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The salt is typically prepared by reduction of gold(III) chloride with thiosulfate: [3] 4 Na 2 S 2 O 3 + AuCl 3 → Na 3 [Au(S 2 O 3) 2] + Na 2 S 4 O 6 + 3 NaCl. The compound was first synthesized in 1845 by Mathurin-Joseph Fordos and A. Gélis who were researching chemicals used in the Daguerrotype photographic process.
Guía Roji (Roji's Guides) is a cartography company based in Mexico City. Guía Roji was created in 1928 by Joaquín Palacios Roji Lara. Since that year, the characteristic cover color of the map books has been red. The first maps showed the reduced size of Mexico City in the 1920s. In the late 1960s, the number of maps began to increase ...
Glucono-δ-lactone (GDL), also known as gluconolactone, is an organic compound with the formula (HOCH) 3 (HOCH 2 CH)CO 2. A colorless solid, it is an oxidized derivative of glucose . It is typically produced by the aerobic oxidation of glucose in the presence of the enzyme glucose oxidase .
Magnesium azide is an inorganic chemical compound with the formula Mg(N 3) 2. It is composed of the magnesium cation ( Mg 2+ ) and the azide anions ( N − 3 ). Properties
Disk containing 1 μCi of sodium-22. Sodium-22 is a radioactive isotope of sodium, undergoing positron emission to 22 Ne with a half-life of 2.6019(6) years. 22 Na is being investigated as an efficient generator of "cold positrons" to produce muons for catalyzing fusion of deuterium.
Faujasite (FAU-type zeolite) is a mineral group in the zeolite family of silicate minerals.The group consists of faujasite-Na, faujasite-Mg and faujasite-Ca. They all share the same basic formula (Na 2,Ca,Mg) 3.5 [Al 7 Si 17 O 48]·32(H 2 O) by varying the amounts of sodium, magnesium and calcium. [1]
The GDL utilised smokeless (TNT) gunpowder on a non-volatile solvent for solid propellant rockets. The first test-firing of a solid fuel rocket was carried out in March 1928, which flew for about 1,300 meters [4] In 1931 the world's first successful use of rockets to assist take-off of aircraft were carried out on a U-1, the Soviet designation for an Avro 504 trainer, which achieved about one ...
Sodium aluminate is an inorganic chemical that is used as an effective source of aluminium hydroxide for many industrial and technical applications. Pure sodium aluminate is a white crystalline solid having a formula variously given as NaAlO 2, NaAl(OH) 4 (), [3] Na 2 O·Al 2 O 3, or Na 2 Al 2 O 4.