5-Ethynyl-2-methylphenol CAS 99595-47-8
| CAS No. | 99595-47-8 |
| Molecular Formula | C9H8O |
| Molecular Weight | 132.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Ethynyl-2-methylphenol is closely related to a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 5-Ethynyl-2-methylphenol (CAS 99595-47-8), a certified reference material (molecular formula C9H8O, MW 132.16 g/mol) for analytical method development and quality control.
Structurally, 5-Ethynyl-2-methylphenol (C9H8O) contains a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 132.16 g/mol, it falls into the low-molecular-weight range. 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), 5-Ethynyl-2-methylphenol 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 | C9H8O |
| Molecular Weight | 132.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
Related Ethynyl Standards
- 5-Ethynyl-N-methylpyridin-2-amine (CAS 1056186-07-2)
- 5-Ethynyl-2-methylpyridin-3-amine (CAS 1211537-42-6)
- 2-Ethynyl-3,5-dimethylpyrazine (CAS 1374115-63-5)
- 2-Ethynyl-5-methylpyridin-3-amine (CAS 1394319-72-2)
- 2-Ethynyl-N-methylpyridin-4-amine (CAS 1565430-52-5)
- 6-Ethynyl-4-methylpyridin-2-amine (CAS 1582754-31-1)
- 5-Ethynyl-4-methylpyridin-2-amine (CAS 179555-05-6)
- 2-Ethynyl-5-methylphenol (CAS 1822650-88-3)
Recommended Standards
- 5-Ethylnicotinonitrile (CAS 61391-07-9)
- 5-Ethynyl-2-methylpyridin-4-amine (CAS 960412-80-0)
- 5-Amino-2-methylbenzonitrile (CAS 50670-64-9)
- 5-Ethynyl-6-methylpyridin-2-amine (CAS 936344-80-8)
- 4-Chloro-6,6,8-trimethyl-5,6-dihydroquinazoline (CAS 1256784-31-2)
- [(4-bromo-2-fluorophenyl)methyl][2-(4-methylpiperazin-1-yl)ethyl]amine (CAS 1183009-18-8)
- (3,5-dichlorophenyl)methanamine hydrochloride (CAS 78335-91-8)
- (1S,4S)-2-oxa-5-azabicyclo[2.2.2]Octane hemioxalate (CAS 2306255-62-7)
- 2,5-Di(pyrrolidin-1-yl)cyclohexa-2,5-diene-1,4-dione (CAS 1521-03-5)
- 3-Hydroxy-4-methoxy-d (CAS 74495-73-1)
- 4-Ethoxy-6-(piperazin-1-yl)pyrimidine hydrochloride (CAS 1185310-50-2)
- 5-Amino-6-chloro-2-propylpyrimidine-4(1H)-thione (CAS 61457-05-4)
- Ethyl 5-hydroxy-7-oxo-2,8-diphenyl-7,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylate (CAS 76360-75-3)
- Tirzepatide Impurity 12 (CAS CATO-C4X-324012)
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