One of my first graduate tasks in a previous life involved managing the impact of switching to phthalate-free flexible tubing. We went nowhere near biological s

One of my first graduate tasks in a previous life involved managing the impact of switching to phthalate-free flexible tubing. We went nowhere near biological systems but were struggling to get hold of the stuff anyway. It got to the point we were redesigning components to take into account vastly decreased maintenance intervals. Whilst I don't want to defend the plastics industry, I have to find my delivery today funny: a small plastic part carrying a prop 65 warning. The part is made of polyacetal, and so contains no flourine, amine or cyano groups, no aromatics, not even a double bond. How?!