Nicotine Propylene Glycol Vegetable Glycerin Acrolein Formaldehyde Acetaldehyde Heavy Metals Flavorings Volatile Organic Compounds Particulate Matter Menthol Benzene Toluene Ethylene Nitrosamines Diethylene Cadmium Arsenic Lead Chromium Copper Zinc Tin Diacetyl Acetoin Acetyl Propionyl Limonene Linalool Benzaldehyde