2-Pentynoic Acid CAS 5963-77-9
| CAS No. | 5963-77-9 |
| Molecular Formula | C5H6O2 |
| Molecular Weight | 98.10 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 2-Pentynoic Acid.
2-Pentynoic Acid (CAS 5963-77-9), molecular formula C5H6O2 and molecular weight 98.10 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H6O2, 2-Pentynoic Acid contains a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 98.10 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).
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 2-Pentynoic 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 | C5H6O2 |
| Molecular Weight | 98.10 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C |
| 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.) | 1958 |
Related Pentynoic Standards
- 3-Pentynoic Acid (CAS 36781-65-4)
- 6089-09-4 4-Pentynoic acid Pent-4-ynoic acid 4-02-00-01693 (Beilstein Handbook Reference) BRN 1742047 EINECS 228-028-0 Pent-4-yn-1-oic acid Propargylacetic acid (CAS 6089-09-4)
- 2-Pentynoic Acid Methyl Ester (CAS 24342-04-9)
- 3-Pentynoic Acid Methyl Ester (CAS 22377-43-1)
- 4-Pentynoic Acid Methyl Ester (CAS 21565-82-2)
- 3-Pentynoic Acid Ethyl Ester (CAS 52750-56-8)
- 4-Pentynoic Acid Ethyl Ester (CAS 63093-41-4)
Recommended Standards
- α-Methylene-γ-butyrolactone (stabilized with 2,6-Di-tert-butyl-p-cresol) (CAS 547-65-9)
- 52867-35-3 1-Methyl-1H-pyrazol-3(2H)-one DTXSID90465321 (CAS 52867-35-3)
- (Ethoxycarbonyl)acetylene 2-Propynoic acid, ethyl ester 623-47-2 Ethyl 2-propynoate Ethyl acetylenecarboxylate Ethyl propiolate Ethyl propynoate NSC-60551 NSC60551 Propiolic acid, ethyl ester (CAS 623-47-2)
- 2-(Acetamido)acetonitrile 4814-80-6 AAN Aceturic acid nitrile N-(Cyanomethyl)acetamide (CAS 4814-80-6)
- 2,6-Dimethyl-3-nitropyridine (CAS 15513-52-7)
- 3-Amino-4-methyl-1-(4-(methylsulfonyl)phenyl)-1H-pyrazol-5(4H)-one (CAS 31522-06-2)
- 2,4-Difluoro-6-methylaniline (CAS 1464825-76-0)
- 2-Methoxy-3,5,6-trimethylpyrimidin-4(3H)-one (CAS 94815-77-7)
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- 5-Isopropyl-1-(2,2,2-trifluoroethyl)-1h-1,2,3-triazole-4-carboxylic acid (CAS 1249152-67-7)
- 2-(4-chlorobutyl)-1,3-dioxolane (CAS 118336-86-0)
- 2-Methyl-4-(4-pentylbenzoyl)pyridine (CAS 1187164-74-4)
- 2-(Difluoromethyl)-4,5-dimethoxy-3-methylpyridine (CAS 1804695-64-4)
- Liraglutide Impurity 16 TFA Salt (CAS CATO-C4X-199216)
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