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.
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
Hazard class
4.1
Packing Group
II; III