Benjamin Moore has a low odor paint which I believe is less toxic though probably not pure. When we built our house we painted with an alternative non-toxic paint. I tell you the stuff smelled strong and the smell lasted far longer than conventional paint. It really bothered me.
My folks just painted with Benjamin Moore low odor and I could barely smell it. If they hadn't mentioned they had painted I wouldn't have known by the smell. Here's a brief article I found: