R)-3-(Diphenylphosphino)-[1,1’-binaphthalene]-2,2’-diol (CAS 1227504-74-6)
- 2-(2,2-Bis(diphenylphosphino)ethyl)-1,1-dimethylhydrazine (CAS 105632-78-8)
- (S)-2'-(Diphenylphosphino)-[1,1'-binaphthalen]-2-ol (CAS 144868-15-5)
Recommended Standards
- 2F70GCU00A 17692-30-7 Diniprofylline Diniprofylline [INN:DCF] 7-(2,3-Dihydroxypropyl)theophylline bis(nicotinate ester) Nicotinic acid, diester with 7-(2,3-dihydroxypropyl)theophylline (8CI) 3-Pyridinecarboxylic acid, 1-((1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purin-7-yl)methyl)-1,2-ethanediyl ester Corverum (Dinicotinoyloxy-2,3-propyl)-7 theophylline [French] Diniprofilina [INN-Spanish] Diniprofyllinum [INN-Latin] EINECS 241-682-1 Theophylline, 7-(2,3-dihydroxypropyl)-, dinicotinate (ester) A 17 HF (Dinicotinoyloxy-2,3-propyl)-7 theophylline Diniprofilina Diniprofyllinum 3-(7-Theophyllinyl)propylen dinicotinat 7-(2,3-Dinicotinoyloxypropyl)theophyllin UNII-2F70GCU00A (CAS 17692-30-7)
- N-Fmoc-N’-trifluoroacetyl-L-lysine (CAS 76265-69-5)
- Hesperetin 7-O-glucoside (CAS 31712-49-9)
- N-Nitroso Aztreonam impurity 112 (CAS CATO-C4X-1522112)
- Methyl 3-hydroxy-7-iodobenzo[b]thiophene-2-carboxylate (CAS 2167947-96-6)
- 2-(Methylamino)pyrimidine-4-carboxylic acid (CAS 89691-96-3)
- GLP-2 (1-33) (human) (H-7742.1000) (CAS 223460-79-5)
- Benzyl 4-(3-aminobicyclo[1.1.1]Pentan-1-yl)piperazine-1-carboxylate (CAS 2227205-40-3)
- 3,6-Dibromo-2-fluorocinnamic acid (CAS 1807322-51-5)
- N-Methylpyridine-2-sulfonamide (CAS 66715-66-0)
- (4aS,9bR)-Ethyl 6-bromo-5-(2-(methylamino)-2-oxoethyl)-3,4,4a,5-tetrahydro-1H-pyrido[4,3-b]indole-2(9bH)-carboxylate (CAS 2098497-32-4)
- tert-Butyl ((2S,4S,5R)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate (CAS 1414933-91-7)
- 3-Acetoxy-2,4-dimethoxybenzophenone (CAS 109251-36-7)
- Des-Ser32-Tirzepatide (CAS CATO-CPTD788942)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com