I’ve been storing Grubbs 2 catalyst (Sigma Aldrich, M204) inside the glovebox at room temperature for the past 6 months but only been using it extensively for 3 months. I’ve realized recently that the manufacturer recommends to store it long term at 2-8 degrees C. Does Grubbs 2 catalyst degrade at room temperature over an extended period of time even though it is stored in the glove box?