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HEPES
A dipolar ionic buffer.
Year introduced: 1991(1975)
Buffers
A chemical system that functions to control the levels of specific ions in solution. When the level of hydrogen ion in solution is controlled the system is called a pH buffer.
Year introduced: 1967(1964)
Alkanesulfonic Acids
Sulfonic acid derivatives that are substituted with an aliphatic hydrocarbon group.
Year introduced: 1994
Sulfur Compounds
Inorganic or organic compounds that contain sulfur as an integral part of the molecule.
Year introduced: 1998
Sulfur Acids
Inorganic or organic acids that contain sulfur as an integral part of the molecule.
Sulfonic Acids
Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.
Piperazines
Compounds that are derived from PIPERAZINE.
Organic Chemicals
A broad class of substances containing carbon and its derivatives. Many of these chemicals will frequently contain hydrogen with or without oxygen, nitrogen, sulfur, phosphorus, and other elements. They exist in either carbon chain or carbon ring form.
Hydrocarbons, Acyclic
Organic compounds composed exclusively of carbon and hydrogen where no carbon atoms join to form a ring structure.
Hydrocarbons
Organic compounds that primarily contain carbon and hydrogen atoms with the carbon atoms forming a linear or circular structure.
Heterocyclic Compounds, 1-Ring
Organic compounds that contain a ring structure made up of carbon and one or more additional elements such as nitrogen and oxygen.
Heterocyclic Compounds
Cyclic compounds that include atoms other than carbon in their ring structure.
Alkanes
The generic name for the group of aliphatic hydrocarbons Cn-H2n+2. They are denoted by the suffix -ane. (Grant and Hackh's Chemical Dictionary, 5th ed)
Year introduced: 1966
Specialty Uses of Chemicals
Uses of chemicals in a research, industrial, or household setting. This does not include PHARMACOLOGIC ACTIONS.
Year introduced: 2004(1999)
Chemical Actions and Uses
A group of pharmacologic activities, effects on living systems and the environment, and modes of employment of drugs and chemicals. They are broken into actions, which describe their effects, and uses, which describe how they are employed.
Year introduced: 1999
Laboratory Chemicals
Chemicals necessary to perform experimental and/or investigative procedures and for the preparation of drugs and other chemicals.