In what ways would a dissolved anion of chromate/dichromate such as in potassium dichromate, be dangerous? I know it's a strong oxidizer and a carcinogen (causes cancer), I would like to know what kind of contact will cause these to take effect and to what extent (i.e. contact with solution liquid on bare skin versus inhaling of solution vapour) Beside these, is there a safe way to load a very dilute solution of chromate in a cuvette for the use of a photospectrometer? What do I have to be careful about? Any suggested protection? In addition, what will be the effect of combining the solution with dilute inorganic acid or base? I tried to look for an official website with regulated evaluation of chromate's toxicity, but I can't find anything practical or answer the above questions.