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| | 3-Methyl-1-pentyn-3-ol Basic information |
| | 3-Methyl-1-pentyn-3-ol Chemical Properties |
| Melting point | -30 °C | | Boiling point | 121-122 °C(lit.) | | density | 0.866 g/mL at 25 °C(lit.) | | vapor density | 3 (vs air) | | vapor pressure | 6.5 mm Hg ( 20 °C) | | refractive index | n20/D 1.431(lit.) | | Fp | 80 °F | | storage temp. | Flammables area | | solubility | Cellosolve: miscible | | pka | 13.34±0.29(Predicted) | | form | clear liquid | | color | Colorless to Light yellow | | explosive limit | 1.8-16.0%(V) | | Merck | 13,5870 | | BRN | 969340 | | Henry's Law Constant | 9.9×10-1 mol/(m3Pa) at 25℃, Hilal et al. (2008) | | CAS DataBase Reference | 77-75-8(CAS DataBase Reference) | | NIST Chemistry Reference | Meparfynol(77-75-8) | | EPA Substance Registry System | 3-Methyl-1-pentyn-3-ol (77-75-8) |
| Hazard Codes | Xn,F+ | | Risk Statements | 10-22-51/53-2017/10/22 | | Safety Statements | 23-36-61 | | RIDADR | UN 1986 3/PG 3 | | WGK Germany | 1 | | RTECS | SC4900000 | | TSCA | TSCA listed | | HazardClass | 3 | | PackingGroup | III | | HS Code | 29052990 | | HS Code | 29280090 | | Toxicity | LD50 orally in mice, rats, guinea pigs: 600-900 mg/kg (Margolin) |
| | 3-Methyl-1-pentyn-3-ol Usage And Synthesis |
| Chemical Properties | Clear slightly yellow liquid or low melting solid | | Originator | Citodorm,Haury | | Uses | 3-Methylpent-1-yn-3-ol is an inhibitor; used in method for preparing high-insulation solvent-free silicone resin for composite insulator. | | Uses | Stabilizer in chlorinated solvents, viscousreducer, electroplating brightener, intermediate insyntheses of hypnotics and isoprenoid chemicals,solvent for polyamide resins, acid inhibitor, preven-tion of hydrogen embrittlement, medicine (soporificand anesthetic). | | Definition | ChEBI: Methylpentynol is a ynone. | | Manufacturing Process | To 5 parts of sodium acetylene in absolute ether 6 parts of dry methyl ethyl ketone was slowly dropwise added with ice cooling and stirring. Than the reaction mixture was poured into excess of acetic acid by ice cooling and extracted with ether. The ether extract was washed with solution of potash for removing the diluted acetic acid and dried over potassium carbonate. The ether was distilled off and residual colorless oil methylpentynol had BP at 120°-121°C. Instead of sodium acetylene the solution of sodium acetylene in liquid ammonia may be successfully used. | | Brand name | Dormison (Schering). | | Therapeutic Function | Sedative | | Hazard | Moderate fire risk. Toxic. |
| | 3-Methyl-1-pentyn-3-ol Preparation Products And Raw materials |
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