GB No. 61514
CAS No. 16893-85-9
Molecular Formula molecular Na₂SiF₆
Particle Composition 188.06

white powder, odorless and tasteless, humidity; vapor pressure; melting point; solubility : Micro-water soluble, non-soluble in ethanol, dissolved in ether; density : relative density (water = 1) 2.68 ; Stability : stability; danger signs 14 (drugs); the main purposes : creamy white enamel used for agricultural pesticides, wood preservatives

2. The impact on the environment :
a health hazard

pathways : inhaled, ingested.
health hazards : coverage of acute gastroenteritis caused by acute poisoning-like symptoms. They can be deadly. Contact with the skin can be induced dermatitis or chapped.

two, toxicology information and environmental behavior

hazardous characteristics : high fever, or by contact with acid or acid mist emit toxic smoke.
combustion (decomposition) products : hydrogen fluoride, silicon oxide, sodium oxide.

3. Emergency Monitoring Methods :

4. Laboratory monitoring methods :
ion selective electrode (GB7484-87, the water, fluoride)
lime filter-fluoride ion selective electrode (GB/T15433-95, air, Fluoride)

5. Environmental standards :
China (TJ36-79) Workshop harmful substances in the air that the maximum allowable concentration 1mg (F) / m3
the former Soviet Union (1975) neighborhood atmosphere maximum allowable concentration of 0. 03mg/m3 (max); -108.9 (days average)

6. Emergency treatment and disposal methods :
a leakage disposal

isolation leakage polluted area, located around the warning signs, emergency personnel wearing gas masks, chemical protective clothing to wear. Do not direct contact with leakage, in ensuring the safety of plugging. Avoid dust with clean shovel collection in a dry cleaner in covered containers, abandoned places in the exclusive deep burial. If large spills, recycling or collection of sound waste treatment.

two protective measures

engineering controls : closed operation, local exhaust ventilation.
respiratory protection : Workers should wear dust masks. The higher concentration in air, it is recommended to wear gas masks.
eye protection : Wear protective chemical safety glasses.
protective clothing : wearing overalls.
hand protection : Wear rubber gloves.
other : work, take a shower. Pay attention to personal hygiene.

three, and emergency measures

contact with the skin : contaminated clothing off and spent a lot of water flow thorough Dr Chong.
eye contact : immediately open from top to bottom eyelid, mobile or saline irrigation water. Medical treatment.
Inhalation : rapidly from the scene to fresh air. To keep the airway patency. Difficult to breathe oxygen. Stop breathing, artificial resuscitation immediately. Medical treatment. Fresh into
: to blues or egg white. Medical treatment.

fire fighting methods : water, sand, dry powder, carbon dioxide.