Melting point 34-36 °C(lit.) Boiling point 216 °C(lit.) Density 0.89 g/mL at 25 °C(lit.) vapor pressure 0.8 mm Hg ( 20 °C) FEMA 2665 | MENTHOL RACEMIC refractive index 1.4615 Flash point 200 °F storage temp. 2-8°C solubility Practically insoluble in water, very soluble in ethanol (96 per cent) and in light petroleum, freely soluble in fatty oils and in liquid paraffin, very slightly soluble in glycerol. InChIKey NOOLISFMXDJSKH-UHFFFAOYSA-N CAS DataBase Reference 15356-70-4(CAS DataBase Reference)
Usage And Synthesis Chemical Properties
Free-flowing or agglomerated, crystalline powder or prismatic or acicular, colourless, shiny crystals
Chemical Properties
Racemic menthol is a mixture of equal parts of the (1R,2S,5R)- and (1S,2R,5S)-isomers of menthol. It is a free-flowing or agglomerated crystalline powder, or colorless, prismatic, or acicular shiny crystals, or hexagonal or fused masses with a strong characteristic odor and taste. The crystalline form may change with time owing to sublimation within a closed vessel. The USP 32 specifies that menthol may be either naturally occurring l-menthol or syntheti-cally prepared racemic or dl-menthol. However, the JP XV and PhEur 6.0, along with other pharmacopeias, include two separate monographs for racemic and l-menthol.
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