Watch Queue Queue. English-Tamil dictionary. Sulfated stannia (SO4/SnO2) obtained by drying meta-stannic acids (supplied by Koujundo Kagaku and Yamanaka) at 200 °C, followed by exposing to 3 M H2SO4 and calcining at 300 °C showed catalytic activities higher than those of the materials obtained from conventional gels (preparation of stannia gels from SnCl4 and calcination at 500 °C) for the dehydration of methanol and the isomerization of butane. Such notifications are required for hazardous substances, mixtures, or articles, manufactured or imported at over 1 kg per annum. metastannic acid rus. Noun. Metastannic acid is a hydrated tin oxide, which exhibits high specific surface area and nano-particulate primary particle size. Metastannic (adj) pertaining to, or designating, a compound of tin (metastannic acid), obtained, as an isomeric modification of stannic acid, in the form of a white amorphous substance How to … By continuing you agree to the use of cookies. Substances for which classification and labelling data have been notified to ECHA by manufacturers or importers. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. https://doi.org/10.1016/j.apcata.2007.01.044. metastannic acid metastanato rūgštis statusas T sritis chemija formulė H₂SnO₃ atitikmenys: angl. The type of uses and classifications may vary between different submissions to ECHA and for a full understanding it is recommended to consult the source data. If no EU harmonised classification and labelling exists and the substance was not registered under REACH, information derived from classification and labelling (C&L) notifications to ECHA under CLP Regulation is displayed under this section. Skip navigation Sign in. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. The materials with small quantities of W gave their highest activities in the high temperature range of calcination, indicating the following tendency; the lower the quantity, the higher was the temperature showing the highest activity: 900, 1000, 1100, 1150, and 1250 °C for the materials with 20, 10, 5, 2, and 1 wt.% W, respectively. However, substance notifications in the InfoCard are aggregated independently of the impurities and additives. When information is available in all sources, the first two are displayed as a priority. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. This video is unavailable. The per substance REACH registration status is being calculated and will be made available as soon as possible. The molecular structure is based on structures generated from information available in ECHA’s databases. This website uses cookies to ensure you get the best experience on our websites. The EC Number is the numerical identifier for substances in the EC Inventory. метаоловянная кислота ryšiai: sinonimas – vandenilio trioksostanatas (2–) … Chemijos terminų aiškinamasis žodynas The high activity for the reaction of methanol was kept beyond 8 h of time on stream under flow conditions. The SnO2 is reduced to tin metal by heating at about 2500F with carbon, coke, carbon monoxide, etc. The surface acidity determined by the adsorption heat of Ar and the catalytic activity for decompositions of toluene and ethylbenzene were intermediate between the values for mordenite and for silica–alumina, and the stability to water was high. BPR regulation aims to improve the functioning of the biocidal products market in the EU, while ensuring a high level of protection for humans and the environment. Sulfated and tungstated stannias were prepared from commercial Sn-gels of meta-stannic acids; the former showed catalytic activities higher than those of the materials obtained from conventional gels and of sulfated zirconias.The latter led to the synthesis of a ceramics acid, calcined at >1000 °C, whose catalytic activity and acidity were intermediate between mordenite and silica–alumina. метаоловянная кислота ryšiai: sinonimas – vandenilio trioksostanatas (2–)rūgštis statusas T sritis chemija formulė H₂SnO₃ atitikmenys: angl. This is unique source of information on the chemicals manufactured and imported in Europe. The highest activity for the reactions of methanol and butane was brought out by the sulfation with 3–9 M H2SO4. When you incinerate metastannic acid, SnO2 is produced. metastannic acid rus. Close Find out more on how we use cookies. Metastannic acid agent detailed information in Haz-Map database. the electronic edition of the Official Journal of the European Union. InfoCards are generated automatically based on the data available at the time of generation. It does not represent a new labelling, classification or hazard statement, neither reflect other factors that affect the susceptibility of the effects described, such as duration of exposure or substance concentration (e.g. ECHA organises consultations to get feedback from all interested parties and to gather the widest possible range of scientific information for the regulatory processes. [], and was also used for the initial development of high-accuracy ANLn composite electronic structure methods []. The results led to the synthesis of a ceramic acid, calcined at temperatures above 1000 °C, by impregnating with 5 and 10% W followed by calcining at 1000 or 1100 °C in air. Metastannic acid precipitation? 1, 2] enthalpy of formation based on version 1.118 of the Thermochemical Network This version of ATcT results was partially described in Ruscic et al. Sulfated and tungstated stannias were prepared from commercial Sn-gels of meta-stannic acids; the former showed catalytic activities higher than those of the materials obtained from conventional gels and of sulfated zirconias. 6.Analysis of upstream raw materials, downstream demand, and current market dynamics is also carried out 7.The report makes some important proposals for a new project of Metastannic Acid … Those quantities of S were coincident with their catalytic activities for the reactions of methanol and butane. This section is based on three sources for information (harmonised classification and labelling (CLH), REACH registrations and CLP notifications). To improve your capacity to use lactate as a fuel during exercise, you must increase the lactic acid load very high during training. *Please select more than one item to compare Carbon dioxide, salt, and water are produced when ethanoic acid reacts with carbonates and hydrogen carbonates. 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