Pent-4-ynoyl chloride CAS 55183-44-3
| CAS No. | 55183-44-3 |
| Molecular Formula | C5H5ClO |
| Molecular Weight | 116.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Pent-4-ynoyl chloride is closely related to a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Pent-4-ynoyl chloride (CAS 55183-44-3), a certified reference material (molecular formula C5H5ClO, MW 116.55 g/mol) for analytical method development and quality control.
Pent-4-ynoyl chloride (C5H5ClO) contains a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C5H5ClO |
| Molecular Weight | 116.55 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
Related Pent Standards
- Pent-2-ynoyl chloride (CAS 116428-99-0)
- Pent-4-ene-1,2-diol (CAS 103625-11-2)
- (2E)-Pent-2-enoyl chloride (CAS 33698-85-0)
- Pent-4-enehydrazide (CAS 86538-23-0)
- Pent-1-en-1-ylboronic acid (CAS 104376-24-1)
- (pent-4-en-1-yl)boronic acid (CAS 886747-03-1)
- Pent-4-ynehydrazide (CAS 114578-39-1)
- Methyl pent-4-ynimidate (CAS 624728-35-4)
Recommended Standards
- 5-Chloro-1-methylimidazole (CAS 872-49-1)
- Penta-2,4-dienoyl chloride (CAS 20448-91-3)
- 5-Chloro-1-methyl-1H-pyrazole (CAS 42110-76-9)
- 23785-22-0 4-(chloromethyl)-1H-imidazole 4-Chloromethyl-1H-imidazole A4961 (CAS 23785-22-0)
- 2-(2-(4,5-Diphenyloxazol-2-yl)hydrazono)acetic acid (CAS 85044-92-4)
- 3-(5-Isopropyl-2-methylphenoxy)pyrrolidine hydrochloride (CAS 1220033-66-8)
- (3-(Diethylcarbamoyl)-5-fluorophenyl)boronic acid (CAS 871332-64-8)
- (S)-2-(2-fluoro-6-methylphenyl)pyrrolidine (CAS 1270111-19-7)
- EThyl 3-[(4-bromophenyl)formamido]propanoate (CAS 1286980-74-2)
- 3-Benzyl-5-[(1E)-{[(3-chlorophenyl)methoxy]imino}methyl]-4-hydroxy-1-[2-(1H-imidazol-4-yl)ethyl]-1,2-dihydropyridin-2-one (CAS 477888-15-6)
- Ethyl 2-amino-5,5,7,7-tetramethyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate (CAS 133894-40-3)
- 1-(4-Fluorophenyl)-2-((1-methyl-1h-imidazol-2-yl)thio)propan-1-one (CAS 1154195-26-2)
- 4-Fluoro-2-vinylphenol (CAS 1295507-13-9)
- Biotinyl-CBP501 Affinity Peptide trifluoroacetate salt (CAS 2022956-39-2)
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