(E)-4-chlorobut-2-enoic acid CAS 26340-58-9
| CAS No. | 26340-58-9 |
| Molecular Formula | C4H5ClO2 |
| Molecular Weight | 120.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), (E)-4-chlorobut-2-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.
(E)-4-chlorobut-2-enoic acid (CAS 26340-58-9) is a high-purity analytical reference standard with the molecular formula C4H5ClO2 and a molecular weight of 120.53 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, (E)-4-chlorobut-2-enoic acid is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 120.53 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H5ClO2 |
| Molecular Weight | 120.53 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 | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl-containing |
Related E Standards
- 4-chlorobut-2-enoic acid (CAS 16197-90-3)
- 2-Chlorobut-3-enoic acid (CAS 24253-33-6)
- 3-Chlorobut-2-enoic acid (CAS 55831-56-6)
- 4-Chlorobut-2-ynoic acid (CAS 13280-03-0)
- Methyl 4-chlorobut-2-ynoate (CAS 41658-12-2)
- (E)-4-Chlorobut-2-en-1-ol (CAS 1775-39-9)
- 4-Chlorobut-2-en-1-ol (CAS 7523-44-6)
- methyl 2-chlorobut-3-enoate (CAS 51171-63-2)
Recommended Standards
- oxetane-3-carbonyl chloride (CAS 1637758-08-7)
- 1-Chlorobutane-2,3-dione (CAS 5559-62-6)
- 2-Chloro-2-dioxene (CAS 57253-40-4)
- 2-Chlorocyclopropane-1-carboxylic acid (CAS 1258298-11-1)
- 2-Phenoxy-1-(2-((3-(trifluoromethyl)benzyl)thio)-4,5-dihydro-1H-imidazol-1-yl)ethan-1-one (CAS 851805-77-1)
- 2,6,10,14-Tetramethylheptadecane (CAS 18344-37-1)
- Rosmanol (CAS 80225-53-2)
- 3-(2,3-Dimethoxyphenyl)azetidin-3-ol (CAS 1388075-57-7)
- 4-Hydroxythieno[3,2-c]pyridine-7-carboxylic acid (CAS 55040-46-5)
- 3,3-Bis(2-chloro-6-fluorobenzyl)pentane-2,4-dione (CAS 400088-51-9)
- 2-(2-Fluoro-[1,1'-biphenyl]-4-yl)acetonitrile (CAS 69168-31-6)
- Methyl 4-isopropoxy-2-methylbenzofuran-6-carboxylate (CAS 1291492-86-8)
- Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluoroborate salt (CAS 1228149-03-8)
- Tirzepatide Impurity 48 (CAS CATO-C4X-324048)
Why CATO?
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