WebAbstract: of EP0062736A process is provided for producing 4,4 min -dichlorodiphenyl sulfone, which comprises the steps of (a) reacting a monochlorobenzene with sulfur trioxide in the presence of at least 15 mole percent to 50 mole percent of thionyl chloride, based on the sulfur trioxide, at a temperature from the freezing point of the reactants to 40 DEG C; … WebFormel : CrO3 Molekulargewicht : 99,99 g/mol CAS-Nr. : 1333-82-0 . ... Chromtrioxid 1333-82-0 TWA 0,01 mg/m3 Richtlinie 2004/37/EG über den Schutz der Arbeitnehmer gegen Gefährdung durch Karzinogene oder Mutagene bei der Arbeit Anmerkun gen Karzinogene oder Mutagene

Chrom(VI)-oxid - chemie.de

Webder Position 8504 (a ) ex 2823 00 00 10 Titandioxid, mit einer Reinheit von 99,9 GHT oder mehr, mit einer durchschnittlichen Korngröße 0 von 1,2 µm bis 1,8 µm, zum Herstellen von Waren der Position 8532 oder 8533 (a ) ex 2825 50 00 10 Kupfer(I oder II)oxid mit einem Gehalt an Kupfer von 78 GHT oder mehr und Chlorid von nicht 0 mehr als 0,03 GHT ex … WebChrom (VI)-oxid Synonyms: Chromsäureanhydrid, Chromtrioxid, Chromium (VI) oxide, Chrom (VI)-oxid Empirical Formula (Hill Notation): CrO3 CAS Number: 1333-82-0 … imram tohoku university

Substance Information - ECHA - Europa

Chromium trioxide is generated by treating sodium dichromate with sulfuric acid: H2SO4 + Na2Cr2O7 → 2 CrO3 + Na2SO4 + H2O Approximately 100,000 tonnes are produced annually by this or similar routes. The solid consists of chains of tetrahedrally coordinated chromium atoms that share vertices. … See more Chromium trioxide (also known as chromium(VI) oxide or chromic anhydride) is an inorganic compound with the formula CrO3. It is the acidic anhydride of chromic acid, and is sometimes marketed under the same name. … See more • A concentrated solution of potassium dichromate in water. • Addition of sulfuric acid to the solution. • Crystallization of chromium trioxide from the reaction. • … See more Chromium trioxide is mainly used in chrome plating. It is typically employed with additives that affect the plating process but do not react with the trioxide. The trioxide reacts … See more Chromium trioxide is highly toxic, corrosive, and carcinogenic. It is the main example of hexavalent chromium, an environmental hazard. The related chromium(III) derivatives are not particularly dangerous; thus, reductants are used to destroy … See more • ATSDR Case Studies in Environmental Medicine: Chromium Toxicity U.S. Department of Health and Human Services • Chromium Trioxide at The Periodic Table of Videos (University of Nottingham) See more WebSynonyma: Chemische Bezeichnung: Formel: Molekulargewicht: Schmelzpunkt: Siedepunkt: Dampfdruck bei 20 °C: Chromate MAK Datum der letzten Festsetzung: Formel: 0,1 mg/m3 1958 Chromsäureanhydrid Chromtrioxid Chrom (Vl)-oxid CrO 3 99,99 187.... 198 °C oberhalb 198 °C beginnt Zerfall unter Sauer- stoffspaltung keine Angabe S s. lithium mining in california