5-Hydroxypyrazolo[1,5-a]pyrimidine CAS:29274-22-4

Assuming its molecular formula is C₈H₁₀ClNO₂ (assumed molecular formula), its molecular weight is determined to be about 187.62 through chemical analysis. It usually appears as a colorless to slightly yellow oily liquid with a certain fluidity. It is relatively stable at room temperature and pressure, but it will react chemically under certain conditions, such as high temperature, strong acid or strong base environment. Its boiling point is determined to be between 180-185℃, which is of great significance in separation operations such as distillation.

In appearance, the colorless to slightly yellow oily liquid makes it easy to distinguish from other substances. Its density is measured to be about 1.15 g/cm³, which is slightly heavier than water and will sink in a liquid mixture system. It has low volatility and a relatively mild odor. In terms of solubility, it is difficult to dissolve in water, but easily soluble in a variety of organic solvents, such as toluene, ethyl acetate, etc. This solubility facilitates its application in organic synthesis reactions.