7440-27-9
| Name | TERBIUM |
| CAS | 7440-27-9 |
| EINECS(EC#) | 231-137-6 |
| Molecular Formula | Tb |
| MDL Number | MFCD00011256 |
| Molecular Weight | 158.93 |
| MOL File | 7440-27-9.mol |
Chemical Properties
| Definition | Atomic number 65, group IIIB of the periodic table, a rare-earth element of the yttrium subgroup (lanthanide series), aw 158.9254, valences of 3, 4; no stable isotopes. |
| Appearance | silvery-white chip or ingot, or grey powder |
| Melting point | 1356 °C (lit.) |
| Boiling point | 3230 °C (lit.) |
| density | 8.234 g/mL at 25 °C(lit.) |
| storage temp. | 15-25°C |
| form | powder |
| color | Silver-gray |
| Specific Gravity | 8.234 |
| PH | 0.5 (20°C in H2O) |
| Stability: | Stable, but moisture sensitive. Reacts with halogens, strong acids. The powder is highly flammable. |
| Resistivity | 116 μΩ-cm, 20°C |
| Electrical Conductivity | 830000 S/m |
| Water Solubility | Insoluble in water. |
| Specific Heat Capacity | Cp(crystal):0.181841J/(g·K);Cp(gas):0.154785J/(g·K),at 25℃ |
| Thermal Conductivity | 11 W/(m·K) |
| Sensitive | Air & Moisture Sensitive |
| Merck | 13,9232 |
| 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) |
Safety Data
| Hazard Codes | F,T |
| Risk Statements | |
| Safety Statements | |
| RIDADR | UN 3089 4.1/PG 2 |
| WGK Germany | 3 |
| TSCA | Yes |
| REACH Registrations | Active |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 28053013 |
| Storage Class | 4.2 - Pyrophoric and self-heating hazardous materials |
| Hazard Classifications | Aquatic Chronic 4 Eye Irrit. 2 Flam. Sol. 2 Self-heat. 1 Skin Irrit. 2 |
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