| 单词 | sodium dichromate |
| 例句 | “These plaintiffs were not exposed to dangerous amounts of sodium dichromate and did not suffer any damages as a result of anything KBR did or did not do,” Harrison said. Court vacates $85 million award for Oregon National Guardsmen in Iraq health case 2015-05-14T04:00:00Z Court documents filed for the guardsmen said that much of the sodium dichromate was in powder form and blowing around the plant. Oregon guardsmen say were knowingly exposed to toxic chemicals in Iraq 2012-10-11T01:41:20Z In September, the local government arrested five people for the dumping and ordered the company to halt production of chromium and sodium dichromate. China cancer village tests reach of law against pollution 2012-01-16T12:34:33Z Commercial sodium dichromate is hygroscopic and contains varying amounts of water. Organic Syntheses At first a greenish-black precipitate forms, but upon further addition of the sodium dichromate solution, the color changes to yellowish green. Organic Syntheses This requires about one-half to three-quarters of an hour; 90 to 110 cc. of sodium dichromate solution is necessary. Organic Syntheses When technical sodium dichromate is used, the solution should be filtered with suction, before it is added to the hydroquinone, in order to remove any insoluble impurities. Organic Syntheses In all 540 g. of sodium dichromate are added, the addition taking one to two hours. Organic Syntheses A concentrated solution of technical sodium dichromate is prepared by dissolving 140 g. in 65 cc. of water. Organic Syntheses Technical sodium dichromate generally contains a certain amount of chlorides, and the chlorine liberated from these tends to cause a troublesome foam towards the end, of the reaction. Organic Syntheses The amount of solid sodium dichromate given is for the dry crystalline compound containing two molecules of water of crystallization. Organic Syntheses |
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