3,3',4,5,5'-Pentabromobiphenyl CAS 81902-33-2
| CAS No. | 81902-33-2 |
| Molecular Formula | C12H5Br5 |
| Molecular Weight | 548.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,3',4,5,5'-Pentabromobiphenyl (CAS 81902-33-2), molecular formula C12H5Br5 and molecular weight 548.69 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, an aromatic ring system, 3,3',4,5,5'-Pentabromobiphenyl is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 548.69 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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), 3,3',4,5,5'-Pentabromobiphenyl 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 | C12H5Br5 |
| Molecular Weight | 548.69 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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.) | 1980 |
| Halogen Content | Br-containing |
Related Pentabromobiphenyl Standards
Recommended Standards
- Dicyclohexyl 2,2'-((((((2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)oxy)carbonyl)(methyl)amino)thio)azanediyl)diacetate (CAS 82560-38-1)
- Ruxolitinib Impurity 202 (CAS 3016399-18-8)
- Lefamulinum Impurity 44 (CAS CATO-C4X-304744)
- N1,N1'-([1,1'-Biphenyl]-4,4'-diyl)bis(N1-(4-aminophenyl)benzene-1,4-diamine) (CAS 3547-23-7)
- 5-Hydroxy-[1,1'-biphenyl]-3-carbonitrile (CAS 939771-50-3)
- Pentafluorophenyl 2-[4-(tert-butoxycarbonyl)piperazin-1-yl]isonicotinate (CAS 944450-81-1)
- 1-Benzyl-2,3-dioxopiperazine (CAS 63352-56-7)
- (R)-(5,6,7,8-Tetrahydroindolizin-8-yl)methanamine (CAS 288588-14-7)
- Phenyl 4-methoxypyridin-2-ylcarbamate (CAS 1989954-61-1)
- (E)-5-(3-hydroxy-4-methoxybenzylidene)-3-methyl-2-thioxothiazolidin-4-one (CAS 331261-30-4)
- (1-(Pyrrolidin-1-yl)cyclopropyl)methanamine dihydrochloride (CAS 2303565-80-0)
- N-(5-chloropyridin-2-yl)-5-methoxy-2-nitrobenzamide (CAS 280773-16-2)
- 3-Phenyl-1,4-thiazepane (CAS 1485107-76-3)
- Semaglutide Impurity 124 (CAS CATO-C4X-2226124)
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