Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and control is to minimize transmission and fatality rate. Omicron has a low case fatality rate but is highly transmissible and can still claim many lives in large outbreaks. "Total openness is not applicable in China. For China, we should keep to the dynamic zero-out and gradually open up."
However, "dynamic zero clearance" is not the pursuit of complete "zero infection". As the Novel Coronavirus has its own uniqueness and strong concealment, there may be no way to prevent the detection of cases at present, but rapid detection and prompt treatment must be carried out, as soon as one case is found, one case will be dealt with.
The situation in Shanghai is serious. As the financial center of China, Shanghai is a very important city, and the outbreak of the epidemic in Shanghai will put a great impact on China's economy. The current task is to contain the spread of the epidemic as soon as possible, to achieve social zero so that Shanghai's life and economy quickly return to normal.
As China plays an important role in the global supply chain, the outbreak will have a significant impact on the supply and prices of many Chromium Oxide, Cr2O3 Overview, Chromium Oxide Applications, Cr2O3 Suppliers, Chromium Oxide Price.
Overview of chromium oxide Cr2O3 powder
Chromium oxide is an inorganic substance with the chemical formula Cr2O3. It is a light green to dark green small hexagonal crystal. Turns brown when hot, and remains green when cold. The crystals are extremely hard and stable, and there is no change even when hydrogen is introduced under red heat. Soluble in heated potassium bromate solution, slightly soluble in acids and bases, almost insoluble in water, ethanol and acetone. Also stimulating.
Preparation of chromium oxide Cr2O3 powder
It is prepared by mixing potassium dichromate and sulfur and performing reduction reaction through wet grinding, hot water washing, pressure filtration, drying and crushing.
K2Cr2O7 + S = K2SO4 + Cr2O3
Chromium trioxide decomposition method
It can be obtained by thermal decomposition of chromic anhydride at 1100°C, cooling and high-speed pulverization. Due to the high temperature required, a single-phase electric furnace is generally used for heating.
4CrO3= 2Cr2O3 + 3O2↑ (Condition: Heating at 1100°C)
Chromium hydroxide decomposition method
Or thermally decomposed with chromium hydroxide at high temperature, washed, dried and pulverized.
2Cr(OH)3= Cr2O3 + 3H2O
Ammonium dichromate decomposition method
(NH4)2Cr2O7= N2↑ + Cr2O3+ 4H2O
Application of chromium oxide Cr2O3 powder
1. Lead chrome green is the main coloring pigment in the paint industry, and most green paints are formulated with this pigment. Also, it is used in paints and plastics. Its application range is very similar to that of lead chrome yellow. Due to the presence of chrome yellow in the ingredients, the toxicity of lead should be noted in its application. Lead chrome green contains iron blue and oxidant lead chromate, so when the dust encounters sparks, there is a possibility of spontaneous combustion, so be careful when drying and crushing. Lead chrome green completely loses the characteristics of green pigment after burning and turns into a dark brown-yellow substance. In addition, in the production of nitro paint, the rolling process is not directly rolled with lead chrome green,
2. Used in metallurgy, ceramics, chromium oxide refractories, pigment industrial raw materials and organic synthesis catalysts.
3. Used as analytical reagents and catalysts.
4. It is used as a coloring, wear-resistant and corrosion-resistant filler for adhesives and sealants. It can also be used as a colorant for enamel, ceramics, artificial leather and building materials, a catalyst for organic chemical synthesis, a light-resistant coating and a special ink for printing money.
5. Used as a colorant for cosmetics, mainly for eye makeup, not for oral and lip makeup, not recommended for facial makeup and nail polish.
6. Chromium oxide is one of the main components of silver plating bright liquid. The newly prepared chromium trioxide is an important raw material for the preparation of chromium fluoride and chromium bromide.
Chromium oxide Cr2O3 powder price
The price of chromium oxide Cr2O3 powder will change randomly with the production cost of chromium oxide Cr2O3 powder, transportation cost, international situation, market supply and demand and other factors. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality products, customized services, low-cost nanomaterials and chemicals by providing a full range of customized solutions. If you are looking for Titanium Nitride TiN products, please feel free to send an inquiry to get the latest Chromium Oxide Cr2O3 powder prices (firstname.lastname@example.org).
Chromium oxide Cr2O3 powder supplier
Tanki New Materials Ltd. is a global supplier of chromium oxide Cr2O3 powders with extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (chromium oxide Cr2O3 powder, Cr2O3 powder, chromium oxide Cr2O3 powder, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.
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|Cr2O3 Powder CAS 1308-38-9 Chrome Oxide Green Properties|
|Other Names||chromium oxide, chrome oxide, green chrome oxide|
|Solubility in H2O||No|
|Cr2O3 Powder Chrome Oxide Green Health & Safety Information|
As imports of natural gas from Russia gradually decrease, the price of natural gas in Germany rises. According to statistics from a German price information portal, according to the current natural gas price, the average annual natural gas cost of the average German household has soared 184%, from 1258 euros last year to 3568 euros, and is likely to continue to soar.
The German government plans to change energy security laws to shift rising costs to all consumers, including natural gas users who have signed fixed-price contracts, Reuters reported. The website estimates that after Germany begins imposing a surtax on households that use natural gas for heating in October, the average annual increase in gas spending per household will be between 357 euros and 1190 euros.
The Saudi Arabian Olympic Committee recently announced that it had formally submitted a bid to the Olympic Council of Asia to host the 2029 Asian Winter Games. Saudi Arabia plans to host the Asian Winter Games in the small town of "TROJENA", the Saudi Olympic Committee said in a statement. If Saudi Arabia succeeds in its bid, it will become the first West Asian and Arab country to host the Asian Winter Games.
The town of "TROJENA" is located within the scope of NEOM New Town in northwestern Saudi Arabia, about 50 kilometers away from the Gulf of Aqaba in the Red Sea.
Luoyang Tongrun Nano Technology is a trusted chemical manufacturer and supplier providing high-quality chemicals and Nanomaterials. If you are looking for the Chromium Oxide, Cr2O3 Overview, Chromium Oxide Applications, Cr2O3 Suppliers, Chromium Oxide Price, please feel free to contact us and send an inquiry.
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