Some niobium is found in all parts of the body.
No reports of human intoxication.
An eye and severe skin irritant.
Can cause kidney damage.
Experimentally, there is moderate fibrogenic effect on the lungs after intra-tracheal administration.
Flammable in the form of dust when exposed to flame or by chemical reaction. It ignites in fluorine, chlorine.
Sax's Dangerous Properties of Industrial Materials.
Article by Edouard Bastarache
Edouard Bastarache is a well known doctor that has written many articles on the subject of toxicity of ceramic materials and books on technical aspects of ceramics. He writes in both English and French.
By Edouard Bastarache