5-Ethynyl-2-methylbenzoic acid CAS 1878507-07-3
| CAS No. | 1878507-07-3 |
| Molecular Formula | C10H8O2 |
| Molecular Weight | 160.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Ethynyl-2-methylbenzoic acid (CAS 1878507-07-3), a certified reference material (molecular formula C10H8O2, MW 160.17 g/mol) for analytical method development and quality control.
5-Ethynyl-2-methylbenzoic acid (C10H8O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; 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).
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-Ethynyl-2-methylbenzoic 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 | C10H8O2 |
| Molecular Weight | 160.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
Related Ethynyl Standards
- 3-Ethynyl-4-methylbenzoic acid (CAS 1001203-03-7)
- 6-Ethynyl-2,3-dihydrobenzo[b][1,4]dioxine (CAS 1057670-26-4)
- 1-(5-Ethynyl-2-hydroxyphenyl)ethanone (CAS 1350803-03-0)
- 4-Ethynyl-3-methylbenzoic acid (CAS 1357281-69-6)
- 4-Ethynyl-2-methylbenzoic acid (CAS 1378843-72-1)
- 5-Ethynyl-2-methoxybenzaldehyde (CAS 142686-55-3)
- 2-Ethynyl-4-methylbenzoic acid (CAS 1471993-85-7)
- 3-Ethynyl-4-methoxybenzaldehyde (CAS 160625-49-0)
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- (S)-(1-Benzylpyrrolidin-2-yl)diphenylmethanol (CAS 118970-95-9)
- 6-Bromo-2-methylhex-1-ene (CAS 1974-89-6)
- 2-(3-(Trifluoromethyl)-1H-1,2,4-triazol-5-yl)ethan-1-amine (CAS 944906-71-2)
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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