1H,1'H-[3,3'-Bipyrrole]-2,2',5,5'-tetraone CAS 877220-92-3
| CAS No. | 877220-92-3 |
| Molecular Formula | C8H4N2O4 |
| Molecular Weight | 192.13 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.
1H,1'H-[3,3'-Bipyrrole]-2,2',5,5'-tetraone (CAS 877220-92-3), molecular formula C8H4N2O4 and molecular weight 192.13 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 1H,1'H-[3,3'-Bipyrrole]-2,2',5,5'-tetraone is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 192.13 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C8H4N2O4 |
| Molecular Weight | 192.13 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Recommended Standards
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- 1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic Acid (CAS 26597-44-4)
- 3-Cyano-5-nitrobenzoic acid (CAS 98556-65-1)
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- n-(1-Methoxypropan-2-yl)-1h-imidazole-1-carboxamide (CAS 1087788-32-6)
- 1-(3,5-Dimethyl-5-(methylamino)-4,5-dihydro-1H-pyrazol-1-yl)ethanone (CAS 175880-95-2)
- Dehydro Rac-Benidipine (CAS 121138-34-9)
- (R)-1-(3-(1,1-Difluoro-2-methoxy-2-methylpropyl)-2-fluorophenyl)ethan-1-amine (CAS 2842532-89-0)
- Methyl 3-hydroxy-5-isopropoxybenzoate (CAS 480465-09-6)
- 4-Nonylaniline (CAS 37529-29-6)
- Des-Lys20(Side Chain)-Semaglutide (CAS CATO-C4X-2226280)
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