In toxicology, the median lethal dose, LD50 (abbreviation for "lethal dose, 50%"), LC50 (lethal concentration, 50%) or LCt50 is a toxic unit that measures the lethal dose of a given substance. The value of LD50 for a substance is the dose required to kill half the members of a tested population after a specified test duration. LD50 figures are frequently used as a general indicator of a substance's acute toxicity. A lower LD50 is indicative of increased toxicity.
A CAS Registry Number is a unique identification number assigned by the Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature. It includes all substances described since 1957, plus some substances from as far back as the early 1800s. It is a chemical database that includes organic and inorganic compounds, minerals, isotopes, alloys, mixtures, and nonstructurable materials. CAS RNs are generally serial numbers, so they do not contain any information about the structures themselves the way SMILES and InChI strings do.
Potassium carbonate is the inorganic compound with the formula K2CO3. It is a white salt, which is soluble in water and forms a strongly alkaline solution. It is deliquescent, often appearing as a damp or wet solid. Potassium carbonate is mainly used in the production of soap and glass.
Lithium bromide (LiBr) is a chemical compound of lithium and bromine. Its extreme hygroscopic character makes LiBr useful as a desiccant in certain air conditioning systems.
Propylparaben, the n-propyl ester of p-hydroxybenzoic acid, occurs as a natural substance found in many plants and some insects, although it is manufactured synthetically for use in cosmetics, pharmaceuticals, and foods. It is a member of the class of parabens. It is a preservative typically found in many water-based cosmetics, such as creams, lotions, shampoos, and bath products. As a food additive, it has an E number, which is E216.
Disodium citrate, also known as disodium hydrogen citrate, Alkacitron, and sesquihydrate, is an acid salt of citric acid with the chemical formula Na2C6H6O7.
Dichlorodiphenyldichloroethane (DDD) is an organochlorine insecticide that is slightly irritating to the skin. DDD is a metabolite of DDT. DDD is colorless and crystalline; it is closely related chemically and is similar in properties to DDT, but it is considered to be less toxic to animals than DDT. The molecular formula for DDD is (ClC6H4)2CHCHCl2 or C14H10Cl4, whereas the formula for DDT is (ClC6H4)2CHCCl3 or C14H9Cl5.
Fluorenol, also known as hydrafinil, is an alcohol derivative of fluorene. In the most significant isomer, fluoren-9-ol or 9-hydroxyfluorene, the hydroxy group is located on the bridging carbon between the two benzene rings. Hydroxyfluorene can be converted to fluorenone by oxidation. It is a white-cream colored solid at room temperature.
Ethyl chloroformate is an organic compound with the chemical formula ClCO2CH2CH3. It is the ethyl ester of chloroformic acid. It is a colorless, corrosive and highly toxic liquid. It is a reagent used in organic synthesis for the introduction of the ethyl carbamate protecting group and for the formation of carboxylic anhydrides.
Demeton, sold as an amber oily liquid with a sulphur like odour under the name Systox, is an organophosphate derivative causing irritability and shortness of breath to individuals repeatedly exposed. It was used as a phosphorothioate insecticide and acaricide and has the chemical formula C8H19O3PS2. Although it was previously used as an insecticide, it is now largely obsolete due to its relatively high toxicity to humans. Demeton consists of two components, demeton-S and demeton-O in a ratio of approximately 2:1 respectively. The chemical structure of demeton is closely related to military nerve agents such as VX and a derivative with one of the ethoxy groups replaced by methyl was investigated by both the US and Soviet chemical-weapons programs under the names V.sub.X and GD-7.
gamma-Decalactone is a lactone and aroma compound with the chemical formula C10H18O2. It has an intense peach flavour, naturally present in many fruits and fermentations. It is particularly important in the formulation of peach, apricot, and strawberry flavourants for drinks, food, personal care products, pharmaceutical drugs and household goods.
Jasmine lactone is a lactone and aroma compound with a powerful fatty-fruity peach and apricot flavor. Its chemical formula is C10H16O2. It occurs naturally in jasmine oil, tuberose, gardenia, mimosa, honeysuckle, lily, tea, peach, and ginger. It is used as a food spice and is mainly used for the preparation of apricot, peach, dairy products, and as a tropical fruit flavor.
N,N-Dimethylphenethylamine (N,N-DMPEA) is a substituted phenethylamine that is used as a flavoring agent. It is an alkaloid that was first isolated from the orchid Eria jarensis. Its aroma is described as "sweet, fishy". It is mainly used in cereal, cheese, dairy products, fish, fruit and meat. It is also being used in pre-workout and bodybuilding supplements with claims of a stimulant effect.
Praseodymium(III) bromide is a crystalline compound of one praseodymium atom and three bromine atoms.
Erbium phosphide is a binary inorganic compound of erbium and phosphorus with the chemical formula ErP.
Comparison of psychoactive alcohols in alcoholic drinks.
Diglycidyl resorcinol ether, also called Resorcinol diglycidyl ether (RDGE) is a liquid aromatic organic chemical compound and chemically a glycidyl ether.
Fluoroethane is a hydrofluorocarbon with the chemical formula C2H5F). It is a volatile derivative of ethane. It appears as a colourless, odorless flammable gas at room temperature. Fluoroethane can also cause asphyxiation by the displacement of oxygen in air.
