Anhydrous ammonia (NH3) is the perfect example of something that's commonly found in agriculture, but is also really dangerous. Because it's so common, people grow very comfortable using and being around it and forget that it's a hazardous chemical.
Anhydrous ammonia causes serious injuries, like severe frostbite, serious burns, blindness, suffocation or lung damage, and even death, all in a matter of seconds. Many injuries can be avoided by properly handling the product and respecting it each and every time you work with it. Personal protection is the responsibility of the employer and the employee.