Plasdone K-90 is a type of polymer that is soluble in water and there are many different names that it can go by as well. As a solid, it is typically a flaky white powder that is hygroscopic. It is most commonly used in the medical worked as a minder in a lot of pharmaceutical tablets. Additionally, it can be found and used in many technical industries such as an adhesive in glue sticks or even a thickening agent in tooth whitening gels. Lastly, it can also be used in molecular biology as a type of excellent absorbing agent in use of DNA purification.