Cobalt Chloride Dihydrate
compound
CoH4Cl2O2
The purple crystal that turns pink when it absorbs moisture from the air
Chemistry teachers use cobalt chloride as a humidity indicator — it shifts from blue to pink as it soaks up water.
Material
Gallery canvas set in a solid wood floating frame.
Frame
Black
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Crystallography
| Catalogue identity | Cobalt chloride dihydrate — C2/m |
| Formula | CoH4Cl2O2 |
| Crystal system | monoclinic |
| Space group | C 1 2/m 1 |
| Lattice (a, b, c) Å | 7.2069, 8.4978, 3.5639 |
| Angles (α, β, γ) ° | 90, 97.6, 90 |
| Density (g/cm³) | 2.546 |
Structure data: Crystallography Open Database · Public domain (CC0)