GB No. 61513
CAS No. 7681-49-4
Molecular Formula NaF
molecular 42.00

white powder or crystal, no foul; vapor pressure 0.13kPa (1077 ° C); melting point 993 ° C; the boiling point 1700 ° C; solubility : soluble in water, alcohol-soluble; density : relative density (water = 1) 2.56; Stability : stability; risk Marker 15 (hazardous materials); the main purposes : as insecticides, wood preservatives

2. The impact on the environment
the material to the environment may endanger the water bodies should be given special attention.

a health hazard

pathways : inhaled, ingested.
health hazards : Acute poisoning : more for coverage due. Immediately after the service experienced nausea, vomiting, abdominal pain, diarrhea. Severe shock, difficulty in breathing, cyanosis. May 2 to 4 hours died. Some patients had numbness, muscle paralysis swallowing, hand, foot or limbs twitch muscle spasm.
sodium fluoride dust and steam to stimulate the skin, can cause dermatitis.
chronic effects : may cause skeletal fluorosis.

two, toxicology information and environmental behavior

irritation : Percutaneous rabbits : 500mg (24 hours), the severe stimulation.
subacute and chronic toxicity : fluoride-containing rats to 7 ~ 9ppm feed continuous feeding can cause tooth calcification obstacles, the dose was increased to skeletal changes.
Mutagenicity : microbial mutagenicity : Salmonella typhimurium 1 mg / plate. Cytogenetic analysis : human fibroblasts 20 mg / L, respectively.
death toxicity : rat poisoning by mouth lowest dose (TDL0) : 240mg/kg (pregnant 11 to 14 days), musculoskeletal abnormalities.
cancer : IARC carcinogens comments : people is not clear.

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

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

4. Laboratory monitoring methods
ion selective electrode (GB7484-87, the water, fluoride)
fluorine reagents spectrophotometry (GB7483-87, the water, fluoride)

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) â‘?maximum allowable emission concentrations ( 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) 0.15
3 ~ 6.3 (Table 2); 0.18 ~ 7.5 (Table 1)
â‘?unorganized emissions supervisor Control concentration limits (mg/m3)
0.02 (Table 2); 0.02 (Table 1)
China (GB5048-92), irrigation water quality standards (fluoride) 2.0 ~ 3. ABA / L (water and dry vegetables)
Chinese (GB11607-89) Fisheries water quality standards 1 mg / L (fluoride)
China (GB5749-85) health standards for drinking water 1.0mg / 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 above (fluoride)
China (GHZB1-1999), surface water quality standard (mg / L)
following Class I 1.0; Type II 1.0; Class III 1 .0; category IV 1.5; category V 1.5 (fluoride)
China (GB8978-1996)
sewage discharge standards (mg / L) &
nbsp; an 10; two 10 ~ 20; three 20 ~ 30 (fluoride)

China (GB5058.3-1996), solid waste leaching toxic identification standard 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, wear appropriate dress. Do not direct contact with leakage. Avoid dust with clean shovel collection in a dry, clean, covered containers. If substantial leakage collection shipped to recycling or waste disposal sites.

two protective measures

respiratory protection : concentration in air overweight, they should wear protective masks. Emergency rescue or escape, it is recommended to wear self-contained breathing apparatus.
eye protection : Wear protective chemical safety glasses.
protective clothes : wear appropriate protective clothing.
hand protection : Wear gloves against chemicals.
other : work site prohibit smoking, eating and drinking. After work, take a shower. Dress not to take to non-work areas. Separate storage of toxic pollution by the clothes, 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, mobile water rinse for 10 minutes or 2% sodium bicarbonate solution rinse.
INHALED : from the scene to fresh air. When necessary, respirators. Medical treatment. Fresh into
: sober patients to drink a lot when warm water, the symptoms, as soon as gastric lavage. Medical treatment.

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