Ammonium Nitrate

Another solid nitrogen product typically applied in granular form, ammonium nitrate (NH4NO3) does not have any reported occupational health problems. The dust arising from ammonium nitrate is of low toxicity and is generally regarded as a nuisance dust; 10 mg/m3 (for an 8-hour exposure) is accepted as the permitted level provided the particle size is above 5 fm. Ammonium nitrate may decompose in a fire, and storage areas should be suitably designed for the presence of combustible material with easy access to stacks of bags, with spacing between stacks. Oxides of nitrogen are emitted during decomposition of ammonium nitrate (14).

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