When mixed with readily combustible material, such as sulfur and many forms Of organic matter, the sensitivity Of ammonium nitrate to detonation is increased but not to an extent that creates an explosion hazard under ordinary conditions. The water-repellent coatings, which are organic in nature, increase the sensitivity somewhat and may lower the ignition temperature, but such coated material is safe to handle by Observance of the simme precautions noted in the next section.