3,3',3'',4,4',4''-Hexamethyl-2,2':5',2''-terthiophene CAS 114224-82-7
| CAS No. | 114224-82-7 |
| Molecular Formula | C18H20S3 |
| Molecular Weight | 332.55 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.
3,3',3'',4,4',4''-Hexamethyl-2,2':5',2''-terthiophene (CAS 114224-82-7), molecular formula C18H20S3 and molecular weight 332.55 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to sulfur-containing functionality, a polycyclic aromatic system, 3,3',3'',4,4',4''-Hexamethyl-2,2':5',2''-terthiophene is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 332.55 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C18H20S3 |
| Molecular Weight | 332.55 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Sulfur Atoms | 3 |
Related Hexamethyl Standards
- 1,1,1,3,3,3-Hexamethyl-2,2-diphenyltrisilane (CAS 18549-83-2)
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- 3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propan-1-amine (CAS 25357-81-7)
- 1,1,3,3,5,5-Hexamethyl-1,5-diphenyltrisiloxane (CAS 17977-72-9)
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