The following chemicals have been found in e-cigarettes or vape pens:
1. Nicotine: Nicotine is a stimulant whose main function is to give smokers a sense of pleasure. E-cigarette liquids usually contain different concentrations of nicotine to meet the needs of different smokers.
2. Propylene Glycol: Propylene Glycol is a solvent used to dissolve nicotine and other additives. Vape liquids usually contain a certain concentration of propylene glycol.
3. Vegetable Glycerin: Vegetable glycerin is a humectant and thickener used to improve the taste and viscosity of vape liquid. Some vape liquids may also contain varying concentrations of vegetable glycerin.
4. Water: E-cigarette liquid may contain a certain amount of water to adjust the taste and ingredient concentration.
5. Flavorings/Tinctures: Various flavors or seasonings may be added to e-cigarette liquid to change the taste and smell of the liquid. These flavorings can be natural vanilla, fruit flavors, beverage flavors or other special flavors.
6. Other additives: E-cigarette liquid may also contain other additives, such as natural extracts, vitamin E, etc., to enhance the taste, moisturizing effect or increase nutritional content of the liquid.
It should be noted that different brands and types of e-liquids may have different formulas, and the types and concentrations of chemicals may also vary.
Additionally, not all e-liquids contain all of the chemicals listed above, and some brands may have unique formulas or additives.