unless your phone is malware laden, i think you'll be ok copying and pasting it on device. just copy text immediately afterwards to clear it from your clipboard.
Discussion
Thanks for the reply Derek. I want to copy it from one device to a web client on another device.
I guess using a password manager is the way to go for that then?
Consider rewriting it manually... The private key isn't that long.
Unless you have keylogger in the new device, this would avoid transfer over Internet.
Thanks nout. Kinda what I figured, appreciate the confirmation.