trimethylsilanol is a volatile organic liquid with a boiling point of 98 °c. the heat of evaporation is 45.64 kj·mol, the evaporation entropy 123 j·k·mol. the vapor pressure function according to antoine is obtained as log(p) = a−(b/(t+c)) (p in bar, t in k) with a = 5.44591, b = 1767.766 and c = -44.888 in a temperature range from 291 k to 358 k. below the melting point at -4.5 °c, the compound solidifies in a monoclinic crystal lattice. trimethylsilanol is a weak acid with a pk value of 11. the acidity is comparable to that of orthosilicic acid, but much higher than the one of alcohols like "tert"-butanol (pk 19).