PRODUCT Properties
| Melting point: | 1540 °C (lit.) |
| Boiling point: | 2836 °C (lit.) |
| Density | 2.99 g/mL at 25 °C (lit.) |
| solubility | Slowly dissolve in dilute acids. |
| form | powder |
| color | Silver-gray |
| Specific Gravity | 3 |
| Resistivity | 50.5 μΩ-cm, 0°C |
| Water Solubility | Reacts with water. |
| Sensitive | air sensitive |
| Merck | 13,8468 |
| 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) |
| InChIKey | SIXSYDAISGFNSX-UHFFFAOYSA-N |
| CAS DataBase Reference | 7440-20-2(CAS DataBase Reference) |
| EPA Substance Registry System | Scandium (7440-20-2) |
Description and Uses
Scandium was not produced in any quantities until the late 1930s. Its light weight,resistance to corrosion, and high melting point made it especially useful in the aerospaceindustries. In the early 1940s contractors for the U.S. Air Force appropriated almost all of thescandium metal for use in the construction of military aircraft. The pure metal form is produced by the electrolysis of a salt of scandium, ScCl3. The metal has found some other uses in high-intensity lamps that produce a natural spectrum, making it useful for stadium lighting.It is also used in nickel alkaline storage batteries. Several compounds are used as catalysts tospeed up chemical reactions. The radioactive scandium-46 (with a half-life of 83.8 days) emitsbeta radiation. This property makes it useful as a radioactive tracer in the petroleum industryto monitor fractionation products.
Safety
| Symbol(GHS) |  GHS02 |
| Signal word | Danger |
| Hazard statements | H228 |
| Precautionary statements | P210-P240-P241-P280-P370+P378 |
| Hazard Codes | F,T,Xi |
| Risk Statements | 5-11-34-23/24/25-36/37/38-36/38 |
| Safety Statements | 26-28-36/37-7/9-36/37/39-16-43-45-27 |
| RIDADR | UN 3089 4.1/PG 2 |
| WGK Germany | 1 |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 2805304000 |
