Displaying 3 results of Polyquaternium Impurities Polyquaternium Impurities are undesirable substances that may be present in polyquaternium-containing products. These impurities can result from the manufacturing process or from degradation of the polymer during storage or use. Polyquaternium impurities can affect the stability, efficacy, and safety of products, and therefore need to be carefully monitored and controlled. Common polyquaternium impurities include residual monomers, unreacted reagents, and degradation products. Analytical techniques such as chromatography, spectroscopy, and microscopy can be used to detect and quantify these impurities.