Gadolinium , 99.9%, powder , 7440-54-2

Synonym(s):
Gadolinium

CAS NO.：7440-54-2

Empirical Formula: Gd

Molecular Weight: 157.25

MDL number: MFCD00011022

EINECS: 231-162-2

PRODUCT Properties

• Melting point: 1313 °C (lit.)
• Boiling point: 3273 °C (lit.)
• Density: 7.886 g/mL at 25 °C (lit.)
• Flash point: 3266°C
• solubility: soluble in dilute acid solutions
• form: ingot
• color: Silver
• Specific Gravity: 7.898
• Resistivity: 126 μΩ-cm, 20°C
• Water Solubility: Soluble in magnesium and diluted acid. Insoluble in water.
• Sensitive: Air & Moisture Sensitive
• Merck: 13,4347
• Exposure limits: ACGIH: TWA 2 ppm; STEL 4 ppm; OSHA: TWA 2 ppm(5 mg/m3); NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
• Stability: Stable. Powder is highly flammable. Incompatible with strong oxiziding agents, halogens, acids. Powder may react with water or moisture.
• CAS DataBase Reference: 7440-54-2(CAS DataBase Reference)
• EPA Substance Registry System: Gadolinium (7440-54-2)

Description and Uses

Oxide of Gadolinium foil is used in the control rods of some nuclear reactors. It is used as nuclear control rod material. Neutron shielding, phosphor activator, catalyst, scavenger for oxygen in titanium production. A metal element that is used in magnetic resonance imaging (MRI) and other imaging methods. It has been used in making gadolinium yttrium garnets, which have microwave applications.

Safety

• Symbol(GHS): GHS02
• Signal word: Danger
• Hazard statements: H228-H261
• Precautionary statements: P210-P231+P232-P240-P241-P280-P370+P378
• Hazard Codes: F,Xi
• Risk Statements: 15-36/38
• Safety Statements: 43-7/8-26-Neverusewater.
• RIDADR: UN 3208 4.3/PG 3
• WGK Germany: 3
• RTECS: LW3850000
• F: 1
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• HS Code: 2846902015
• Hazardous Substances Data: 7440-54-2(Hazardous Substances Data)