Sometimes those who fill out EPA SARA 311 / 312 reports know absolutely nothing of their business, the chemistry, and unfortunately the risk of their business.
Anhydrous ammonia isn’t the kind of ammonia you get in Mr. Clean, or whatever.
It is basically that same Mr. Clean without the water.
Buddy of mine grew up in Kansas and they use it as fertilizer by pumping it into the soil.
Put simply, the stuff is deadly. A lungful of that and you are at serious risk of taking a dirt nap!