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The compound, Cs 3 CdH 5, prepared by the reaction of caesium hydride, CsH, and cadmium metal powder at high temperature contains the CdH 2− 4 ion, along with caesium cations, Cs +, and hydride anions, H −. The tetrahedral anion is an example of an ionic complex of CdH 2. The average Cd-H bond length in CdH 2− 4 is 182pm. [5]
99.8% pure compressed deuterium gas, in lot size of 850 L (142 g). Also sold by same supplier in the form of heavy water at price of 3940 USD per kg deuterium. [12] In 2016, Iran sold 32 tons of heavy water to United States for 1336 USD per kg deuterium. [13] 2: He: Helium: 0.0001785: 0.008 (2.216 × 10 14 kg) 24.0: 0.004 29: 2018: USGS MCS [14]
Cadmium telluride (CdTe) is a stable crystalline compound formed from cadmium and tellurium. It is mainly used as the semiconducting material in cadmium telluride photovoltaics and an infrared optical window. It is usually sandwiched with cadmium sulfide to form a p–n junction solar PV cell.
The Merck Group, branded and commonly known as Merck, is a German multinational science and technology company headquartered in Darmstadt, with about 60,000 employees and a presence in 66 countries. The group includes around 250 companies; the main company is Merck KGaA in Germany. The company is divided into three business lines: Healthcare ...
List of chemical elements. 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [1]
Its chemical formula is MoS 2. The compound is classified as a transition metal dichalcogenide. It is a silvery black solid that occurs as the mineral molybdenite, the principal ore for molybdenum. [6] MoS 2 is relatively unreactive. It is unaffected by dilute acids and oxygen. In appearance and feel, molybdenum disulfide is similar to graphite.
Sigma-Aldrich. Sigma-Aldrich (formally MilliporeSigma) [5][6] is an American chemical, life science, and biotechnology company owned by the multinational chemical conglomerate Merck Group. Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company. It grew through various acquisitions until it had ...
Many of the chemicals in certain foods can cause chronic headaches, including caffeine, nitrites, nitrates, tyramine, and alcohols. [44] Some of the foods and beverages that people with chronic headaches are advised to avoid include caffeinated beverages, chocolate, processed meats, cheese and fermented dairy products, fresh yeast-risen baked ...