I bought some 2x4s from homedepot. Took a picture of the stamp. How can you tell if it's treated or not? Is it safe for indoor furniture project?
Easy way: did you buy it INSIDE the store? - then it's not PT - they store that out where it can stay nice and wet.
That's a KD (kiln dried) stud - it's not PT. It's not greenish, as well, which is a somewhat blatant clue.