You might like to look at AEMSA - the American E-Liduid Standards Association: AEMSA | American E-Liquid Manufacturing Standards Association
It's a volunteer organization for standards in manufacturing e-liquid. it hasn't been going very long yet.
Members list is here: MEMBERS | AEMSA
I've only bought from one vendor on that list - and they are a supplier not a manufacturer. I buy from good vendors with a good reputation. And good juice of course. But if you're worried about certain things you can see there what the health and safety standards are for the AEMSA members.
It's a volunteer organization for standards in manufacturing e-liquid. it hasn't been going very long yet.
Members list is here: MEMBERS | AEMSA
I've only bought from one vendor on that list - and they are a supplier not a manufacturer. I buy from good vendors with a good reputation. And good juice of course. But if you're worried about certain things you can see there what the health and safety standards are for the AEMSA members.