AFAIK only in specialised low-temp solder, like the one sold by Chip-Quik to desolder sensitive components.

That's Tin-Bismuth eutectic, forming a 99 C (a hair below boiling water) eutectic when mixed with lead.

Take a look for yourself: https://www.digikey.com/catalog/en/partgroup/chip-quik-indiu...

Yeah, but that's not for desoldering. It's for things like soldering heat sinks to flip-chip dies, or hermetic sealing cans for sensitive components.

I'm not surprised by them selling indium solder wire, but they offer all kinds of solder under that brand.

Oh, ok, thanks for the info.