(E)-4-(4-chlorophenyl)-2-oxobut-3-enoic acid CAS 33185-97-6
| CAS No. | 33185-97-6 |
| Molecular Formula | C10H7ClO3 |
| Molecular Weight | 210.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(E)-4-(4-chlorophenyl)-2-oxobut-3-enoic acid (CAS 33185-97-6) is a high-purity analytical reference standard with the molecular formula C10H7ClO3 and a molecular weight of 210.61 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, (E)-4-(4-chlorophenyl)-2-oxobut-3-enoic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 210.61 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).
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), (E)-4-(4-chlorophenyl)-2-oxobut-3-enoic acid 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 | C10H7ClO3 |
| Molecular Weight | 210.61 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
Related E Standards
- (E)-4-(3-chlorophenyl)-2-oxobut-3-enoic acid (CAS 1244025-00-0)
- 4-Chlorophenyl sulfofluoridate (CAS 1535-33-7)
- 4-(3-Chlorophenyl)-4-oxo-2-butenoic Acid (CAS 191015-04-0)
- (E)-4-(4-Chlorophenyl)-2-oxobut-3-enoic acid (CAS 42393-06-6)
- 3-(2-Chlorophenyl)dihydro-2,5-furandione (CAS 66041-30-3)
- 3-(4-Chlorophenyl)oxolane-2,5-dione (CAS 776-52-3)
- (E)-4-(4-chlorophenyl)-4-oxobut-2-enoic acid 3-(4-Chlorobenzoyl)acrylic acid 6269-33-6 (CAS 6269-33-6)
- [3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl]methanol (CAS 1153452-00-6)
Recommended Standards
- (6-Chloro-benzofuran-3-yl)-acetic acid (CAS 947012-80-8)
- 6-Chloro-4-hydroxy-3-methyl-2H-chromen-2-one (CAS 197504-51-1)
- 2-(2-Chloro-2,2-difluoroacetyl)cyclohexan-1-one (CAS 2343-34-2)
- 6-Chloro-4-methylumbelliferone (CAS 19492-02-5)
- 1,2,3-Trichloro-6-fluorodibenzo[b,d]furan (CAS 669767-00-4)
- N-(tert-butyl)-2,6-dichloronicotinamide (CAS 1334612-24-6)
- 2-Chloro-4-(chloromethyl)pyridine hydrochloride (CAS 117934-37-9)
- 3-Cyclopropoxy-5-(trifluoromethyl)pyridin-4-amine (CAS 1243443-68-6)
- 4-Bromophenyl pivalate (CAS 63549-55-3)
- 2(3H)-Furanone, 5-(6-hepten-1-yl)dihydro- (CAS 854737-08-9)
- Cephacetrile Impurity 4 (CAS CATO-C4X-23114)
- methyl 7-fluoro-1,5-naphthyridine-4-carboxylate (CAS 2757817-31-3)
- 5-Chloro-1-propylindoline-2,3-dione (CAS 689759-69-1)
- ((Cys31,Nva34)-Neuropeptide Y (27-36))2 (CAS 172997-92-1)
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