The main components of bath bombs are citric acid and baking soda. They will produce carbon dioxide after mixing with water in a certain proportion, which is the “explosion” effect we see. The chemical reaction formula is as follows:
Citric acid + sodium bicarbonate → sodium citrate + water + carbon dioxide
C6H8O7 + 2 NaHCO3→Na2C6H6O7(aq)+ 2H2O(l)+ 2CO2(g)
If you say: Baking soda is bad for the skin because of its high pH. Alkaline products can disturb the acid film of the skin, and cause the human body to be affected by the environment, especially bacteria. But don’t forget the citric acid. When it reacts with baking soda, the pH is neutral.
Then you only know one thing and don’t know the other.
Of course, essential oils could be added to the bath fizzer formula, such as lavender essential oil, hemp seed oil, rose essential oil, etc., to achieve a better beauty result; at the same time, fragrance oil also is added to make the bath fizzer exude a fragrance. In this way, when bathing, the bath fizzer’s color and sparkle – hissed and combined with the heat of the hot water, the smell is released more quickly and the whole bathroom is full of nice smell.
When placed in a humid environment, the bath fizzer will slowly absorb water in the air and release carbon dioxide-this is why some bath bombs have less foam! So please make sure that the bath fizzer is kept in a dry place for a better bathing effect.
The last para. said the bath fizzer will absorb H2O from the environment and release CO2. What is the chemcial equation?
In my case, the bath fizzer is wrapped in plastic material , still seems the explosion power is diminished after a period of time, what is the reason? How to prevent?
Here is the equation: NaHCO3+Cl2→NaCl+H2CO3. The stability of the formula and the storage environment will effect the fizzing performance, especially the enviroment, it’s better to store your bath bomb in a dry and cool enviroment.