21. Molecular chromic acid , H 2 CrO 4, has much in common with sulfuric acid, H 2 SO 4. 22. Chromic acid was widely used in the instrument repair industry, due to its ability to " brighten " raw brass.23. Interested individuals should read up on the process before attempting, as the chromic acids are very dangerous to work with. 24. His research interests were also in the oxidation of open-chain and aromatic hydrocarbons with chromic acid and chromic oxychloride. 25. The cell was also known as the'chromic acid cell', but principally as the'bichromate cell '. 26. Roy Beck, Charles Peter and Edward Owens studied and experimented with chromic acid salt sensitized emulsions for photo-reactive stencils. 27. Chromic acid solutions are never used, due to traces of paramagnetic chromium left behind on the tubes causing interference with NMR experiments.28. Nitric and chromic acids are powerful oxidizing agents, and effective depolarizers, but their hazardous nature makes them unsuitable for general use. 29. It is oxidized by chromic acid to isovaleraldehyde, and it forms addition compounds crystals with calcium chloride and tin ( IV ) chloride. 30. The dark red chromium ( VI ) oxide, the acid anhydride of chromic acid , is sold industrially as " chromic acid ".
