i just bought 2 bottles of dipropylene glycol to play around with my mones and wondering how long DPG last? anyone have any idea?

If stored properly(opaque container, no light, cool area or room temp, no/less microbial contamination-With fingers), it should last 24-36 months. I have mones both in dpg and silicone and it still hits like new after 3 1/2 yrs. Stored it properly in closet.

I have perfumes in DPG both with Pheromones and without that are over 6 years old and they are totally fine. And they are roller balls so they have touched skin. According to Mara at Love Potion the perfumes there have a minimum shelf life of 6 years.