Chapter 6  The Genetic Material. The Basic Requirements for Genetic Material (i.e., the material that determines the inherited characteristics of a functional organism): 1  It must be stable.  It must be capable of being expressed when needed.
- In the manufacture of metal or alloys. Toxicology : Zirconium compounds are generally considered to be of low toxicity. Skin : Granulomata have been produced by repeated topical applications of zirconium salts to human skin.
Trivalent chromium (Cr(III)) ion is possibly required in trace amounts for sugar and lipid metabolism, although the issue remains in debate. In larger amounts and in different forms, chromium can be toxic and carcinogenic.The most prominent example of toxic chromium is hexavalent chromium (Cr(VI)).aturally occurring chromium is composed of three stable isotopes; 52 Cr, 53 Cr and 54 Cr with 52 Cr being the most abundant (83.789% natural abundance). 19 radioisotopes have been characterized with the most stable being 50 Cr with a half-life of (more than) 1.8 Ã 10 years, and 51 Cr with a half-life of 27.7 days.