If you go to Google and type

   "toxicity of biological stains"

you get 143 hits.  There might be some useful information in there somewhere.

And you might even find some useful toxicity, handling and disposal
information in each stain's Material Safety Data Sheet.

Paul
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> Does anyone have any references or documents they can share that discuss
> the relative toxicity, handling, and disposal of various biological
> stains?
>
> Thanks,
>
> Chris