Cobalt Chloride Anhydrous: A Valuable Chemical Compound

Cobalt chloride anhydrous, also known as copper(II) chloride, is a chemical compound with the formula CoCl2. It is a white or light blue powder with a pungent smell and has various applications in the chemical industry. In its pure form, cobalt chloride anhydrous has a purity of 99.5% and trace metals basis, making it suitable for use in research or laboratory experiments.

Cobalt chloride anhydrous is often stored in cool and dry warehouses to prevent exposure to flame and heat. It should be handled gently with masks protection to prevent bag breaking and absorbing the dust. The compound can also be turned into black cupric oxide when exposed to certain conditions.

One of the most significant uses of cobalt chloride anhydrous is as an antipollution material in the bottom of ships, desiccant, catalyst, etc. It is also an important raw material for making nantokite, a type of mineral. Additionally, it can dissolve in water and thin alcohol but not in absolute alcohol.

The compound has several synonyms, including copper sulphate, copper(2+) sulfate hydrate, and cupric sulfate. In its hydrated form, cobalt chloride is a deep purple color, whereas the anhydrous form is pale blue.

Cobalt chloride paper is another valuable application of this compound. When exposed to water, the paper changes from blue to pink due to the hydration/dehydration reaction, making it an effective indicator for the presence of water. The paper can be prepared by dissolving 5g of hydrated cobalt(II) chloride in 100cm3 of water and then drying it in an oven at a temperature no higher than 100°C.

It is essential to handle cobalt chloride papers with care, as they are toxic and may cause sensitization. It is recommended to read the standard health and safety guidance before handling these materials.

In conclusion, cobalt chloride anhydrous is a valuable chemical compound with various applications in the chemical industry. Its unique properties make it useful as an antipollution material, desiccant, catalyst, and raw material for making nantokite. Additionally, its ability to change color when exposed to water makes it an effective indicator for detecting the presence of water.

References

* CLEAPSS Hazcard HC025

* CLEAPSS Recipe Book RB030

* RSC Yusuf Hamied Inspirational Science Programme

* Introductory maths for higher education

* The physics of restoration and conservation