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Nickel Chloride Volatility And Toxicity
- Jul 11, 2017 -

Nickel chloride is a compound of the formula NiCl2. The anhydrous Nickel Chloride is yellow, but it is rare in nature and can only be found in minerals such as chlorine and nickel, and more familiar with the green nickel hexahydrate hexahydrate (NiCl2 6H2O). Nickel chloride also has a series of known hydrates, both green. In general, Nickel Chloride is the most important important source of nickel in chemical synthesis. Nickel salts are carcinogenic.

Nickel chloride hydrate is basically not volatile. But if the skin contact or may be absorbed by the pores, there is carcinogenicity, so we do the experiment when the gloves are protected, and generally will not let it touch the skin, if accidentally touched, then quickly Wash plenty of water.

Nickel chloride tariff rate: 28.27 soluble in water, ethanol, the aqueous solution was slightly acidic. In the dry air is easy to weather, in the moist air easily deliquescence. Heated to 140 ° C above the complete loss of crystal water and yellow brown powder.

Molecular weight 237.69.

Consumption of fixed metal nickel method nickel - containing waste method

Metal nickel (Ni 97%) 0.270

Soda ash (Na2CO3 98%) 0.700

Hydrochloric acid (HCl 31%) 1.100 3.000

Ni - containing waste (in terms of Ni 100%) 0.270

Nitric acid (HNO3 97%) 0.277

In general, the use of hydrochloric acid in large-scale industrial production to remove nickel surface oxide and refined nickel-containing minerals generated by impurities.

Nickel chloride hexahydrate (NiCl2 · 6H2O) is rarely prepared in the laboratory because it is cheap and easy to store for a long time. When heated in thionyl chloride or hydrogen chloride atmosphere, nickel chloride hexahydrate will lose crystal water and return to anhydrous form. It is impossible to obtain anhydrous Nickel Chloride only by heating.

Reaction: NiCl2 · 6H2O + 6 SOCl2 → NiCl2 + 6 SO2 + 12HCl

This dehydration process is accompanied by a change from green to yellow.