2,3-Bis(2,4,5-trimethyl-3-thienyl)maleimide CAS 220191-36-6
| CAS No. | 220191-36-6 |
| Molecular Formula | C18H19NO2S2 |
| Molecular Weight | 345.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 2,3-Bis(2,4,5-trimethyl-3-thienyl)maleimide (C18H19NO2S2) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 345.48 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
2,3-Bis(2,4,5-trimethyl-3-thienyl)maleimide (CAS 220191-36-6), molecular formula C18H19NO2S2 and molecular weight 345.48 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C18H19NO2S2 |
| Molecular Weight | 345.48 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2019 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Bis Standards
- 1,1,2-Trimethyl-3-(4-sulfobutyl)benz[e]indolium Inner Salt (CAS 63149-24-6)
- 2,6,6-Trimethyl-1-(4-phenoxyphenyl)-1,5,6,7-tetrahydro-4H-indol-4-one (CAS 497060-13-6)
- Trimethyl((perfluorophenyl)(phenyl)methoxy)silane (CAS 26349-14-4)
- 2,3-Bis(2,4,5-trimethyl-3-thienyl)maleic Anhydride (CAS 112440-47-8)
- N,3,3-trimethyl-2-(2-(4-phenylpiperazin-1-yl)acetamido)butanamide (CAS 318949-38-1)
- 3,4,4-Trimethyl-2-phenyl-1-tosylimidazolidine (CAS 88939-53-1)
- Methyl 4-(((1,3,5-trimethyl-1H-pyrazole)-4-sulfonamido)methyl)piperidine-1-carboxylate (CAS 1428378-76-0)
- Trimethyl(propoxy)silane (CAS 1825-63-4)
Recommended Standards
- (3E,5E)-3,5-Bis[(4-ethylphenyl)methylidene]-1-methylpiperidin-4-one (CAS 647031-88-7)
- 3-(1,3-Dithiolan-2-yl)phenol (CAS 27004-28-0)
- (3E,5E)-3,5-Bis[(2,4-dimethylphenyl)methylidene]-1-methylpiperidin-4-one (CAS 330657-24-4)
- 4-[1-(Phenylmethyl)-3-pyrrolidinyl]-1-piperazinecarboxylic Acid 1,1-Dimethylethyl Ester (CAS 885959-04-6)
- 2-Amino-3-(2,3-dihydroxyphenyl)propanoic acid (CAS 28095-48-9)
- 6-Amino-N-(tert-butoxycarbonyl)-2,2-dimethylhexanehydrazide (CAS 2034155-43-4)
- Dipropylcyclopropenone (CAS 698-93-1)
- 1-(2-Bromo-4-chlorophenyl)-2,5-dimethyl-1H-pyrrole (CAS 1502337-96-3)
- 2-Amino-4-(difluoromethyl)-5-hydroxynicotinonitrile (CAS 1806837-40-0)
- 1-[(2,2-Difluoro-2H-1,3-benzodioxol-5-yl)methyl]-2-oxo-N-(1-phenylethyl)-1,2-dihydropyridine-3-carboxamide (CAS 400083-12-7)
- 2-Chloro-n-(5-chloro-2-fluorophenyl)acetamide (CAS 855715-22-9)
- 4-(4-Methoxyphenyl)-5-methyl-4H-1,2,4-triazol-3-ol (CAS 85562-69-2)
- 1-(1,3-benzoxazol-2-yl)piperidin-4-amine,HCl (CAS 760940-88-3)
- Prolactin-Releasing Peptide (12-31) (human) (CAS 235433-36-0)
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