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In 2005–06, potassium dichromate was the 11th-most-prevalent allergen in patch tests (4.8%). [12] Potassium dichromate is one of the most common causes of chromium dermatitis; [13] chromium is highly likely to induce sensitization leading to dermatitis, especially of the hand and forearms, which is chronic and difficult to treat ...
Potassium dichromate: general-purpose oxidizing agent Pyridine and its salts general-purpose solvent Sodium borohydride: reducing agent Sodium dichromate: general-purpose oxidizing agent Sodium metal phenylacetone: Sodium triacetoxyborohydride: reducing agent para-fluoro-1-boc-4-anilopiperidine parafluorofentanyl: Thioglycolic acid: modafinil ...
An example is potassium dichromate, which does not pass the dangerous goods test of an oxidizing agent. The U.S. Department of Transportation defines oxidizing agents specifically. There are two definitions for oxidizing agents governed under DOT regulations. These two are Class 5; Division 5.1(a)1 and Class 5; Division 5.1(a)2. Division 5.1 ...
Potassium permanganate: a strong oxidizing agent; can be used to quantitatively determine the total oxidisable organic material in an aqueous sample; a reagent for the synthesis of organic compounds Pyridinium chlorochromate: used to oxidize primary alcohols to aldehydes and secondary alcohols to ketones Pyridinium dichromate (Cornforth reagent)
Bichromate cells. Left - single fluid, right - two fluid. The chromic acid cell is a type of primary cell which uses chromic acid as a depolarizer.The chromic acid is usually made by acidifying (with sulfuric acid) a solution of potassium dichromate.
Predominance diagram for chromate. In aqueous solution, chromate and dichromate anions exist in a chemical equilibrium.. 2 CrO 2− 4 + 2 H + ⇌ Cr 2 O 2− 7 + H 2 O. The predominance diagram shows that the position of the equilibrium depends on both pH and the analytical concentration of chromium.
Of these, potassium dichromate (K 2 Cr 2 O 7) is the most effective: it is relatively cheap, easy to purify, and can nearly completely oxidize almost all organic compounds. In these methods, a fixed volume with a known excess amount of the oxidant is added to a sample of the solution being analyzed.
Chromyl chloride can be prepared by the reaction of potassium chromate or potassium dichromate with hydrogen chloride in the presence of sulfuric acid, followed by distillation. [3] [4] K 2 Cr 2 O 7 + 6 HCl → 2 CrO 2 Cl 2 + 2 KCl + 3 H 2 O. The sulfuric acid serves as the dehydration agent.