Cinnamic acid (Cinnamic Acid), as a common organic compound, its molecular weight (Molecular Weight) is of great significance in the field of chemical research.

The molecular weight of cinnamic acid has been accurately calculated to be about 148.16 g/mol. This value is not derived from thin air, but is actually obtained by summing the relative atomic masses of each atom in its molecular structure. The chemical formula of cinnamic acid is C H O ², in which the relative atomic mass of carbon (C) is about 12.01, hydrogen (H) is about 1.01, and oxygen (O) is about 16.00. According to its chemical formula, the sum of the masses of nine carbon atoms is 9 × 12.01 = 108.09, the sum of the masses of eight hydrogen atoms is 8 × 1.01 = 8.08, and the sum of the masses of two oxygen atoms is 2 × 16.00 = 32.00. Add the three together: 108.09 + 8.08 + 32.00 = 148.17, which is about 148.16 g/mol.

Knowing the molecular weight of cinnamic acid is quite beneficial in many chemical practices. In the field of organic synthesis, the amount of reactants and products can be accurately calculated based on this to ensure that the reaction proceeds efficiently in the expected direction and improve the purity and yield of the product. In analytical chemistry, with the help of molecular weight data, compounds containing cinnamic acid can be accurately identified by means such as mass spectrometry, and their content in mixtures can also be determined. In addition, in pharmaceutical chemistry research, molecular weight is a key parameter for considering the molecular properties of drugs, which affects the solubility, permeability and biological activity of drugs, and is of great significance for the development of new drugs based on cinnamic acid or containing cinnamic acid structures.