Two or more different elements held together in fixed proportions by attractive forces called chemical bonds.

Elements Formulas Gases Ions Liquids

A class of organic compounds containing a ring structure made up of more than one kind of atom, usually Carbon plus another atom. The ring structure can be aromatic or nonaromatic.

A class of organic compounds containing two ring structures, one of which is made up of more than one kind of atom, usually Carbon plus another atom. The heterocycle may be either aromatic or nonaroma [..]

A class of organic compounds containing three ring structures, one of which is made up of more than one kind of atom, usually Carbon plus another atom. The heterocycle may be either aromatic or nonaro [..]

Organic Mercury Compounds in which the Mercury is attached to an alkyl group.

Aluminum metal sulfate compounds used medically as Astringents and for many industrial purposes. They are used in Veterinary Medicine for the treatment of ulcerative Stomatitis, Leukorrhea, conjunctiv [..]

Inorganic compounds that contain Aluminum as an integral part of the molecule.

Biphenyl compounds substituted in any position by one or more amino groups. Permitted are any substituents except fused rings.

Compounds that interact with Androgen Receptors in target Tissues to bring about the effects similar to those of Testosterone. Depending on the target Tissues, androgenic effects can be on Sex Differe [..]

Inorganic or organic compounds that contain Arsenic.

Macrocyclic polyamines related to aza-oxa Crowns (Crown Ethers).

Inorganic compounds that contain Barium as an integral part of the molecule.

A mixture of alkylbenzyldimethylammonium compounds. It is a bactericidal quaternary ammonium Detergent used topically in medicaments, Deodorants, Mouthwashes, as a surgical antiseptic, and as a as pre [..]

Compounds containing the PhCH= radical.

Analogs or derivatives of bephenium (N,N-dimethyl-N-(2-phenoxyethyl)benzenemethanaminium).

Inorganic or organic compounds that contain Boron as an integral part of the molecule.

Cyclic Hydrocarbons that contain multiple rings and share one or more atoms.

A class of organic compounds which contain two rings that share a pair of bridgehead Carbon atoms.

Inorganic compounds that contain Bromine as an integral part of the molecule.

Inorganic compounds that contain Cadmium as an integral part of the molecule.

Inorganic compounds that contain Calcium as an integral part of the molecule.

Cetyltrimethylammonium compounds that have cationic Detergent, antiseptic, and disinfectant activities. They are used in pharmaceuticals, Foods, and Cosmetics as preservatives; on Skin, Mucous Membran [..]

Inorganic compounds that contain Chromium as an integral part of the molecule.

Colorless, endogenous or exogenous pigment precursors that may be transformed by biological mechanisms into colored compounds; used in biochemical assays and in Diagnosis as indicators, especially in [..]

Macrocyclic Compounds analogous to Crown Ethers but which lack any Oxygen atoms.

Compounds that contain the decamethylenebis(trimethyl)ammonium radical. These compounds frequently act as Neuromuscular Depolarizing Agents.

Compounds with three contiguous Nitrogen atoms in linear format R2N-N=NR.

Compounds that contain a 1-dimethylaminonaphthalene-5-sulfonyl group.

Compounds which contain the methyl radical substituted with two Benzene rings. Permitted are any substituents, but ring fusion to any of the Benzene rings is not allowed.

Organic compounds that include a cyclic Ether with three ring atoms in their structure. They are commonly used as precursors for Polymers such as Epoxy Resins.

Compounds that interact with Estrogen Receptors in target Tissues to bring about the effects similar to those of Estradiol. Estrogens stimulate the female reproductive organs, and the development of s [..]

Organic Mercury Compounds in which the Mercury is attached to an ethyl group.

Inorganic or organic compounds containing trivalent Iron.

Inorganic or organic compounds that contain divalent Iron.

Inorganic compounds that contain Fluorine as an integral part of the molecule.

Inorganic compounds that contain Gold as an integral part of the molecule.

Ring compounds having atoms other than Carbon in their nuclei. (Grant & Hackh's Chemical Dictionary, 5th ed)

A class of saturated compounds consisting of two rings only, having two or more atoms in common, containing at least one hetero atom, and that take the name of an open chain hydrocarbon containing the [..]

Compounds containing the hexamethylenebis(trimethylammonium) cation. Members of this group frequently act as Antihypertensive Agents and selective Ganglionic Blocking Agents.

Compounds that contain the radical R2C=N.OH derived from condensation of Aldehydes or KETONES with Hydroxylamine. Members of this group are Cholinesterase Reactivators.

Inorganic compounds that contain Carbon as an integral part of the molecule but are not derived from hydroCarbons.

Inorganic compounds that contain Chlorine as an integral part of the molecule.

Agents that are capable of inserting themselves between the successive bases in DNA, thus kinking, uncoiling or otherwise deforming it and therefore preventing its proper functioning. They are used in [..]

Inorganic compounds that contain Iodine as an integral part of the molecule.

Organic and inorganic compounds that contain Iron as an integral part of the molecule.

Complex of Iron atoms chelated with carbonyl Ions.

Inorganic compounds that contain Lithium as an integral part of the molecule.

Cyclic compounds with a ring size of approximately 1-4 dozen atoms.

Inorganic compounds that contain Magnesium as an integral part of the molecule.

Inorganic Chemicals that contain Manganese as an integral part of the molecule.

Inorganic compounds that contain Mercury as an integral part of the molecule.

A group of compounds that are derivatives of beta-methylacetylcholine (methacholine).

Organic compounds in which Mercury is attached to a methyl group.

Urea compounds which are substituted with one or more methyl groups.

Strong alkylating and Immunosuppressive Agents whose biological activity is based on the presence of bis(2-chloroethyl)- groups. Although otherwise structurally diverse, the compounds have in common t [..]

Inorganic compounds that contain Nitrogen as an integral part of the molecule.

A group of Alkylating Agents derived from Mustard Gas, with the Sulfur replaced by Nitrogen. They were formerly used as toxicants and vesicants, but now function as Antineoplastic Agents. These compou [..]

Ions with the suffix -onium, indicating Cations with coordination number 4 of the type RxA+ which are analogous to Quaternary Ammonium Compounds (H4N+). Ions include phosphonium R4P+, oxonium R3O+, su [..]

Hydrocarbon compounds with one or more of the hydrogens replaced by Chlorine.

Organic compounds that contain Gold as an integral part of the molecule. Some are used as Antirheumatic Agents. The term chrysotherapy derives from an ancient Greek term for Gold.

Organic compounds which contain Mercury as an integral part of the molecule.

A class of compounds of the type R-M, where a C atom is joined directly to any other element except H, C, N, O, F, Cl, Br, I, or At. (Grant & Hackh's Chemical Dictionary, 5th ed)

Organic compounds that contain Phosphorus as an integral part of the molecule. Included under this heading is broad array of synthetic compounds that are used as Pesticides and Drugs.

Organic compounds which contain Platinum as an integral part of the molecule.

Organic compounds which contain Selenium as an integral part of the molecule.

Organic compounds that contain Technetium as an integral part of the molecule. These compounds are often used as Radionuclide Imaging agents.

Compounds containing Carbon-Phosphorus bonds in which the Phosphorus component is also bonded to one or more Sulfur atoms. Many of these compounds function as Cholinergic Agents and as Insecticides.

Organic compounds which contain tin in the molecule. Used widely in Industry and Agriculture.

Inorganic compounds that contain Osmium as an integral part of the molecule.

Inorganic compounds that contain Oxygen as an integral part of the molecule.

Organic Mercury Compounds in which the Mercury is attached to a phenyl group. Often used as fungicides and Seed treatment agents.

Inorganic compounds that contain Phosphorus as an integral part of the molecule.

Inorganic compounds which contain Platinum as the central atom.

Biphenyl compounds which are extensively brominated. Many of these compounds are toxic Environmental Pollutants.

Industrial products consisting of a mixture of chlorinated biphenyl congeners and isomers. These compounds are highly lipophilic and tend to accumulate in fat stores of Animals. Many of these compound [..]

Compounds consisting of three Benzene rings linked to each other in either ortho, meta or para positions and substituted with Chlorine atoms.

Compounds consisting of two or more fused ring structures.

Inorganic compounds that contain Potassium as an integral part of the molecule.

Various Salts of a quaternary ammonium oxime that reconstitute inactivated Acetylcholinesterase, especially at the Neuromuscular Junction, and may cause Neuromuscular Blockade. They are used as Antido [..]

Inorganic compounds that contain Ruthenium as an integral part of the molecule.

Inorganic compounds that contain Selenium as an integral part of the molecule.

Inorganic compounds that contain Silicon as an integral part of the molecule.

Inorganic compounds that contain Silver as an integral part of the molecule.

Inorganic compounds that contain Sodium as an integral part of the molecule.

A group of compounds consisting in part of two rings sharing one Carbon atom in common.

Compounds containing the -SH radical.

Sulfur Compounds in which the Sulfur atom is attached to three organic radicals and an electronegative element or radical.

Inorganic or organic compounds that contain Sulfur as an integral part of the molecule.

Inorganic compounds that contain Technetium as an integral part of the molecule. Technetium 99m (m=metastable) is an isotope of Technetium that has a Half-Life of about 6 hours. Technetium 99, which h [..]

Compounds consisting of Benzene rings linked to each other in either ortho, meta or para positions. Permitted are any substitutions, but ring fusion to any of the Benzene rings is not allowed.

Inorganic compounds that contain Thorium as an integral part of the molecule.

Inorganic compounds that contain tin as an integral part of the molecule.

Organometallic Compounds which contain tin and three alkyl groups.

Organic compounds composed of tin and three ethyl groups. Affect mitochondrial Metabolism and inhibit Oxidative Phosphorylation by acting directly on the energy conserving processes.

Organic Silicon derivatives used to characterize Hydroxysteroids, Nucleosides, and related compounds. Trimethylsilyl esters of Amino Acids are used in peptide synthesis.

Organic compounds composed of tin and three methyl groups. Affect mitochondrial Metabolism and inhibit Oxidative Phosphorylation by acting directly on the energy conserving processes.

Benzene derivatives which are substituted with three nitro groups in any position.

Compounds that contain the triphenylmethane aniline structure found in rosaniline. Many of them have a characteristic magenta Color and are used as Coloring Agents.

Inorganic compounds that contain Tungsten as an integral part of the molecule.

Inorganic compounds that contain Uranium as an integral part of the molecule.

Inorganic compounds that contain Vanadium as an integral part of the molecule.

Organic compounds that have a relatively high Vapor Pressure at room Temperature.

Inorganic compounds that contain Zinc as an integral part of the molecule.