4-Ethynyl-2-methylphenol CAS 99595-76-3
| CAS No. | 99595-76-3 |
| Molecular Formula | C9H8O |
| Molecular Weight | 132.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 132.16 g/mol gives 4-Ethynyl-2-methylphenol distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Ethynyl-2-methylphenol (CAS 99595-76-3), molecular formula C9H8O and molecular weight 132.16 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H8O, 4-Ethynyl-2-methylphenol contains a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 132.16 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).
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), 4-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
- 4-Ethynyl-2,6-dimethylpyrimidine (CAS 86521-00-8)
- 4-Ethynyl-3-methylphenol (CAS 408319-96-0)
- 4-Ethylpyridine-2-carbonitrile (CAS 92486-38-9)
- 4-Ethynylbenzene-1,2-diamine (CAS 58297-31-7)
- 1-(2-Aminoethyl)pyrrolidin-2-one oxalate (CAS 1392113-56-2)
- Quinoline-2-carboxylic acid hydrochloride (CAS 89047-45-0)
- Ethyl 3-bromo-4-(butylamino)benzoate (CAS 1131594-52-9)
- 2-Amino-2-(4-(tert-butyl)phenyl)propan-1-ol (CAS 187585-57-5)
- 1-(3-Fluorobenzoyl)-3-methylpiperazine (CAS 1240564-46-8)
- 4-Bromo-2-chloro-N,N-dimethyl-benzenemethanamine (CAS 1159976-87-0)
- N-(2-Methyl-4-nitrophenyl)ethane-1,2-diamine hydrochloride (CAS 27080-45-1)
- Octenyltrichlorosilane, isomer mixture (CAS 153447-97-3)
- 6-Bromo-3-(chloromethyl)-2-methylpyridine (CAS 1196157-21-7)
- [3,5 Diiodo-Tyr7] Peptide T (CAS 128551-40-6)
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