Calcium Sulfate Hydrate
A mineral calcium salt. It thickens and stabilizes the formula and does not affect skin at low levels.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Calcium sulfate hydrate (INCI: Calcium Sulfate Hydrate) is a mineral salt, also known as gypsum. In cosmetics it plays a technical role: it thickens, adds body, and stabilizes the formula, and in powder masks it helps a firm texture set when mixed with water. At use doses it does not act on the skin. This is a functional component, not a skincare active. It does not hydrate, soothe, or treat any condition; it provides structure. The product's effectiveness is judged by its actives, not by this mineral salt. For topical use there is no systemic risk. It can be used during pregnancy and breastfeeding. Tolerance is good, with low irritation and allergy potential, fine for sensitive skin. The component is non-comedogenic. With setting masks it is better to remove them before they harden too much, for comfort rather than safety.
Frequently asked questions
Is Calcium Sulfate Hydrate safe during pregnancy?
Calcium Sulfate Hydrate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Calcium Sulfate Hydrate for?
Calcium Sulfate Hydrate suits: normal, dry, combination, oily, sensitive.
What is Calcium Sulfate Hydrate and what does it do in cosmetics?
A mineral calcium salt.
What's the INCI name for Calcium Sulfate Hydrate?
The INCI name is Calcium Sulfate Hydrate. It may also appear as: Gypsum.
See Calcium Sulfate Hydrate in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Similar role in the formula
Other functional ingredients
Camphor, Candelilla Cera, Candelilla Wax, Capryl/Capramidopropyl Betaine, Eucalyptus Globulus Leaf Oil, Oryza Sativa (Rice) Bran Water, Potassium Chloride, Sucrose Stearate
Published: · updated: