Calcium Sulfate

What is Calcium Sulfate?

Calcium sulfate, commonly known as gypsum, is a naturally occurring inorganic mineral compound derived from sedimentary rock deposits. In cosmetic formulations, it appears as a fine white powder and serves primarily in cleansing, exfoliating, and oral care products like scrubs, toothpastes, and masks. As an abrasive, it provides mild physical exfoliation by gently buffing away dead skin cells through mechanical action during application. Its bulking properties add volume to formulas, enhancing product thickness and ease of use without altering active performance. Additionally, it functions as an opacifier, reducing transparency to give creams and lotions a smooth, uniform milky appearance that improves visual appeal and hides imperfections in suspensions. This versatile ingredient integrates well into water-based systems and remains stable across typical pH ranges in personal care items.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Abrasive
Provides gentle mechanical exfoliation and polishing, helping remove surface dead skin cells and improve smoothness and slip in scrubs and cleansers.
Bulking agent
Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.
Opacifying agent
Makes a formula less transparent to create a creamy, opaque look; can also help visually mask suspended particles and improve aesthetic uniformity.

Benefits

Offers gentle exfoliation to smooth skin texture in scrubs and cleansers.

Enhances product volume and spreadability for better application feel.

Creates an opaque, creamy look that improves formula aesthetics.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People seeking mild physical exfoliation for daily cleansing routines.
Those with extremely fragile skin prone to micro-abrasions from particles.
Individuals wanting affordable texture enhancers in budget-friendly products.
People preferring chemical-free exfoliants without any particulates.
Users of toothpastes and masks preferring mineral-based opacifiers.
Individuals sensitive to mineral dust in powder-heavy formulas.

Safety Notes

  • Rated low hazard by major cosmetic safety assessors due to inert nature.
  • Non-comedogenic and suitable for most skin types in rinse-off products.

Frequently Asked Questions about Calcium Sulfate

What is calcium sulfate used for in cosmetics?

It acts as an abrasive for exfoliation, bulking agent for volume, and opacifier for creamy appearance in cleansers and scrubs.

Is calcium sulfate safe for skin?

Yes, it is considered safe for cosmetic use with low irritation risk in rinse-off products.

Does it cause acne?

No, it has a comedogenic rating of zero and does not clog pores.