its a little bigger than that, the brake clean can potentially create a toxic gas, the guy in that article only inhaled a small amount of it and it caused permanent damage, he was lucky that it didn't kill him
just and FYI phosgene gas has an exposure limit of 1/10th of 1ppm or .1ppm
this is why they used it so extensively as a nerve agent in WWI and II. you wont know its there until you are breathing the stuff and by then you're in deep ****.