3,3',5,5'-Tetraiodo-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl CAS 37055-19-9
| CAS No. | 37055-19-9 |
| Molecular Formula | C18H18I4 |
| Molecular Weight | 741.95 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 3,3',5,5'-Tetraiodo-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl (CAS 37055-19-9), a certified reference material (molecular formula C18H18I4, MW 741.95 g/mol) for analytical method development and quality control.
Structurally, 3,3',5,5'-Tetraiodo-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl (C18H18I4) contains iodine substitution, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 741.95 g/mol, it falls into the 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.
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 | C18H18I4 |
| Molecular Weight | 741.95 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Halogen Content | I-containing |
Related Tetraiodo Standards
- 1,1',3,3'-Tetraiodo-4H,4'H,6H,6'H-5,5'-spirobi[silolo[3,4-c]thiophene] (CAS 138452-52-5)
- 3,5,3’,5’-Tetraiodo Thyroaldehyde-13C6 (CAS 1346601-51-1)
- 2,4,5,7-TETRAIODO-6-HYDROXY-3-FLUORONE (CAS 142189-38-6)
- 4,5,6,7-Tetraiodo-3H-benzo[c][1,2]oxathiol-3-one 1,1-dioxide (CAS 1745-83-1)
- 2,2',7,7'-Tetraiodo-9,9'-spirobi[fluorene] (CAS 137181-59-0)
- 2,3,4,5-Tetraiodo-1H-pyrrole (CAS 87-58-1)
- 3,3',6,6'-Tetraiodo-2,2',7,7'-tetramethoxy-9,9'-spirobi[fluorene] (CAS 1801236-30-5)
- 2,4,5,7-Tetraiodo-3-oxo-9-(2,3,4,5-tetrachlorophenyl)-3H-xanthen-6-yl acetate (CAS 133433-82-6)
Recommended Standards
- Erythromycin Impurity 13 (CAS 58781-38-7)
- CAS 2260670-74-2 (CAS 2260670-74-2)
- 23-O-Desmycinosyl-tylosin (CAS 79592-92-0)
- Dichlorobis[cyclohexyldi(1-piperidinyl)phosphine]palladium(ii) (CAS 1227935-54-7)
- 1-(bromomethyl)-2-chloro-4-iodobenzene (CAS 135049-84-2)
- (2,2-Difluorocyclopropyl)methanesulfonyl chloride (CAS 1260671-57-5)
- 2-(2,4-Dimethylphenoxy)acetohydrazide (CAS 72293-69-7)
- 1-Cyano-3-methylcyclobutane-1-carboxylic acid (CAS 1343155-63-4)
- tert-Butyl sec-butyl(5-(1-formylpiperidin-2-yl)pyridin-2-yl)carbamate (CAS 1352490-34-6)
- 5-Cyclopropyl-2-((3'-fluoro-[2,4'-bipyridin]-5-yl)amino)benzoic acid (CAS 1119085-23-2)
- Dimethyldimyristylammonium Chloride (CAS 10108-91-5)
- Amorolfine Impurity 123 (CAS CATO-C4X-1236123)
- 5,7-Difluoro-3-iodo-1H-indazole (CAS 944898-99-1)
- Peptide Impurity 04 (CAS 2913424-91-4)
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