The product came as a powder and needs to be stored at -20 degrees.
It can be diluted in DMSO but I don't know if I should store it still at -20 or other condition.
About Purvalanol A recommended storage limit:
i) 3 years at -20 °C as powder; 2 years at -80 °C in solvent; after: https://www.selleckchem.com/products/purvalanol-a.html https://www.sabbiotech.com/g-146203-Purvalanol-A-S2059.html
ii) 3 years at -20 °C as powder; 1 year at -80 °C in solvent; after: http://www.csnpharm.cn/file/DataSheet.html?csn=CSN11800
iii) either 3 years at -20 °C or 2 years at 4°C as powder; either 6 months at -80 °C or 1 month at -20°C in solvent; after: http://www.probechem.com/
iv) Strictly for purvalanol B ― either 3 years at -20 °C or 2 years at 4°C as powder; either 2 years at -80 °C or 1 month at -20°C in solvent; after: https://www.medchemexpress.com/Purvalanol-B.html
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