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  2. Cobalt (II) chloride - Wikipedia

    en.wikipedia.org/wiki/Cobalt(II)_chloride

    Cobalt(II) chloride is an inorganic compound, a salt of cobalt and chlorine, ... If the partial pressure of the water vapor is in equilibrium with the solid, as in a ...

  3. Cobalt compounds - Wikipedia

    en.wikipedia.org/wiki/Cobalt_compounds

    Anhydrous cobalt(II) chloride is blue, while the hexahydrate is magenta in colour. [1] Because the color change of cobalt(II) chloride in different hydrates, it can be used to manufacture color-changing silica gel. Anhydrous cobalt halides react with nitric oxide at 70~120 °C to generate [Co(NO) 2 X] 2 (X = Cl, Br or I).

  4. Cobalt(III) chloride - Wikipedia

    en.wikipedia.org/wiki/Cobalt(III)_chloride

    Cobalt(III) chloride or cobaltic chloride is an unstable and elusive compound of cobalt and chlorine with formula CoCl 3. In this compound, the cobalt atoms have a formal charge of +3. [1] The compound has been reported to exist in the gas phase at high temperatures, in equilibrium with cobalt(II) chloride and chlorine gas.

  5. Color of chemicals - Wikipedia

    en.wikipedia.org/wiki/Color_of_chemicals

    Predicting the color of a compound can be extremely complicated. Some examples include: Cobalt chloride is pink or blue depending on the state of hydration (blue dry, pink with water) so it is used as a moisture indicator in silica gel. Zinc oxide is white, but at higher temperatures becomes yellow, returning to white as it cools.

  6. Cobalt chloride - Wikipedia

    en.wikipedia.org/wiki/Cobalt_chloride

    Cobalt chloride (cobalt paper) may refer to: Cobalt(II) chloride (CoCl 2) Cobalt(III) chloride (CoCl 3 This page was last edited on 21 February ...

  7. Humidity indicator card - Wikipedia

    en.wikipedia.org/wiki/Humidity_indicator_card

    The cobalt based HIC producers says that if a humidity indicator is considered an article in the EC definition and therefore has no labeling requirements if the content of cobalt(II) chloride by weight is <0.25%. The T (toxic) and R49 (may cause cancer if inhaled) is not applicable because a humidity indicator cannot be inhaled.

  8. Why 'Cosmic Cobalt' Is Our Color of the Year for 2025

    www.aol.com/lifestyle/why-cosmic-cobalt-color...

    Cosmic Cobalt has been a favorite color for artists of every era. Getty Images/Wikimedia Commons Artists throughout history—from Vermeer and Klimt to Miro and Mondrian—have used the color ...

  9. Metal aquo complex - Wikipedia

    en.wikipedia.org/wiki/Metal_aquo_complex

    Structure of [Co 2 (OH 2) 10] 4+ color code: red = O, white = H, blue = Co. In the binuclear ion [Co 2 (OH 2) 10] 4+ each bridging water molecule donates one pair of electrons to one cobalt ion and another pair to the other cobalt ion. The Co-O (bridging) bond lengths are 213 picometers, and the Co-O (terminal) bond lengths are 10 pm shorter.