I was hoping on suggestions or edits to make it more professional
Suggestions you'll get, edits less likely. People aren't going to do your work for you.
Regarding professional tone, the main issue here is that you word things in ways that don't read smoothly, and tend to be too "action-y" for a scientific report. For example:
When confronted by any living creature that releases CO2 as a byproduct of respiratory organs, the small red painting will begin releasing gas that has been identified as [DATA EXPUNGED].
- Why "confronted"? Why not "in the presence of" or "in contact with" or something that's less emotionally-charged? Besides, it's not like the Foundation tests this sort of thing "only when confronted".
- The "any living creature" bit would be hard to prove. Did the Foundation bring out mice, birds, and aquatic mammals? Keep in mind that as the author, you know the entire story, but the Foundation needs to have discovered what it knows about the SCP through observation and experimentation.
- Correct formatting would be "CO2", but it would probably be "Carbon dioxide" since just saying the shortened version seems kind of casual.
- The "as a byproduct of respiratory organs" bit reads kind of funky because there are big words used unnecessarily. The hallmark of good clinical tone is clear, concise language, not adding in longer words you don't need to make it sound smart.
- Not so much a tone thing here, but the expungment is kind of lazy. You effectively took out the most interesting part of the sentence, and the reader's going to get bored if that happens so often.
In regards to the piece as a whole… You gotta use paragraph breaks. The description is a giant chunk of text that made my eyes glaze over a little, and about three sentences in I didn't want to read the rest because the information was all over the place. Group similar facts together, so the reader can easily follow from one part of the description to the next (like establish what it looks like/is first, then the basic effects, then maybe some detail).
Also, I'm pretty sure this thing is Safe class. If you lock up the sandstone block and no one goes near it, nothing happens, right? Object class is based on difficulty of containment, not potential for danger if someone does a bad job of keeping it locked up.