My Lords, a widely used plastic material is PVC--polyvinyl chloride--of which I am sure the noble Earl will have heard. When it is desirable for it to be softened so that it can be used for toys or, as I said, for dummies, then a plasticiser is used; namely, a phthalate. That is what the Question addresses.
Perhaps I may at this point give the noble Countess, Lady Mar, a further answer to her question. I am advised that DINP has no oestrogenic effect.