Melting point :34 °C
Boiling point :960°C
Density :3.327
vapor density :6.3 (vs air)
vapor pressure :10 mmHg ( 656 °C)
refractive index :1.6513
solubility :soluble in acetone
form :Crystals and Chunks
color :White
Specific Gravity :4.047
PH :pH (50g/l, 25℃) : 4.0～7.0
Water Solubility :1680 g/L (20 ºC)
Sensitive :Hygroscopic
Merck :14,1617
Exposure limits :ACGIH: TWA 0.01 mg/m3; TWA 0.002 mg/m3
NIOSH: IDLH 9 mg/m3 Stability :Stable. Incompatible with oxidizing agents. Air sensitive. Reacts violently with potassium.
CAS DataBase Reference :7790-78-5(CAS DataBase Reference)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501 H340 May cause genetic defects Germ cell mutagenicity Category 1A, 1B Danger H350 May cause cancer Carcinogenicity Category 1A, 1B Danger H360 May damage fertility or the unborn child Reproductive toxicity Category 1A, 1B Danger H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P273 Avoid release to the environment.