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Ammonia in its anhydrous (dry) form is a colourless gas at room temperature with a characteristic pungent, irritating odour usually detectable by smell at less than 5 ppm. It is easily liquefied under pressure and dissolves in water to form ammonium hydroxide (NH4OH). It burns in air to form nitric oxide (NO) and water.
Although it is a natural product of human, animal and plant metabolism, exposure to high concentrations can cause severe respiratory tract and eye irritation, even to the extent of causing temporary blindness. Its main industrial uses are as a refrigerant gas, in the production fertilisers and in the production of chemicals such as nitric acid, acrylonitrile and aniline.
> CAS No.: 7664-41-7
> Chemical Formula: NH3
> Vapour Density: 0.59 (air=1)
> Safe Work ES:
> Flammable Limits:
> Detectors Available: