Yttrium | |
| Formula | Y |
| Structure | |
| Description | Iron-gray powder that darkens on exposure to air. |
| Uses | Yttrium doped with rare earths as phosphors for color television receivers. |
| Registry Numbers and Inventories. | |
| CAS | 7440-65-5 |
| EC (EINECS/ELINCS) | 231-174-8 |
| RTECS | ZG2980000 |
| RTECS class | Other |
| UN (DOT) | 3089 |
| Merck | 12,10240 |
| Beilstein/Gmelin | 16319 (G) |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| New Zealand | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | Y |
| Formula mass | 88.90 |
| Melting point, °C | 1525 |
| Boiling point, °C | 2927 |
| Vapor pressure, mmHg | 0.00000075 (1117 C) |
| Density | 4.472 g/cm3 (20 C) |
| Solubility in water | Insoluble |
| Thermal expansion | 0.000028/K |
| Heat of fusion | 11.23 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage. |
| Handling | All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood. |
| Protection | Wear appropriate protective gloves, clothing and goggles. |
| Respirators | Wear positive pressure self-contained breathing apparatus (SCBA). |
| Small spills/leaks | ELIMINATE all ignition sources. Do not touch or walk through spilled material. Stop leak if you can do it without risk. |
| Stability | No data. |
| Fire. | ||||
| Fire fighting | DO NOT USE WATER, FOAM OR carbon dioxide. Dousing metallic fires with water may generate hydrogen gas, an extremely dangerous explosion hazard, particularly if fire is in a confined environment. Use DRY sand, graphite powder, dry sodium chloride based extinguishers, G-1 or Met-L-X powder. Confining and smothering metal fires is preferable rather than applying water. | |||
| Hazards | Oxides from metallic fires are a severe health hazard. Fire may produce irritating, corrosive and/or toxic gases. | |||
| NFPA | Health | - | ||
| Flammability | 2 | |||
| Health. | |
| Exposure limit(s) | NIOSH REL*: TWA 1 mg/m3 [*Note: The REL also applies to other yttrium compounds (as Y).] OSHA PEL*: TWA 1 mg/m3 [*Note: The PEL also applies to other yttrium compounds (as Y).] IDLH 500 mg/m3 (as Y) |
| Exposure effects | |
| Ingestion | See Inhalation. |
| Inhalation | Substance or decomposition products may cause severe injury or death. |
| Skin | See Inhalation. |
| Eyes | See Inhalation. |
First aid |
|
| Ingestion | Seek medical assistance. |
| Inhalation | Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. |
| Skin | Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. |
| Eyes | Immediately flush with running water for at least 20 minutes. |
| Transport. | ||
| UN number | 3089 | |
| Response guide | 170 | |
| Hazard class | 4.1 | |
| Packing Group | II; III | |