T1 Ammonia Health and Safety Guide - Health and Safety Guide 37
A1 United Nations Environment Programme, 
A1 World Health Organization, 
A1 International Labour Organisation, 
K1 health
K1 chemical
K1 ammonia
K1 health hazard
K1 waste disposal
SN 92 4 1510374
YR 1990
FD 1990
LK https://wedocs.unep.org/handle/20.500.11822/29582
UL https://wedocs.unep.org/handle/20.500.11822/29582
NO Ammonia is a colourless acrid-smelling gas at room temperature and normal atmospheric pressure. Most people can identify its odour at 35 mg/rn3 in air. It can be stored and transported as a liquid at a pressure of 10 atmospheres at 25 °C. Spilled liquid ammonia boils immediately, cooling its surroundings as it vaporizes. The gas dissolves readily in water; in solution it forms, and is in equilibrium with, ammonium ions (NH4 ). Ammonia solutions are alkaline and react with acids to form ammonium salts.
DS UN Environment Document Repository
RD Sep 16, 2026