GB No. 42006
CAS No. 7440-58-6
Molecular Formula Hf
molecular weight of 178.49

a shiny gray hexagonal crystal; Boil points 4602 ° C melting point 2227 ° C; solubility : soluble hydrofluoric acid, aqua regia and concentrated sulfuric acid; density : relative density (water = 1) 13.31; Stability : stability; risk Marker 9 (Spontaneous goods); the main purposes : primarily for the production of atomic the reactor control rod, but also for air grievances agents and additives < Carbide / P>

2. The impact on the environment :
a health hazard

pathways : inhaled, ingested, percutaneous absorption.
health hazards : eye and skin irritation.

two, toxicology information and environmental behavior

hazardous characteristics : its powder higher chemical activity, exposure to air oxidation reactions occur, or even spontaneous combustion. Case open flame, heat or contact with oxidants, combustion caused a risk of explosion. With fluorine, chlorine can be dramatic chemical reactions.

3. Emergency Monitoring Methods :

4. Laboratory Monitoring Methods : Plasma Spectrometry

AAS "water and wastewater standards test" version 15

5. Environmental standards :
American plant health standards 0.5mg/m3

6. Emergency treatment and disposal methods :
a leakage contingency

isolation leakage polluted area, located around the warning signs, cut off the source of fire. Recommended emergency personnel wearing masks, wearing appropriate dress. To avoid dust, the use of non-spark tools in a dry Clean covered containers, recycling transfer.

two protective measures

respiratory protection : if necessary, should wear respirators.
eye protection : general need special protection.
protective clothing : general need special protection.
hand protection : general need special protection.
other : no smoking scene work.

three, and emergency measures

contact with the skin : mobile water rinse.
eye contact : mobile water rinse.
INHALED : from the scene. Fresh into
: coverage to those who drink large warm water, the symptoms and to seek medical treatment.

fire fighting methods : dry, sandy soil.