We don't have synonyms for dichromates yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are dichromatic, dichromate and bichromate.
(n) :
(chemistry) Any salt of dichromic acid; in solution the orange dichromate anion.(Cr₂O₇²⁻) is in equilibrium with the yellow chromate anion (CrO₄²⁻), the relative amount of each ion depending on the pH; they are both very powerful oxidizing agents
(n) :
(chemistry) Any salt of dichromic acid; in solution the orange dichromate anion.(Cr₂O₇²⁻) is in equilibrium with the yellow chromate anion (CrO₄²⁻), the relative amount of each ion depending on the pH; they are both very powerful oxidizing agents