A double salt of sodium carbonate and sodium bicarbonate, used as a buffering and cleansing ingredient.
What it is
Sodium sesquicarbonate is a double salt of sodium carbonate and sodium bicarbonate, which occurs naturally as the mineral trona. CosIng lists it as a buffering, bulking and cleansing ingredient.
Where it is used
Found in a small number of products, such as bath salts.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The INCI name does not reveal whether the material was mined or made synthetically.
Functions
- Buffering
- Stabilising the pH of an aqueous medium in a narrow range even if an acid or base is added. Altering and/or maintaining a cosmetic product's pH at the desired level.
- Bulking
- Non-reactive (chemically inert), solid ingredients that dilute other solids and/or increase the volume of cosmetic products.
- Cleansing
- Helping to keep the body surface clean.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.