Melting point :160℃ -H{2}O
Density :5.598
solubility :insoluble in H2O; soluble in dilute HNO 3
form :Powder
color :white
Water Solubility :Insoluble in water and alkali. Soluble in acids.
Exposure limits :ACGIH: TWA 0.05 mg/m3; TWA 2 mg/m3; STEL 6 mg/m3
NIOSH: IDLH 100 mg/m3; TWA 0.050 mg/m3

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312 H360 May damage fertility or the unborn child Reproductive toxicity Category 1A, 1B Danger H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, 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:	P201 Obtain special instructions before use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P405 Store locked up.