GB No. 43014
CAS No. 7740-66-6
Molecular Formula Zn
molecular 65.38
; the small light gray powder; vapor pressure 0.13kPa (487 ° C); 419.6 ° C boiling point temperature : 907 ° C; soluble acid, alkali; the relative density (water = 1) 7.13; Stability : unstable; hazard markers : 10 ( case wet flammable substances), 36 (Spontaneous goods); the main purposes : as a catalyst reductant used in organic synthesis and also for preparing non-ferrous metal alloy

2. The impact on the environment :
a health hazard

pathways : inhaled, ingested.
health hazard : inhalation of zinc in the formation of high temperature zinc oxide fumes can be induced metal fume fever, mouth symptoms Series metallic taste, thirst, chest physio flu, dry cough, headache, dizziness, high fever, chills and so on. Dust with ocular irritation. Oral stimulate the gastrointestinal tract. Long-term repeated exposure on the skin irritation.

two, toxicology information and environmental behavior

migration and transformation : natural water soluble zinc in the complex state of existence. Natural zinc in the water quality but also to the end of sediment transport and transformation. Zinc with natural clay minerals in the water association, adsorption in the Japanese box as ion adsorption, absorption in the form of Zn2 +, and ZnCl ZnOH + +. Accompanying this clay minerals zinc sediment migration in the end stroma. Zinc may also form chemical precipitates to the bottom of. Zinc wastewater discharged into natural waters, in alkaline environment generated Zn (OH) 2 catkin sediment migration in the end stroma. Zn2 + and S2-a very pro-together, can also form the small solubility positive ZnS deposition in the end stroma. The results indicate that the end of sediment quality zinc range of 45 ~ 2221ppm average 110ppn, zinc content in water is 10,000 times. Aquatic animals and plants has a strong ability to absorb zinc, zinc in the water causing organisms to move.

Generally, aquatic flora and fauna of the zinc concentration in vivo comparable Aqueous zinc concentrations higher than 1000 ~ 100,000 times. Therefore Eichhornia crassipes, Potamogeton crispus, goldfish grass and duckweed hope for zinc in the sewage purification plant. Zinc in the soil movement depends on the soil pH. Zn in acid soils prone to migration. When the soil is acidic, it was clay minerals of zinc absorption easy release, the soil insoluble hydroxide acid and zinc can role into the soluble state Zn2 +, Zn soil to Zn2 +, easy migration or leaching plant absorption, therefore, the phenomenon of zinc deficiency often in acid soils exist .

zinc concentration of 2 mg / L, the water smell, the concentration of 5 mg / L of water was opaque figure.
right biodegradable impact : water concentration of 1 - 3 mg / L, the biological wastewater treatment inhibited.

hazardous characteristics : with strong reductive. With water, acid or alkali metal hydroxide contact will emit flammable hydrogen. With oxidants, sulfur reaction will cause a fire or explosion. Powder and the air can form explosive mixtures and susceptible to fire ignited explosion, humid dust in the air easily burn their own heat.
combustion (decomposition) product : zinc oxide.

3. Emergency Monitoring Methods :
dipstick; Detection of law "simple, rapid testing manual," Wu Yin compiled
portable colorimeter (Water) (Italy Hana products) < / P>

4. Laboratory monitoring methods :
atomic absorption spectrophotometry Infrared (GB7475-8, Water)
Dithizone spectrophotometry (GB7472-87, water)
AAS "Solid Waste Analysis Evaluation Manual," the China Environmental Monitoring terminus translated

5. Environmental standards :
China (GB5749-85) drinking water standard 1.0 mg / L
Chinese (GB11607-89) fishing water quality standard of 0.1 mg / L
China (3097-1997-1997) water quality standards (mg / L), a category .020; class 2 .050; three .10; four .50
China (GHZB1-1999), surface water quality standards (mg / L) 0.05 Class I; Type II 1.0; Class III 1.0; category IV 1.0; category V 2.0
China (GB/T14848-93) groundwater quality standards (mg / L) 0.05 Class I; Class I 0.5; Class III 1.0; category IV 5.0; category V 5.0 and above
China (GB5048-92), irrigation water quality standards 2.0mg / L (water, vegetables, dry)
China (GB8978-1996) sewage discharge standards (mg / L), a 2.0; two 5.0; three Japanese industrial 5.0
sewage where the fish died in a concentration of the toxic (lethal concentration) 0.13ppm
Chinese (GB15618-1995) soil environmental quality standards (mg / kg) of a 100; two 200 ~ 300; three 500
China (GB4284-84) farm sludge pollution control standards 800mg/kg dry sludge (in acidic soil)
1000mg/kg dry sludge (in the neutral and alkaline soil)
China (GB5058.3-1996) Solid body identification of toxic waste leaching standard value of 50 mg / L

6. Emergency treatment and disposal methods :
a leakage contingency

isolation leak contaminated areas, restricting access. Cut off the fire source. Recommended emergency personnel wearing self-absorption filter respirators, wearing fire protective clothing. Do not direct contact with leakage. A small leak : to avoid dust, the use of non-spark tools in a dry, clean, covered containers. Transfer recovery. Large Leak : plastic sheeting, canvas cover and reduce dispersion. The clearance under the guidance of experts.

two protective measures

Respiratory Protection : operational, it should wear a self-priming filtered respirators. When necessary, proposals to wear air respirators.
eye protection : Wear protective chemical safety glasses.
physical protection : antistatic wear uniforms.
hand protection : Wear protective gloves general operations.
other : work site prohibit smoking, eating and drinking. Work to complete, take a shower. Implementation of pre-employment and periodic medical examinations.

three, and emergency measures

contact with the skin : stripped of contaminated clothing, use soap and water thoroughly washed skin.
eye contact : Did eyelid, mobile or saline irrigation water. Medical treatment.
INHALED : from the scene to fresh air. To keep the airway patency. If breathing is difficult, give oxygen. If breathing stop immediately mouth. Medical treatment. Fresh into
: warm water to drink enough, the symptoms and to seek medical treatment.

fire fighting methods : fire-extinguishing agent : Dry, dry sand. Ban water, fire foam.