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Term Definition Article Siehe auch
EATOS: Environmental Assessment Tool for Organic Syntheses. Java program for integrated evaluation of organic chemical syntheses based on the educts and products (including by-products and waste). The program was developed at the University of Oldenburg, Germany. Indices
Wikipedia: EC50
(Effective Concentration) The concentration of a substance in a surrounding medium [g/l in water], at which 50 percent of the tested aquatic organisms show a difined effect level (e.g. reproduction, O2 produxtion). Analogous definitions apply to EC10, EC5, etc. with corresponding effect levels. LC50
Wikipedia: ECD
Electron capture detector for gas chromatography (ionisation by radioactive 63Ni).
Wikipedia: educt
Starting material of a chemical synthesis, sometimes also denoted as substrate. The NOP adopts the definition of the Beilstein database that every starting material that contributes at least one C-atom to the product is called an educt. reagent
effect factor: The effect factor is a dimensionless number that is determined according to a method outlined in the German Technical Rules for Hazardous Substances (TRGS) 600. This method uses as input the known R phrases and the German threshold limit values. It also provides a classification of substances with not fully determined or unknown dangerous properties. Evaluation of substances
Wikipedia: EINECS-No.
Number of a chemical substance in the European Inventory of Existing Chemical Substances (EINECS), which lists all so-called old chemicals.
endocrine disruptor:
Wikipedia: endocrine disruptor
Chemical substance that can affect the hormone balance in higher organisms. Macroscopic effects may be e.g. disruption of the reproductive behaviour, increased growth or similar effects.
endothermal reaction: Chemical reaction that absorbs heat from the environment (energetic effect of the reaction). heat of reaction, exothermic reaction
energy efficiency:
Wikipedia: energy efficiency
Mass of the purified product per kJ of invested energy. The energy efficiency of a synthesis is strongly dependent on the equipment used, the experimentalist, and the preparation size. Energy measurement and indices mass efficiency
energy-induced methane equivalents: This key value describes the ratio of the amount of methane that must be burnt in a model energy plant to generate enough energy to perform a specific reaction to the mass of the generated product. Energy measurement and indices energy efficiency
Wikipedia: enthalpy
Thermodynamic state function. The difference of the enthalpies of the reaction products and the educts equals the heat reaction at constant pressure. heat of reaction
Wikipedia: entropy
Thermodynamic state function characterizing the disorder of the system.
exothermic reaction:
Wikipedia: exothermic reaction
Chemical reaction which liberates energy that is passed to the environment. heat of reaction, endothermal reaction
explosion limits:
Wikipedia: explosion limits
The lowest and the highest concentration of a gas in air, that forms an explosive mixture. Usually given in volume percent. flash point, autoignition temperature
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pages/glossary.php: November 09, 2022