Testing Methods for the Hydroxyl Value of Hydroxyethyl Acrylate
Common methods for evaluating the hydroxyl value of hydroxyethyl acrylate are the oxidation method and the acid value method.
The oxidation method involves reacting hydroxyethyl acrylate with excess potassium iodide. Under the catalysis of potassium iodide and acid, the hydroxyl groups in hydroxyethyl acrylate are oxidized to aldehyde groups, and the hydroxyl value is calculated using the remaining amount of potassium iodide.
The acid value method utilizes the acid-base reaction between hydroxyl groups in hydroxyethyl acrylate and phenolphthalein indicator, and the hydroxyl value is calculated by titrating the amount of acid.

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