3-Methyl-1-pentyn-3-ol
ALDRICH/137561 - 98%
Synonym: Ethyl ethynyl methyl carbinol; Meparfynol
CAS Number: 77-75-8
Empirical Formula (Hill Notation): C6H10O
Molecular Weight: 98.14
EC Number: 201-055-5
MDL Number: MFCD00004479
Linear Formula: CH≡CC(OH)(CH3)CH2CH3
Product Type: Chemical
| assay | 98% |
| bp | 121-122 °C (lit.) |
| density | 0.866 g/mL at 25 °C (lit.) |
| form | liquid |
| functional group | hydroxyl |
| InChI | 1S/C6H10O/c1-4-6(3,7)5-2/ |
| InChI key | QXLPXWSKPNOQLE-UHFFFAOYSA |
| Quality Level | 100 ![]() |
| refractive index | n |
| SMILES string | CCC(C)(O)C#C |
| solubility | acetone: miscible |
| benzene: miscible | |
| carbon tetrachloride: miscible | |
| Cellosolve: miscible | |
| cyclohexanone: miscible | |
| diethyl ether: soluble | |
| diethylene glycol: miscible | |
| ethanolamine: miscible | |
| ethyl acetate: miscible | |
| kerosene: miscible | |
| mineral spirits: miscible | |
| neatsfoot oil: miscible | |
| petroleum ether: miscible | |
| soybean oil: miscible | |
| Stoddard solvent: miscible | |
| vapor density | 3 (vs air) |
| vapor pressure | 6.5 mmHg ( 20 °C) |
| Application: | 3-Methyl-1-pentyn-3-ol is propargyl alcohol that can be used as: • A reactant to synthesize α-methylene cyclic carbonates by reacting with carbon dioxide. • A reactant in the synthesis of 2,6,9-trisubstituted purine based CDK inhibitors. • An initiator in the synthesis of polylactide bearing terminal propargyl group via ring-opening polymerization of |
| Biochem/physiol Actions: | 3-Methyl-1-pentyn-3-ol is a sedative and induces hepatic P4503A in mouse. |
| General description: | 3-Methyl-1-pentyn-3-ol acts as initiator during the synthesis of propargyl-terminated polylactide by bulk ring-opening polymerization. |
| Packaging: | 100 mL in glass bottle |
| Symbol | ![]() GHS02,GHS07 |
| Signal word | Warning |
| Hazard statements | H226 - H302 |
| Precautionary statements | P210 - P301 + P312 + P330 |
| Hazard Codes | Xn |
| Risk Statements | 10-22 |
| Safety Statements | 23-36 |
| RIDADR | UN 1986 6.1(3) / PGIII |
| WGK Germany | WGK 2 |
| Flash Point(F) | 82.4 °F - closed cup |
| Flash Point(C) | 28 °C - closed cup |
| Purity | 98% |
| bp | 121-122 °C (lit.) |
| Density | 0.866 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352100 |



