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more general categories information about this item 10. Biology and Chemistry 10. Biology and Chemistry Biology and Chemistry (144) Biochemistry (39) description: E numbers are codes for substances which can be used as food additives for use within the European Union and Switzerland (the "E" stands for "Europe"). They are commonly found on food labels throughout the European Union. AFDSI created an E number ontology to integrate E number data. complete name: European Union E Numbers