Freebase nicotine is a highly purified form of nicotine, typically used in e-liquids for vaping. It is the purest form of nicotine, which has been chemically altered to make it more volatile and easier to inhale. Freebase nicotine provides a stronger and faster nicotine hit compared to other nicotine salts, and is commonly found in higher-strength e-liquids. It is known for delivering a sharper throat hit, making it popular among experienced vapers.