Niobium

Formula
Nb
Structure
Description
gray metal, cubic

Registry Numbers and Inventories.
CAS
7440-03-1
EC (EINECS/ELINCS)
231-113-5
RTECS
QT9900000
RTECS class
Other
Merck
12,6648
Beilstein/Gmelin
16213 (G)
Swiss Giftliste 1
G-9576
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
Nb
Formula mass
92.91
Melting point, °C
2468
Boiling point, °C
3700
Density
8.57 g/cm3 (20 C)
Solubility in water
Insoluble
Thermal expansion
7.1E-6/K (20 C)
Heat of fusion
26.8 kJ/mol
Heat of vaporization
715.3 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
Handling
Use spark-proof tools and explosion proof equipment. 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. Remove all sources of ignition. Use a spark-proof tool.
Incompatibilities
Strong oxidizing agents, oxidizing agents, acids, strong bases, halogens.

Fire.
Fire fighting
Wear approved SCBA in full pressure-demand and full protective gear. Flammable solid. Use dry chemical.

Health.
Poison_Class
-
Exposure effects
   Ingestion
May cause irritation of the digestive tract.
   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