Q&A: Is allantoin amphoteric? What’s an isoelectric point? Can we use it in anionic products?

Let’s continue with Mia Makes Things’ questions about using Germaben II in products and her third question about allantoin: The closest thing I’ve found is Sepimax ZEN, a gel former, which is anionic. And even then, as an anionic ingredient it prohibits the use of the cationic (at typical pH) allantoin. Which pretty much defeats my…