2024.3.4 - Nora - Does bath bombs expire?

Nearly all the ingredients used to make bath bombs have their expiry date, which means that bath bombs can and will eventually expire.

When talking about the shelf life of a bath bomb, refers to how long it will retain its effectiveness and the length of time you can store it.

The vast majority of bath bombs include ingredients like citric acid and bicarbonate soda (baking soda).  As we explain below, both items have very long expiry dates, although, citric acid will eventually lose its potency.  However, using good storage practices can help to maximise their shelf life.

The fresher your bath bomb, the more likely it is to enjoy its fragrance and effervescence in water.  However, when exposed to moisture or water, bath bombs are likely to undergo an acid-base reaction.

If they are exposed to excessive moisture in the air, this can reduce the amount of effervescence that bath bombs produce in the water and also reduce their effectiveness.