Ammonia gas is lighter than air and will rise however in the presence of moisture (such as high relative humidity).
Carbon Dioxide (CO2) occurs naturally in the environment, if you use Oxygen to breath as a plant or animal then you also exhale CO2.
Carbon Monoxide (CO) is a highly poisonous gas in low concentrations. The fact it has no taste or smell makes it especially dangerous.
Chlorine is a toxic gas greenish yellow gas with a characteristic odour. It combines directly with nearly all elements.
Ethylene (C2H4) is a colourless gas which is highly flammable with a Lower Explosive Limit of 2.7% in air.
Ethylene oxide (C2H4O) is a flammable, colourless gas at temperatures above 10.7 Degrees Centigrade C that smells like ether at toxic levels.
Many gases and vapours when mixed in the correct proportion with an oxidant, normally air, will ignite.
Formaldehyde is a colourless, strong-smelling gas often found in aqueous (water- based) solutions commonly used as a preservative in medical laboratories and mortuaries.
Hydrogen Chloride (HCL) is a colourless, highly toxic gas with a strong odour. HCL is also highly corrosive. HCL is readily dissolves in water to give Hydrochloric acid.
Hydrogen Cyanide (HCN) is a colourless gas that smells slightly of almonds. It is extremely poisonous.
Hydrogen Fluoride(HF) is a colourless gas, with a pungent odour at 0.04ppm and causes eye irritation and throat irritation at 3 ppm.
Hydrogen Sulphide(H2S) is a colourless gas with a characteristic rotten eggs odour, it is also highly poisonous.
Nitric Oxide (NO2), or nitrogen oxide also known as nitrogen monoxide, is a molecule with the chemical formula NO.
Nitrogen Dioxide (NO2) is an extremely toxic gas, readily detected by its acrid Chlorine like smell at low concentrations.
Nitrous Oxide is also known as ‘laughing gas’ due to its euphoric effect when inhaled. It is commonly used in surgery and dentistry.
Oxygen (O2) is one of the main components for air and occurs normally at 20.9% in the atmosphere at sea level.
Ozone is a pale blue gas with a distinctively pungent smell. Ozone gas is a powerful oxidant and has many industrial and consumer applications related to oxidation.
Silane (SiH4) is a colourless, flammable gas with a sharp, repulsive smell similar to that of acetic acid.
Sulphur dioxide is a colourless gas with an irritating pungent odour. It readily dissolves in water.
Volatile organic compounds (VOC’s) are organic chemicals that have a high vapour pressure at ordinary room temperature.
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