Baking soda

Sodium bicarbonate, commonly known as drinking soda or baking soda, is a crucial ingredient in bath bombs, providing the characteristic fizz that many enjoy. When sodium bicarbonate is mixed with citric acid and comes into contact with water, it triggers a chemical reaction that releases carbon dioxide gas, creating the effervescent effect. This reaction not only contributes to the sensory pleasure of a bath bomb but also helps to disperse other ingredients like essential oils, colors, and scents throughout the bathwater. Additionally, sodium bicarbonate has mild cleansing properties, which can contribute to the overall bathing experience by softening the water and aiding in the removal of impurities from the skin. The inclusion of cornstarch or potato starch in many bath bomb recipes serves to slow down the reaction, ensuring that the fizzing lasts longer, enhancing the user's experience.