21. The red pigment vermilion is obtained by grinding natural cinnabar or synthetic mercuric sulfide. 22. Thus, it causes an excess in production of mercuric ( II ) reductase. 23. The term refers to 19th century hat makers who used pelts cured in mercuric salts. 24. In the early 1800s, milliners used the mercuric sulfide in the making of hats. 25. Magnesium was first produced by mercuric oxide. 26. Mercury batteries use a reaction between mercuric oxide and zinc electrodes in an alkaline electrolyte. 27. Cupric sulfate was not as efficient as mercuric oxide, and yielded lower protein results. 28. Mercuric chloride is used to remove dithiane groups attached to a carbonyl in an umpolung reaction.29. Fixatives containing mercuric chloride or potassium dichromate are toxic, making disposal as hazardous waste costly. 30. In addition, it can be produced by reacting mercuric sulfate with potassium ferrocyanide in water:
