Melting point :1356 °C (lit.)
Boiling point :3230 °C (lit.)
Density :8.234 g/mL at 25 °C (lit.)
form :powder
color :Silver-gray
Specific Gravity :8.234
Resistivity :116 μΩ-cm, 20°C
Water Solubility :Insoluble in water.
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) Stability :Stable, but moisture sensitive. Reacts with halogens, strong acids. The powder is highly flammable.
CAS DataBase Reference :7440-27-9(CAS DataBase Reference)
EPA Substance Registry System :Terbium (7440-27-9)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H228 Flammable solid Flammable solids Category 1 Category 2 Danger Warning P210, P240,P241, P280, P370+P378 H251 Self-heating; may catch fire Self-heating substances and mixtures Category 1 Danger H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H413 May cause long lasting harmful effects to aquatic life Hazardous to the aquatic environment, long-term hazard Category 4
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P235 Keep cool. P240 Ground/bond container and receiving equipment. P273 Avoid release to the environment. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.