The Praseodymium, with the cas registry number 7440-10-0, is a kind of yellowish or soft, silvery ductile metal chips. This chemical is usually used as a permanent magnetic materials and non-ferrous alloy additives.

The physical properties of this chemical are below: (1)#H bond acceptors: 0; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 0; (5)Exact Mass: 140.907648; (6)MonoIsotopic Mass: 140.907648; (7)Heavy Atom Count: 1; (8)Melting point: 931 °C(lit.); (9)Boiling point: 3520 °C(lit.); (10)Density : 6.71 g/mL at 25 °C(lit.); (11)Covalently-Bonded Unit Count: 1.

When you are using this chemical, you should be very cautious. For being a kind of highly flammable chemical which may catch fire in contact with air, only needing brief contact with an ignition source, it has a very low flash point or evolve highly flammable gases in contact with water. And it is spontaneously flammable in air.

Therefore, you should take the following advices to protect yourself. Take precautionary measures against static discharges. And keep this chemical away from sources of ignition and combustible material. When store it, keep the container in a cool, dry and well-ventilated place, keeping it tightly closed. Then you could take different measures in different cases. If in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear; When handle it, use spark-proof tools and explosion proof equipment.

Additionally, you could convert the following datas into the molecular structure:
(1)Canonical SMILES: [Pr]
(2)InChI: InChI=1S/Pr
(3)InChIKey: PUDIUYLPXJFUGB-UHFFFAOYSA-N