Praseodymium

Formula
Pr
Structure
Description
silvery metal, hexagonal

Registry Numbers and Inventories.
CAS
7440-10-0
EC (EINECS/ELINCS)
231-120-3
Merck
12,7891
Beilstein/Gmelin
16238 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
Pr
Formula mass
140.91
Melting point, °C
935
Boiling point, °C
3127
Vapor pressure, mmHg
0.1 (1730 C)
Density
6.475 g/cm3 (20 C)
Viscosity
0.0269 P (1000 C)
Thermal expansion
6.79E-6/K (25 C)
Heat of vaporization
296.6 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container. Keep under an argon blanket.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Protection
Wear appropriate protective eyeglasses or chemical safety goggles, protective gloves and clothing to prevent exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container.
Incompatibilities
Halogens, oxidizing agents, water, strong oxidizing agents, strong acids.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Fire fighting
Wear approved SCBA in full pressure-demand and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. Use dry chemical to fight fire.

Health.
Exposure effects
   Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Get medical aid. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids. Get medical aid.

Transport.
USCG CHRIS Code
xx