How long do they stay on the Shelf and are they Temporary like the experimones and MXs?
Temporary.
There are some that AD stopped stocking them and some that are still produced.
P74, P75, P79, P83, P86, P93, P96, P106, P130 are the ones that been re-stocked it’s been forever. Few others come and go.
Putatives have been around. Few come and go because of rolling blackouts, not cause they want to stop producing them.
While the statement is partially true, that only goes for the case that if the Chemist does not make the chemical anymore will that putative no longer be stocked. It’s not an MX (a mix of molecules) but rather testing for pheromone like effects.
Its basically a crap shoot LOL
They come and go and come back again depending on whats being researched and whats available to AD.
Tisha
Oh ok was just wondering. Because I am almost out of my p83. I definitely will be needing another bottle. P83 is an amazing product not going to lie.
Good Goddess… almost out of P83 
Seriously though I love that one and always make sure I am fully stocked. I dont want to run out of that puppy in case the molecule blackout spreads.
Tisha
Tell me about it!
I always mention re-stocks in the Store Announcements & Feedback section, so keep your eyes on there every once in awhile.
We do our best to keep things stocked, but like everyone above has said its dependent on chemists and blackouts of molecules.
I think only a couple actual putative have gone away, others we are just waiting on synthesis. We don’t get our putative from a regular supplier, the chemist synthesizes them on demand. Maybe on demand is not the right term. More like - when it happens, it happens. haha
But seriously, its an on going function for us to attempt to keep everything in stock as far as these molecules go, but you’ll see scattered through the forum that the range of P’s are difficult to keep around.