Methanol, English name methyl alcohol; Methanol, alias: wood alcohol
Molecular formula CH4O; CH3OH Molecular weight: 32.04
Characteristics: Appearance and properties: colorless clarified liquid with irritating odor Flash point: 11°C; vapor pressure: 13.33 kpa/21.2°C; boiling point: 64.8°C Solubility: soluble in water, miscible in most organic solvents such as alcohols and ethers Density: relative density (water = 1) 0.79; relative density (air = 1) 1.11
Technical specifications:
Indicator name | Superior | First Class | Qualified Products |
Chromaticity, Hazen units (Pt-Co colour code) ≤ | 5 | 10 | |
Density, ρ20 (g/cm3) | 0.791~0.792 | 0.791~0.793 | |
Boiling range (0°C,101.3kPa) /°C ≤ | 0.8 | 1.0 | 1.5 |
Potassium permanganate test min≥ | 50 | 30 | 20 |
Water miscibility test | Through experiments(1+3) | Through experiments(1+9) | --- |
Water, ω% ≤ | 0.10 | 0.15 | 0.20 |
Acidity (as HCOOH) ω%≤ | 0.0015 | 0.0030 | 0.0050 |
or alkalinity (as NH3) ω﹪, ≤ | 0.0002 | 0.0008 | 0.0015 |
Carbonyl compounds in (HCHO), ω% ≤ | 0.002 | 0.005 | 0.010 |
Evaporation residues,ω% ≤ | 0.001 | 0.003 | 0.005 |
Sulphuric acid wash test, Hazen unit (Pt-Co colour code) ≤ | 50 | — | |
Ethanol,ω% ≤ | Negotiations between supply and demand | — |