I diped fresh end into rooting powder, and it immediately turned red like blood! Did I kill it?

I diped fresh end into rooting powder, and it immediately turned red like blood! Did I kill it?

First, I live in Ankara, Turkey (yes, in the northern hemisphere), and yes, I don't think the dust is not a sign of disease. Because it shares same pot with a pachanoi, and there is no sign of infection on it (no dust or sth. else) Thanks for your interest, I'll try your suggestion.

It's 10cm high. The dust comes from areoles I think (firstly at the top) . And when I brush it, some of the dust flies away, but not all. White thinks that you see still remains. It was like this when I first bought it. No part of the plant seems to be soft or moldy, infact it's quite hard.

What is this dust on areoles especialy on top areoles? Plant is hard and looks healty.

Hi, I wonder what will happen if I graft the top of a TBM (tri. bridgesii monstrose) without an aerole on another cactus. Will it grow as a single plant, or later will it produce new aeroles and then give more pups? Thanks, and sorry for eng. errors if any.