(S)-5,5'-Dibromo-3,3'-di-tert-butyl-6,6'-dimethyl-[1,1'-biphenyl]-2,2'-diol CAS 1170165-78-2
| CAS No. | 1170165-78-2 |
| Molecular Formula | C22H28Br2O2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(S)-5,5'-Dibromo-3,3'-di-tert-butyl-6,6'-dimethyl-[1,1'-biphenyl]-2,2'-diol (CAS 1170165-78-2) is a high-purity analytical reference standard with the molecular formula C22H28Br2O2S and a molecular weight of 516.33 g/mol.
Owing to a steroid core, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, (S)-5,5'-Dibromo-3,3'-di-tert-butyl-6,6'-dimethyl-[1,1'-biphenyl]-2,2'-diol is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 516.33 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), (S)-5,5'-Dibromo-3,3'-di-tert-butyl-6,6'-dimethyl-[1,1'-biphenyl]-2,2'-diol meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C22H28Br2O2 S |
| Molecular Weight | 516.33 g/mol |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related S Standards
- 3,5-Dibromo-2-chloro-4-methylpyridine (CAS 1000017-92-4)
- 3,5-Dibromo-2-chloro-6-methylpyridine (CAS 1000018-58-5)
- 2,6-Dibromo-4-(trifluoromethyl)pyridine (CAS 1000152-84-0)
- 3,5-Dibromo-2-fluoro-4-methylpyridine (CAS 1000340-01-1)
- 3,4-Dibromo-7-azaindole (CAS 1000340-33-9)
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Recommended Standards
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- Methyl 4-chloro-1-methyl-1H-pyrazole-3-carboxylate (CAS 1017784-04-1)
- 1-(2,3-Dihydro-1H-pyrrol-1-yl)-2,2,2-trifluoroethanone (CAS 85236-73-3)
- Tadalafil Impurity 20 (CAS 171752-68-4)
- Methyl 2-{1-[4-(1H-imidazol-1-yl)phenyl]ethylidene}-1-hydrazinecarboxylate (CAS 303148-80-3)
- 3-[4-(4-Fluorophenyl)piperazine-1-carbonyl]-5-methyl-5H,5aH,6H,7H,8H,9H,10H,12H-azepino[2,1-b]quinazolin-12-one (CAS 1775471-99-2)
- 4,6-Dihydroxyisophthalic Acid (CAS 19829-74-4)
- 2-((4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)methyl)pyridine (CAS 864754-22-3)
- Ebastine EP Impurity C HCl (CAS 65214-86-0)
- Fibrinogen-Binding Inhibitor Peptide (CAS 89105-94-2)
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