Are you going to eat/wear it? It's not radioactive man, and if used as it is intended to, you won't have frequent contact with it... btw, almost any modern product has chemicals and substances in its production.
Quite frankly, we bought these for vacation....love them....so easy to use and you don't have to worry about getting your luggage at the airport ripped open by the TSA people.......and we weren't planning on eating them??
The voters in my beautiful California passed a ballot initiative a number of years ago requiring labels like the one you have probably seen on the packaging of the lock, to be put on products or in places where chemicals have been used that can cause such problems in lab tests. From luggage locks to high rise office building lobbies! The law is well intentioned but perhaps nobody realized just how widespread such chemicals are. Because California is such a gigantic market, I think manufacturers just put this warning on everything they make no matter where it will be sold in the USA. I've seen other alarmed amazoners but don't worry, nothing is going to harm you in a small lock.