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Menthol may also enhance the activity of glycine receptors and negatively modulate 5-HT 3 receptors and nAChRs. [11] Menthol is widely used in dental care as a topical antibacterial agent, effective against several types of streptococci and lactobacilli. [12] Menthol also lowers blood pressure and antagonizes vasoconstriction through TRPM8 ...
Menthone is a liquid under standard conditions, and has a density of 0.895 g/cm 3. [citation needed] Under the same conditions, [verification needed] the melting point is −6 °C, and its boiling point is 207 °C.
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 atmosphere or 100 kPa.
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Cresols commonly occur as either solids or liquids because their melting points are generally close to room temperature. Like other types of phenols, they are slowly oxidized by exposure to air , and the resulting impurities often give the samples a yellow to brownish red tint.
Methanol for chemical use normally corresponds to Grade AA. In addition to water, typical impurities include acetone and ethanol (which are very difficult to separate by distillation). UV-vis spectroscopy is a convenient method for detecting aromatic impurities. Water content can be determined by the Karl-Fischer titration.
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.