4,4-Bis(2-ethylhexyl)-4H-cyclopenta[1,2-b:5,4-b']dithiophene CAS 365547-20-2
| CAS No. | 365547-20-2 |
| Molecular Formula | C25H38S2 |
| Molecular Weight | 402.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4-Bis(2-ethylhexyl)-4H-cyclopenta[1,2-b:5,4-b']dithiophene (CAS 365547-20-2), molecular formula C25H38S2 and molecular weight 402.70 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4,4-Bis(2-ethylhexyl)-4H-cyclopenta[1,2-b:5,4-b']dithiophene (C25H38S2) is characterized by sulfur-containing functionality, a polycyclic aromatic system. 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 presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C25H38S2 |
| Molecular Weight | 402.70 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Sulfur Atoms | 2 |
Related Bis Standards
- Bis(2-ethylhexyl) 3,3'-thiodipropionate (CAS 10526-15-5)
- Ethylhexyl Methoxycrylene (CAS 947753-66-4)
- 9-(2-Ethylhexyl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole (CAS 856422-42-9)
- 9-(2-Ethylhexyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole (CAS 856422-41-8)
- Bis(2-ethylhexyl) 2,2'-disulfanediyldiacetate (CAS 62268-47-7)
- Bis(2-ethylhexyl) octanedioate (CAS 5238-22-2)
- Tris(2-ethylhexyl) borate (CAS 2467-13-2)
- 2-Ethylhexyl Stearate (CAS 22047-49-0)
Recommended Standards
- 1-Bromoeicosane-d41 (CAS 202480-71-5)
- 5,6-Dichloro-2-(2-chloropyridin-3-yl)-1-[(2-methylphenyl)methyl]-1H-1,3-benzodiazole (CAS 338774-09-7)
- 17-O-tert-Butyldimethylsilyl 5,14-Androstadiene-3β,17β-diol (CAS 61252-32-2)
- 5,6-Dichloro-2-(2-chloropyridin-3-yl)-1-[(3-methylphenyl)methyl]-1H-1,3-benzodiazole (CAS 338774-10-0)
- 3-(1-Benzyl-5-chloro-1H-benzo[d]imidazol-2-yl)pyridin-2(1H)-one (CAS 860649-49-6)
- 2-(4-Amino-5-(difluoromethyl)-3-nitropyridin-2-yl)acetic acid (CAS 1806797-33-0)
- 3-Piperidinyl 4-chloro-2-pyridinecarboxylatehydrochloride (CAS 1219949-52-6)
- 2-(Methylamino)-2-(p-tolyl)acetamide (CAS 865244-86-6)
- 3-(Tert-butyl)-1-(4-nitrophenyl)indeno[1,2-c]pyrazol-4(1H)-one (CAS 1020251-86-8)
- 4-(2-Bromo-1,1-dimethyl-ethyl)-2,2-dimethyl-[1,3]dioxolane (CAS 2228141-73-7)
- 3-Bromopyrazolo[1,5-a]pyrimidine-5-carboxylic acid (CAS 619306-85-3)
- 2-(2-(2-(2-Iodoethoxy)ethoxy)ethoxy)ethan-1-ol (CAS 136399-06-9)
- Ethyl (E)-N-(pyridin-2-yl)formimidate (CAS 99790-41-7)
- Tetrapeptide-30/Tegopep (CAS 1036207-61-0)
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