5,5-dichloropenta-2,4-dienoic acid CAS 26561-48-8
| CAS No. | 26561-48-8 |
| Molecular Formula | C5H4Cl2O2 |
| Molecular Weight | 166.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5,5-dichloropenta-2,4-dienoic acid.
5,5-dichloropenta-2,4-dienoic acid (CAS 26561-48-8) is a high-purity analytical reference standard with the molecular formula C5H4Cl2O2 and a molecular weight of 166.99 g/mol.
Based on its molecular formula C5H4Cl2O2, 5,5-dichloropenta-2,4-dienoic acid contains 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 166.99 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 manufactures 5,5-dichloropenta-2,4-dienoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H4Cl2O2 |
| Molecular Weight | 166.99 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl-containing |
Recommended Standards
- 2,5-bis(chloromethyl)-1,3,4-oxadiazole (CAS 541540-90-3)
- 1-Bromo-4-hydroxy-2-butanone (CAS 1138728-96-7)
- 1,1-Cyclopropanedicarbonyl dichloride (CAS 34782-60-0)
- 3-bromo-5-methyl-1,2,4-oxadiazole (CAS 1228427-07-3)
- 2-(4-Chlorophenyl)-5-methyl-1,3-dioxan-5-amine (CAS 17144-46-6)
- 2-Bromo-4-(chloromethyl)-5-(difluoromethyl)-3-methylpyridine (CAS 1805931-77-4)
- Methoxyurea (CAS 3272-27-3)
- 4-Palmitamido-2,2,6,6-tetramethylpiperidine-1-oxyl (CAS 22977-65-7)
- N-((1H-Benzo[d]imidazol-2-yl)methyl)-3-(3,5-dimethylisoxazol-4-yl)propanamide (CAS 1061156-57-7)
- Methyl 2'-fluoro-2-(methoxymethyl)-[1,1'-biphenyl]-4-carboxylate (CAS 1243559-18-3)
- 4-(1-Hydroxyethyl)pyrazolidin-3-one (CAS 124667-24-9)
- benzyl (2S)-2-amino-3-(1H-imidazol-4-yl)propanoate;bis(4-methylbenzenesulfonic acid) (CAS 24593-59-7)
- (R)-2-(1-Hydroxyethyl)benzonitrile (CAS 1076195-46-4)
- Peptide YY (3-36) (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 126339-09-1)
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