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Handling BPC-157 and TB-500 stocks in parallel — labelling discipline

Bench-logistics question, not a stacking question. When I'm working with BPC-157 and TB-500 reconstituted stocks side by side, the two clear solutions look identical in the rack. I nearly pipetted from the wrong one last week.

How do you keep parallel stocks visually distinct? Coloured cap dots? Different rack rows? Curious what's worked for people running more than one compound at the bench.

Coloured cap dots, different rack rows, AND the compound abbreviation on the cap. Three signals because two clear liquids in identical vials is exactly how a mix-up happens.

I never have two reconstituted stocks open on the bench at once. One comes out, gets used, goes back, then the other. Slower, but I've never grabbed the wrong vial.

Both of these are better than my colour-dots-only system. Combining them: one stock out at a time AND distinct cap markings as backup. Updating my SOP, thank you.

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