Is this something I should be worried about? Got it a couple months ago and it's 100mg/ml so it's the strong stuff and since I'm at about 18mg/ml, it's going to last a while longer.
Thing is, I was mixing up some base liquids (for when I want to just play around with flavours I have a base that's made so that I can dilute it with about 18-20ml of flavouring and get my target strength... I tend to keep at least one 30ml bottle of base on hand at all times.) When I got to the point of adding the nicotine, it was a sort of yellow colour. Not like a yellow like urine but lighter...
Should I be concerned or is this harmless? What about the taste? Anyone notice if yellowing nic-liquid takes on any flavours that might alter the mixes I make?
Your fine. Nicotine oxidizes and turns yellow. It won't harm you.
The nicotine has oxidized. It will taste fine, and there is no harm in using it. The one concern that exists with nic that has oxidized is a reduction in potency. You may want to test it to be sure that it is still 100 mg/ml.