Topic
Potassium dichromate
About: Potassium dichromate is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 18967 citations. The topic is also known as: Potassium dichromate(VI) & Chromium potassium oxide.
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TL;DR: The concentration homogeneity of nickel sulphate 4.8% pet and potassium dichromate 0.5% pet in patch test materials appeared to become less homogeneous if stored at room temperature compared to storage at 4 degrees C, after 2 months as mentioned in this paper.
Abstract: The concentration homogeneity of nickel sulphate 4.8% pet. and potassium dichromate 0.5% pet. in patch test materials appeared to become less homogeneous if stored at room temperature compared storage at 4 degrees C, after 2 months. The coefficient of variation of concentration for nickel sulphate after storage at 4 degrees C was 3.0883%, and at room temperature 25.3098%. The coefficient of variation for potassium dichromate after storage at 4 degrees C was 4.6324% and at room temperature 9.6334%. This indicates that patch test materials containing nickel sulphate and potassium dichromate should be kept refrigerated in the tropics.
3 citations
03 Jun 2020-Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Veterinary Medicine
TL;DR: The aim of this study was the evaluation of integrity biomarkers of reproductive toxicity: histoarchitecture of genital organs and sexual accessory glands at sexual maturity after exposure to potassium dichromate (Cr VI) in suckling period.
Abstract: The aim of this study was the evaluation of integrity biomarkers of reproductive toxicity: histoarchitecture of genital organs (testis and epididymis) and sexual accessory glands (prostate, seminal vesicles and bulbo-urethral glands) at sexual maturity after exposure to potassium dichromate (Cr VI) in suckling period. Consequent to the exposure of male rat pups to hexavalent chromium during suckling period structural changes appeared in genital organs and sexual accessory glands, such as: basal membrane and epithelial disintegration, interstitial edema, wavy basal membrane due to a reduction in tubule diameter, Leydig cell necrosis; epithelial smoothing, epithelial necrosis; epithelial cells desquamation and falling in lumen. Exposure to potassium dichromate (Cr VI) during suckling period produced severe congestive and degenerative lesions in genital organs and sexual accessory glands.
3 citations
TL;DR: In this paper, the passivator of potassium dichromate is one of the main electrolysis manganese passivation technologies in China and the biggest problem of hexavalent chromium passivation is chromium emission.
Abstract: The passivator of potassium dichromate is one of the main electrolysis manganese passivation technologies in China. The biggest problem of hexavalent chromium passivation is chromium emission. The end-pipe treatment of Cr-containing effluents can be understood as detoxification and precipitation. Here the highly toxicity Cr(Ⅵ) is reduced to low toxicity Cr(Ⅲ) . In alkaline conditions, Cr (Ⅲ)is precipitated in the type of chromium hydroxide and produce chromium residue. The landfill of Chromium residue is a big problem to environment safety. The measures of clean process were reviewed around with emission reduction of Cr.
3 citations
TL;DR: In this paper, a new and mild method for oxybromination of aromatic compounds with CuBr 2 and K 2 Cr 2 O 7 in HOAC was reported, which is a milder version of the traditional method.
Abstract: A new and mild method for oxybromination of aromatic compounds with CuBr 2 and K 2 Cr 2 O 7 in HOAC is reported.
3 citations
Patent•
24 Apr 2013
TL;DR: In this article, a volumetric analysis method adopting mercury-free titration of iron is described, which is characterized by dissolving an iron-containing sample by a conventional method, quantitatively reducing Fe to Fe with stannous chloride, then oxidizing excessive stANNous chloride with a methylene blue solution, in a sulfuric acid and phosphoric acid mixed environment, adding sulfanilic acid to remove light blue of methylene green, taking sodium diphenylaminesulfonate as an indicator and titrating Fe with a potassium dichromate standard solution until stable
Abstract: The invention discloses a volumetric analysis method adopting mercury-free titration of iron. The method is characterized by dissolving an iron-containing sample by a conventional method, quantitatively reducing Fe to Fe with stannous chloride, then oxidizing excessive stannous chloride with a methylene blue solution, in a sulfuric acid and phosphoric acid mixed environment, adding sulfanilic acid to remove light blue of methylene blue, taking sodium diphenylaminesulfonate as an indicator and titrating Fe with a potassium dichromate standard solution until stable purple red appears to be the end point and computing the mass fraction of iron in the iron-containing sample. The method has the beneficial effects that a highly toxic mercuric chloride reagent is avoided and pollution is reduced; and the analysis method is easy to operate, has high accuracy and is suitable for determining the content of the major component iron in iron ores and iron powder.
3 citations