Pure nicotine can be clear, or yellow. it can be strong in smell or very light.
nicotine oxidizes once one of its 4 enemies comes in contact with it. What are nicotine's 4 enemies?
- Water
- Oxygen
- Light
- Heat
the moment you open your nic bottle when you receive it in the mail it starts the oxidization process. Once nicotine oxidizes it turns into a yellow, rusty, or even pink color.
If you open your nic bottle after receiving it in the mail.. use some, then shake it, you will automatically oxidize your whole bottle because once you opened the bottle you let in light, moisture from the environment, and oxygen. And so of course when you shake it, it just oxidizes faster.
I have noticed that nicotine oxidizes quicker in VG. I have also noticed that most of the time nicotine will be clear in low strengths. Even if its oxidized because of how diluted it is with PG or VG. However, you will see more of a color the stronger the nic base is. Sometimes you will get a bottle of 100mg @ 500mls and it will be clear also, thats because it has not been oxidized that much and its been taken care of in the
sense of keeping it away from it 4 enemies.
Just because your nicotine is oxidized, doesn't mean its gone bad. Nicotine does not spoil like a carton of milk. Normally i would give a shelf life of about a year for nicotine before i test it again. But if the nic has been stored properly and none of the 4 enemies has gotten to your bottle then it should stay the same as when you first got your bottle. Even after a year has passed.
To answer your question about transferring VG, all you need is a 14g blunt needle tip and a big syringe.. its the best way to transfer from one bottle to another without making a big mess.
