3,4-Dichloro-1H-pyrrole-2,5-dione CAS 1193-54-0
| CAS No. | 1193-54-0 |
| Molecular Formula | C4HCl2NO2 |
| Molecular Weight | 165.96 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,4-Dichloro-1H-pyrrole-2,5-dione (CAS 1193-54-0) is a high-purity analytical reference standard with the molecular formula C4HCl2NO2 and a molecular weight of 165.96 g/mol.
Based on its molecular formula C4HCl2NO2, 3,4-Dichloro-1H-pyrrole-2,5-dione contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 165.96 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C4HCl2NO2 |
| Molecular Weight | 165.96 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Dichloro Standards
- 3,5-Dichloro-2H-1,4-oxazin-2-one (CAS 125850-02-4)
- 2,5-Dichloro-3-fluoropyridine (CAS 103999-77-5)
- 2,3-Dichloro-4-fluoropyridine (CAS 1211586-65-0)
- 2,5-dichloro-4-fluoropyridine (CAS 1214350-63-6)
- 4,5-Dichloro-2-fluoropyridine (CAS 1214359-76-8)
- 2,3-Dichloro-5-fluoropyridine (CAS 185985-40-4)
- 2,4-Dichloro-5-fluoropyridine (CAS 189281-48-9)
- 2,3-Dichloro-6-fluoropyridine (CAS 51991-32-3)
Recommended Standards
- 3-Chloroisoxazole-5-carbonyl chloride (CAS 104164-45-6)
- (3-Fluoro-5-vinylphenyl)boronic acid (CAS 1232836-03-1)
- 3-Bromo-5-fluoro-4H-1,2,4-triazole (CAS 42297-30-3)
- silver thiocyanate (CAS 1701-93-5)
- [2-(Acetyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid (CAS 1353985-87-1)
- Tert-butyl (S)-(1-(5-fluoropyrimidin-2-yl)ethyl)carbamate (CAS 905587-30-6)
- 5,7-Dibromoisoquinoline (CAS 2137673-43-7)
- 2-((5-(2-Bromophenyl)-1,3,4-oxadiazol-2-yl)thio)-N-(4-phenoxyphenyl)acetamide (CAS 332154-67-3)
- 1-(2-Bromo-3-(trifluoromethoxy)phenyl)ethanone (CAS 1588441-04-6)
- Penehyclidine Impurity N1 (CAS 87827-02-9)
- 2-Chloro-3-[4-(3-methylpiperidine-1-carbonyl)piperidin-1-yl]-1,4-dihydronaphthalene-1,4-dione (CAS 439108-69-7)
- N-(3-Chlorophenyl)-4-(4-cyanophenyl)tetrahydro-1(2H)-pyrazinecarboxamide (CAS 478046-91-2)
- 5-(((4-Bromophenyl)thio)methyl)-1-methyl-3-(trifluoromethyl)-1H-thieno[2,3-c]pyrazole (CAS 478031-75-3)
- Semaglutide Impurity 121 X Sodium Salt (CAS CATO-C4X-2226121)
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