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| CAS No. | 7440-29-1 |
| Chemical Name: | THORIUM |
| Synonyms: | 90Th;Torio;THORIUM;Thorium-232;Chebi:33385;THORIUM STANDARD;Thorium, pyrophoric;thorium metal,pyrophoric;THORIUM SINGLE ELEMENT STANDARD;THORIUM PLASMA EMISSION STANDARD |
| CBNumber: | CB5350759 |
| Molecular Formula: | Th |
| Formula Weight: | 232.04 |
| MOL File: | 7440-29-1.mol |
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| THORIUM Property |
| density : |
1.03 g/mL at 25 °C
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THORIUM Chemical Properties,Usage,Production |
General Description
Silver to grayish radioactive metal. Twice as dense as lead. Radioactive materials emit ionizing radiation, detectable only using special instruments. Exposure to intense levels of radiation or prolonged exposure to low levels can be harmful. Film is also damaged by radiation. |
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Air & Water Reactions
Pyrophoric material, spontaneously ignites in air. |
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Reactivity Profile
THORIUM when heated with chlorine (or sulfur), reacts vigorously with incandescence [Mellor 7:208 1946-47]. When thorium is heated with phosphorus, they unite with incandescence [Svenska Akad. 1829 p.1]. |
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Health Hazard
Radiation presents minimal risk to transport workers, emergency response personnel and the public during transportation accidents. Packaging durability increases as potential hazard of radioactive content increases. Undamaged packages are safe. Contents of damaged packages may cause higher external radiation exposure, or both external and internal radiation exposure if contents are released. Low radiation hazard when material is inside container. If material is released from package or bulk container, hazard will vary from low to moderate. Level of hazard will depend on the type and amount of radioactivity, the kind of material it is in, and/or the surfaces it is on. Some material may be released from packages during accidents of moderate severity but risks to people are not great. Released radioactive materials or contaminated objects usually will be visible if packaging fails. Some exclusive use shipments of bulk and packaged materials will not have "RADIOACTIVE" labels. Placards, markings and shipping papers provide identification. Some packages may have a "RADIOACTIVE" label and a second hazard label. The second hazard is usually greater than the radiation hazard; so follow this GUIDE as well as the response GUIDE for the second hazard class label. Some radioactive materials cannot be detected by commonly available instruments. Runoff from control of cargo fire may cause low-level pollution. |
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| THORIUM Suppliers Global( 16)Suppliers |
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