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Carbon Dioxide
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
Oxygen Compounds
Inorganic compounds that contain oxygen as an integral part of the molecule.
Year introduced: 1998
Carbon Compounds, Inorganic
Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons.
Oxides
Binary compounds of oxygen containing the anion O(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides.
Year introduced: 1966
Inorganic Chemicals
A broad class of substances encompassing all those that do not include carbon and its derivatives as their principal elements. However, carbides, carbonates, cyanides, cyanates, and carbon disulfide are included in this class.
Gases
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant and Hackh's Chemical Dictionary, 5th ed)