GB No. 61513
CAS No. 7783-46-2
Molecular Formula PbF₂
molecular 245.20

or white crystalline powder; vapor pressure 1.33kPa.Conclusion (904 ° C); the temperature of 855 ° C; the boiling point 1293 ° C; solubility : water-soluble and insoluble acid, hydrofluoric acid, dissolved in nitric acid; density : relative density (water = 1) 8.24 ; Stability : stability; risk Marker 15 (hazardous materials); the main purposes : for infrared spectrophotometry materials and synchrotron materials, welding agents desulfurizer

2. The impact on the environment
a health hazard

pathways : inhaled, ingested.
health hazards : two lead fluoride right mucosa, respiratory tract, eyes and skin have a strong stimulating effect. Inhalation may cause throat and bronchial inflammation, edema, convulsions and chemical pneumonia, pulmonary edema and death. Poisoning performance burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting.
chronic effects : kidney damage, can cause nervous system dysfunction. Lead on the reproductive function, embryonic, fetal and postnatal development of adverse effects have caused reduction of serum calcium, skeletal fluorosis springing occurred.

two, toxicology information and environmental behavior

hazardous characteristics : no special combustion characteristics of the explosion.
combustion (decomposition) products : hydrogen fluoride, lead oxide.

3. Scene emergency monitoring methods
speed measurement tube; Ion selective electrode

4. Laboratory monitoring methods
ion selective electrode (GB7484-87, the water, fluoride)
membrane fluoride ion selective electrode (GB/T15434-95 air, and fluoride)
Dithizone colorimetry; which flame atomic absorption spectrometry; graphite Furnace Atomic Absorption Spectrometry

5. Environmental standards
China (TJ36-79) Workshop harmful substances in the air that the maximum allowable concentration 1mg/m3 [F]
China (TJ36-79) settlements atmosphere of the most hazardous substances high permissible concentration (fluoride) 0.02mg/m3 (a value)
0.007mg/m3 (days average)
Chinese (GB16297-1996) Air Pollutant Discharge Standards (fluoride), the maximum allowed â‘?emissions concentration (mg/m3) :
9 ~ 90 (Table 2); 11 to 100 (Table 1)
â‘?maximum allowable emission rate (kg / h) : 0.10
2 ~ 4.2 (Table 2); 0.12 ~ 4.9 (Table 1)
3 ~ .3 0.15 (Table 2); 0.18 ~ 7.5 (Table 1) 0.02 (Table 2); 0.02 (Table 1)
China (GB5048-92), irrigation water quality standards (fluoride) 2 .0 - 3.0mg / L (water and dry vegetables)
Chinese (GB11607-89) Fisheries water quality standards 1 mg / L (fluoride)
China (GB5749-85) of water life the standard 1.0 mg / L (fluoride)
China (GB/T14848-93) groundwater quality standards (mg / L) Class I 1.0; Type II 1.0; Class III 1.0; category IV 2 .0; category V 2.0 and above (fluoride)
China (GHZB1-1999), surface water quality standard (mg / L)
following Class I 1.0; Class II 1. 0; Class III 1.0; category IV 1.5; category V 1.5 (fluoride)
China (GB8978-1996)
sewage discharge standards (mg / L)
a 10; two 10 ~ 20; three 20 ~ 30 (fluoride)

China (GB5058.3-1996), solid waste leaching toxic Identification Standard prospective value of 50 mg / L (fluoride)

6. Emergency treatment and disposal methods
a leakage contingency

isolation leakage polluted area, located around the warning signs, the proposed emergency personnel wearing gas masks, chemical protective clothing to wear. Do not direct contact with leakage. Avoid dust with clean shovel collection in a dry, clean, covered containers, using sodium carbonate dissolved in water and which, if not completely dissolved before adding with a little hydrochloric acid and sodium carbonate were, and then use the calcium chloride. If substantial leakage collection shipped to recycling or waste disposal sites.

two protective measures

respiratory protection : Workers should wear dust masks. If necessary, wear gas masks.
eye protection : if necessary, wearing chemical protective safety glasses.
protective clothes : wear appropriate protective clothing.
hand protection : if necessary, wear protective gloves.
other : work site prohibit smoking, eating and drinking. Work completed, take a bath. Implementation of pre-employment and periodic medical examinations. Separate storage of contaminated clothing, washed standby. To maintain good health habits.

three, and emergency measures

contact with the skin : stripped of contaminated clothing, immediately mobile water thoroughly washed.
eye contact : immediately filed eyelid, with a large number of mobile water thoroughly washed. Medical treatment.
INHALED : from the scene to fresh air. When necessary, respirators. Medical treatment. Fresh into
: coverage to persons or egg white blues. Water or sodium thiosulfate solution gastric lavage. Catharsis. Medical treatment.

fire fighting methods : Unburning. Available around the fire extinguishing media.