Just bought calcium granules and wondered the best way to store them to stop them oxidising>
In a desiccator over say anhydrous calcium chloride if possible.
I find that even in the original air tight container it slowly oxidises to a white powder,Straight from CLEAPSS
Storage code: FW [Silver-grey metallic granules or
• Calcium: A grey-white oxide layer may form on granules/pieces. Purchase small quantities (eg, 25g) and store in an air-tight container to minimise oxidation.
I agree that it is more useful, but I have lots of anhydrous calcium chloride.I find that even in the original air tight container it slowly oxidises to a white powder,
So I keep mine in it's sealed container in the desiccator with self indicating silica gel as the desiccant
View attachment 4834
Better than Calcium Chloride because you can see when it needs re-drying (orange when dry green when wet)