GB No. 43009
CAS No. 7440-39-3
Molecular Formula Ba
molecular 137.33

a shiny silver-white metal, when nitrogen-yellow, with little ductility; the boiling point 1640 ° C; the temperature of 725 ° C; solubility : insoluble inorganic acid, is not soluble in common solvents; density : relative density (water = 1) 3.55; Stability : unstable; risk Marker 10 ( case wet flammable substances); the main purposes : for the manufacture of barium salt, also used Getter, the ball agent and degassing alloy

2. The impact on the environment :
a health hazard

pathways : inhaled, ingested.
health hazards : metal barium almost no toxicity. Barium soluble salt such as barium chloride, barium nitrate, etc. (barium carbonate formation of barium chloride acid case can be absorbed by the digestive tract), food-can occur after severe poisoning, there gastrointestinal symptoms, muscle weakness, cardiac involvement, such as hypokalemia. Respiratory muscle paralysis, myocardial damage can be fatal. Inhalation of barium compounds soluble powder, barium can cause acute poisoning, performance and oral poisoning similar, but less serious gastrointestinal reactions. Long-term exposure to barium compounds workers face salivation, weakness, shortness of breath, swelling and oral mucosal erosion, rhinitis, tachycardia, high blood pressure, and alopecia. Long-term inhalation of insoluble compounds of barium in dust, such as barium sulfate, barium to pneumoconiosis.

two, toxicology information and environmental behavior

hazardous characteristics : low chemical reactivity, heated to a molten state can be spontaneous combustion in the air, but dust can be at room temperature combustion. When heat, flame or chemical reaction can cause a fire and explosion. With water or contact with acid reacted sharply, and cause combustion of hydrogen release. With fluorine, chlorine exposure and dramatic chemical reactions. Case acid or acid will cause a fire explosion.
combustion (decomposition) product : barium oxide.

3. Emergency Monitoring Methods :

4. Laboratory monitoring methods :
potentiometric titration (GB/T14671-93, water)
AAS (GB/T15506-95, water)
AAS "Solid Waste Analysis Evaluation Manual," the China Environmental Monitoring terminus translated

5. Environmental standards :
former Soviet air workshop harmful substances maximum allowable concentration 0.5mg/m3
China (GB/T114848-93) groundwater quality standards (mg / L) Class I 0.01; Type II 0.1; Class III 1.0; category IV 4.0; category V above 4.0
China (to be issued) source water harmful substances maximum allowable concentration 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 : Dust to avoid using cleaner shovel collection in a dry, clean, covered containers. Transfer recovery. Large Leak : plastic sheeting, canvas cover and reduce dispersion. The use of non-transfer tool sparks recovery.

two protective measures

respiratory protection : Most do not need special protection, but suggested that under special circumstances, since wearing suction filtered respirators.
eye protection : Wear protective chemical safety glasses.
physical protection : wear chemical protective clothing.
hand protection : Wear rubber gloves.
other : no smoking scene work. Pay attention to personal hygiene.

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.
Inhalation : rapidly 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 with 2% to 5% sodium hydrosulfite gastric lavage, catharsis. Medical treatment.

fire fighting methods : not water, foam, carbon dioxide, halogenated hydrocarbons (eg 1211 fire extinguishing agent) fire. To use dry graphite powder or other dry powder (of stem sand) fire.