| Identification | |
| Name: | Tungsten atomic absorption standard solution |
| Synonyms: | Tungstenrodmmdiameter; Tungstenpowdermicron; TungstenwireNmmdia; TungstenrodannealedNmmdiacagcm; Tungsten (0.18 m2/g) (nitrogen BET specific surface area); TungstenwireN; TungstenpowderNmesh; TungstenpowderNmicron; Tungsten1; Tungsten2; Tungsten3; Tungsten5; Tungsten4; Tungsten Metal; Tungsten rod annealed 99.98%; Tungsten powder; Tungsten wire 99.95%; Tungsten wire; Tungsten solution 1000 ppm |
| CAS: | 7440-33-7 |
| EINECS: | 231-143-9 |
| Molecular Formula: | W |
| Molecular Weight: | 183.85 |
| InChI: | InChI=1/W |
| Molecular Structure: |  |
| Properties | |
| Transport: | UN 3089 |
| Density: | 19.3 |
| Stability: | Stable. Dust is flammable, though not likely to present a hazard if normal good practice is used. |
| Water Solubility: | insoluble |
| Solubility: | insoluble |
| Appearance: | wire |
| Specification: |
Tungsten (CAS NO.7440-33-7), its Synonyms are VA (tungsten) ; Wolfram ; Tungsten, elemental ; Tungsten, insoluble compounds ; Tungsten, metal and insoluble compounds ; Tungsten, soluble compounds . It is grey metal chunks or grey powder. Tungsten is a steel-gray to tin-white metal. Very pure tungsten can be cut with a hacksaw, forged, spun, drawn, and extruded. Tungsten is often brittle if it impure metal and can be worked only with difficulty.Tungsten is remarkable for its robust physical properties, especially the fact that it has the highest melting point of all the non-alloyed metals and the second highest of all the elements after carbon. Tungsten has the highest melting point of all metals, and at temperatures over 1650oC has the highest tensile strength. The metal oxidizes in air and must be protected at elevated temperatures. It has excellent corrosion resistance and is attacked only slightly by most mineral acids. The thermal expansion is about the same as borosilicate glass, which makes the metal useful for glass-to-metal seals. |
| Report: |
Reported in EPA TSCA Inventory. |
| Packinggroup: | III |
| Storage Temperature: | Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Do not expose to air. Store under an inert atmosphere. |
| Color: | Steel-gray to tin-white metal; body centered cubic structure CRYSTALLINE FORM GRAY-BLACK, CUBIC Hard, brittle, steel-gray to tin-white solid. |
| Usage: | Incr hardness, toughness, elasticity and tensile strength of steel, manufacture alloys, filaments for incandescent lamps and in electron tubes, in contact points for automotive, telegraph, radio and television apparatus, phonograph needles. |
| Safety Data | |
| Hazard Symbols |
F:Flammable
Xi:Irritant
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