After I’ve made a stock solution, can that solution be thawed and refrozen for multiple uses or should it be aliquotted?

Many small molecules are not easily damaged by freeze/thaw cycles.  It is therefore not typically necessary to aliquot stock solutions for stability reasons, although you may do so for convenience if you wish.  Unless the product datasheet specifically warns you to avoid repeated freeze/thaw, it is generally safe to freeze and thaw small molecule products as many times as you wish.

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