PG - Propylene Glycol smells like... glue? A little bit chemical odor.

Hi,

I'm worried. I've been using this propylene glycol for months to make liquid for vaping. Now I've noticed that it smells like... glue? A bit chemical. Not that bad, just noticeable. I checked my old bottle from another supplier (not expired) and it smells the same. Why? Both are 99.5% Ph Eur./USP. Now I'm worried that I might hurt myself :( I feel fine. Of course I stopped using it. But what can happen to this glycol and can something happen to me, like... health problems?

Thanks <3