Fill in this field either the entire NPU code (e.g. NPU01807) or the numeric values (e.g. 01807). It is also possible to fill parts of the code, e.g. NPU018 and the search will try to match all codes containing this combination.

This field can be used to search for codes by (parts of the) component, e.g. Acetazolamide. Do not use prefixes or synonyms in this field. A prefix can be used in the "Prefix" field.

This field can be used to specify a short name for the system, e.g. Csf, Amf or P. Please note that by using a short name like "P", the search will return all systems containing a "P", including "Biopsy".

This field can be used to search for chemicals with a prefix (such as '1,3-Dimethylbenzene'), e.g. 1,3 or 25-.

This field can be used to search by the abbreviated expression of characteristic species, such as arb.c. or arb.num..

This field can be used to search by the abbreviated expression of the unit, or part of it, like µmol/L or µkat/kg.
It is not possible to search by using the full-length units, such as 'millimoles per liter.”.

On most keyboards, character 'μ' can be typed by using a key combination like [Alt Gr + m].