smog - air pollution by a mixture of smoke and fog smogginess portmanteau, portmanteau word, blend - a new word formed by joining two others and combining their meanings; `smog' is a blend of `smoke' and `fog'; `motel' is a portmanteau word made by combining `motor' and `hotel'; `brunch' is a well-known portmanteau
Ammonia or azane is a compound of nitrogen and hydrogen with the formula NH 3. It is a colourless gas with a characteristic pungent smell. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers.
Ammonium phosphate is the salt of ammonium and phosphate. It is a highly unstable compound with the formula (NH 4) 3 PO 4.Because of its instability, it is an elusive and of no commercial value (except for scientific research).In addition to (NH 4) 3 PO 4, a related double salt (NH 4) 3 PO 4 .(NH 4) 2 HPO 4 is also recognized. It too is unstable.n contrast to the fragile nature of the triammonium salts, diammonium phosphate (H(NH 4) 2 PO 4) is a valuable material, mainly used as a fertilizer.