praseodymium , Powder,99.5%metalsbasis , 7440-10-0

Synonym(s):
;Praseodymium

CAS NO.：7440-10-0

Empirical Formula: Pr

Molecular Weight: 140.91

MDL number: MFCD00011174

EINECS: 231-120-3

PRODUCT Properties

• Melting point: 931 °C (lit.)
• Boiling point: 3520 °C (lit.)
• Density: 6.71 g/mL at 25 °C (lit.)
• storage temp.: Flammables area
• form: powder
• color: White
• Specific Gravity: 6.782
• PH: <1 (20°C in H2O)
• Resistivity: 68 μΩ-cm, 20°C
• Water Solubility: Reacts with water.
• Sensitive: Air & Moisture Sensitive
• Merck: 13,7797
• 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)
• InChI: 1S/Pr
• InChIKey: PUDIUYLPXJFUGB-UHFFFAOYSA-N
• SMILES: [Pr]
• Bulk Modulus: 28.8 GPa
• Hardness, Vickers: 20
• Poissons Ratio: 0.281
• Shear Modulus: 14.8 GPa
• CAS DataBase Reference: 7440-10-0(CAS DataBase Reference)
• EPA Substance Registry System: Praseodymium (7440-10-0)

Description and Uses

Praseodymium’s major use is as an alloying agent along with magnesium to produce highstrengthsteel that is used in airplane engines and automobiles parts. Notwithstanding its greenish color, another important use of praseodymium is as a yellow pigment to color glassand ceramics. Along with several other rare-earths, it is also used to form the electrodes forhigh-intensity arc lamps.
It is used to manufacture safety goggles that filter out strong yellow light (used in welding,for example). Misch metal uses about 5% Pr in the manufacture of cigarette lighter flints.

Safety

• Symbol(GHS): GHS02,GHS07
• Signal word: Danger
• Hazard statements: H250-H315-H319-H413
• Precautionary statements: P210-P231+P232-P273-P302+P352-P305+P351+P338-P370+P378
• Hazard Codes: F,C
• Risk Statements: 17-11-34
• Safety Statements: 17-7/9-33-16-45-36/37/39-27-26-23
• RIDADR: UN 3208 4.3/PG 1
• WGK Germany: 3
• F: 1-10
• TSCA: TSCA listed
• HazardClass: 8
• PackingGroup: III
• HS Code: 28053090
• Storage Class: 13 - Non Combustible Solids