toothpaste or mouthwash. Potential degradation by sonication Wang et al. reported that aqueous solutions of poloxamer 188 and poloxamer 407 sonicated in the presence or absence of multi-walled carbon nanotubes (MWNTs) can become highly toxic to cultured cells. The toxicity correlated with the sonolytic degradation of the polymers. References External links ChemSub Online: Poloxamer 407 BASF Pharma Solutions: Poloxamers www.croda.com/healthcare/poloxamers Non-ionic surfactants