I am looking for a resource with some general recommendations about how to dispose of some common reagents used in the lab. We have our chemical wastes removed by an external contractor and they have complained about the very small volume of some items (implying it was a bother). We simply don't produce enough waste of some of these solutions, otherwise we'd be collecting for a decade to be within the acceptable range of volume. To be clear, this contractor has no minimum volume stated anywhere.
Specifically, I'm talking about things like old 10% ammonium persulfate and TEMED that didn't get used up for SDS-PAGE, 200mM IPTG that was left at room temperature, buffers containing very small amounts of pH indicators, etc. Can they be autoclaved? Polymerized? Another simple chemical treatment that can be done with little equipment?
I find it frustrating that every single SDS I've looked at has a "Waste Disposal" section that only says "follow local laws" - it is probably legally important to say, but also supremely unhelpful. Thanks for any help you're able to give!!
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