NCIt definition : An element with atomic symbol K, atomic number 19, and atomic weight 39.10.;
Alternative definition : NCI-GLOSS: A metallic element that is important in body functions such as regulation
of blood pressure and of water content in cells, transmission of nerve impulses, digestion,
muscle contraction, and heartbeat.;
UNII : RWP5GA015D;
CAS number : 7440-09-7; a href https://gsrs.ncats.nih.gov/ginas/app/beta/browse-substance?search 7440-09-7
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