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| | Osmium (IV) oxide Basic information |
| Product Name: | Osmium (IV) oxide | | Synonyms: | OSMIUM DIOXIDE;Osmium(IV)oxide,Premion99.99%(metalsbasis),Os83%min;Osmium(IV) oxide, Os 83% min;Osmium (IV) oxide, Premion, 99.99% (metals basis), Os 73.2% min;Osmium(IV)dioxide;ketoosmium;oxoosmium;dioxoosmium | | CAS: | 12036-02-1 | | MF: | O2Os | | MW: | 222.23 | | EINECS: | | | Product Categories: | | | Mol File: | 12036-02-1.mol |  |
| | Osmium (IV) oxide Chemical Properties |
| density | 11.4 | | solubility | insoluble in H2O, acid solutions | | form | Powder | | Specific Gravity | 11.4 | | color | Black | | Water Solubility | Slightly soluble in cold water. | | Crystal Structure | Rutile type | | crystal system | square | | Space group | P42/mnm | | Lattice constant | | a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.4503 | 0.4503 | 0.3184 | 90 | 90 | 90 | 0.0646 |
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| | Osmium (IV) oxide Usage And Synthesis |
| Chemical Properties |
Osmium (IV) oxide is a dark bluish black powder(s), with rutile crystal(s) form [KIR82] [ALD94]. Insoluble in water and acids. Forms OsO4 on heating in air; readily reduced to the metal by H2.
| | Uses | The osmium oxide/hexacyanoruthenate films modified electrodes plays an important role for the electrocatalytic reaction of catecholamines and sulfur oxoanions. Used as catalyst. Metallic osmium or an osmium oxide-ruthenium cyanide film modified graphite electrodes plays an essential role for the determination of biogenic amines from electrocatalytic responses. | | Preparation | Osmium (VIII) oxide is reduced in the cold by a stream of H2. If, however, the OsO4 is heated in the H2 stream, the product is the metal. Osmium (IV) oxide can also be prepared by heating a fine powder consisting of a mixture of K2OsCl3 and three times its amount of Na2C03. The temperature should be lower than red heat; the cooled product is extracted with water which is slightly acidified with dilute hydrochloric acid. The product is perfectly pure OsO2. | | Safety Profile | Brown or black crystals. Amorphous form can explode spontaneously in air. When heated to decomposition it emits toxic fumes of Os. | | Structure and conformation | Crystal structure of Osmium (IV) oxide: rutile type.
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| | Osmium (IV) oxide Preparation Products And Raw materials |
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