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Sodium Chromate
Sodium
Sodium
chromate is the inorganic compound with the formula Na2CrO4. It exists as a yellow hygroscopic solid, which can form tetra-, hexa-, and decahydrates. It is an intermediate in the extraction of chromium from its ores. Sodium
Sodium
chromate, like other hexavalent chromium compounds, is toxic and carcinogenic.[1]Contents1 Production and reactivity1.1 Acid-base behavior2 Uses 3 See also 4 References 5 Further readingProduction and reactivity[edit] It is obtained on a vast scale by roasting chromium ores in air in the presence of sodium carbonate:2Cr2O3 + 4 Na2CO3 + 3 O2 → 4 Na2CrO4 + 4 CO2This process converts the chromium into a water-extractable form, leaving behind iron oxides. Typically calcium carbonate is included in the mixture to improve oxygen access and to keep silicon and aluminium impurities in an insoluble form
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Chemical Nomenclature
A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC). The IUPAC's rules for naming organic and inorganic compounds are contained in two publications, known as the Blue Book[1] and the Red Book,[2] respectively. A third publication, known as the Green Book,[3] describes the recommendations for the use of symbols for physical quantities (in association with the IUPAP), while a fourth, the Gold Book,[4] contains the definitions of a large number of technical terms used in chemistry. Similar compendia exist for biochemistry[5] (the White Book, in association with the IUBMB), analytical chemistry[6] (the Orange Book), macromolecular chemistry[7] (the Purple Book) and clinical chemistry[8] (the Silver Book)
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R34
R34
R34
may refer to: R34 (airship)
R34 (airship)
- British airship that made the first East-West crossing of the Atlantic by air Rule 34 (other)
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Carcinogen
A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis, the formation of cancer. This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes. Several radioactive substances are considered carcinogens, but their carcinogenic activity is attributed to the radiation, for example gamma rays and alpha particles, which they emit. Common examples of non-radioactive carcinogens are inhaled asbestos, certain dioxins, and tobacco smoke
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Mutagen
In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer, mutagens are therefore also likely to be carcinogens, although not always necessarily so. Some chemicals only become mutagenic through cellular processes
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List Of R-phrases
R-phrases (short for Risk Phrases) are defined in Annex III of European Union
European Union
Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations
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R45
R45 may refer to : R45 road (South Africa) R45: May cause cancer, a risk phrase HMS Tenacious (R45), a British Royal Navy World War II T-class destroyer Spectre R45, a sport car a Samsung Sens
Samsung Sens
laptop computer model
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R46
R46 or R-46 may refer to:R-46 (missile), an intercontinental ballistic missile design by the Soviet Union during the Cold War R46 (New York City Subway car), a subway train car R46 road (South Africa) R46: May cause heritable genetic damage, a risk phrase R46 expressway (Czech Republic)
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R60
R60 may refer to : R60 road (Senegal) R60 road (South Africa) R60: May impair fertility, a risk phrase R60 (Mini), an internal designation for a Mini car model BMW R60, a motorcycle Line R60, a commuter rail service on the Llobregat–Anoia Line, in Barcelona, Catalonia, Spain R60, one of the Wheels of Excellence range of Ferris wheel designs by R
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R61
R61 may refer to : R61 road (South Africa) R61 road (Senegal), a regional road R61: May cause harm to the unborn child, a risk phraseThis disambiguation page lists articles associated with the same title formed as a letter-number combination. If an internal link led you here, you may wish to change the link to point directly to the inten
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R21
R21, R-21 or R.21 may refer to:In military HMAS Melbourne (R21), a 1945 Australian Royal Navy ship of the Majestic class of light aircraft carrier R-21 (missile), a submarine-launched ballistic missile developed and deployed by the Soviet Union USS R-21 (SS-98), a 1918 R-class coastal and harbor defense submarine of the United States NavyIn transportation  R21 (New York City Subway car) R21 road (Senegal) R21 road (South Africa) Renault 21, a large family car produced between 19
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R25
R25 may refer to : R25 road (South Africa) R25: Toxic if swallowed, a risk phrase in chemistry Renault R25, a Formula One car entered in the 2005 season Renault 25, an 1980s executive car. R25 (London), a proposed zone 3 orbital railway in Greater LondonR-25 may refer to :USS R-25 (SS-102), a 1918 R-class coastal and harbor defense submarine of the United States Navy R-25 Vulkan, a Yugoslav surface-to-air missile project.This disambiguation page lists articles associated with th
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R26
R26 or R-26 may refer to : R26 (airship), a British airship of the HMA 23 class R-26 (missile), a second-generation intercontinental ballistic missile designed by the Soviet Union R-26 (salon), an artistic salon held at the residence of Parisian socialites Madeleine, Marie-Jacques and Robert Perrier R26 (New York City Subway car) R26 road (South A
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Safety Data Sheet
A safety data sheet (SDS),[1] material safety data sheet (MSDS), or product safety data sheet (PSDS) is an important component of product stewardship, occupational safety and health, and spill-handling procedures. SDS formats can vary from source to source within a country depending on national requirements. SDSs are a widely used system for cataloging information on chemicals, chemical compounds, and chemical mixtures. SDS information may include instructions for the safe use and potential hazards associated with a particular material or product. The SDS should be available for reference in the area where the chemicals are being stored or in use. There is also a duty to properly label substances on the basis of physico-chemical, health or environmental risk
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