CORN STARCH

Bulk Corn Starch for Cosmetic Formulation

Corn starch, listed under the INCI name Zea Mays Starch, is a widely used raw material in cosmetic formulation thanks to its absorbent power and smoothing skin feel. This guide covers what this fine white powder derived from corn is, its basic composition, and the most common cosmetic applications for which formulators and artisan soap makers source it in bulk from Royal Bio.

What is Corn Starch (Zea Mays Starch)?

Corn starch is a fine white powder obtained from corn kernels through wet-milling processes that separate the starch from the rest of the grain's components. Its composition is mainly amylose and amylopectin, two carbohydrates responsible for its characteristic texture, with possible trace amounts of proteins, lipids and minerals naturally present in the plant material.

In cosmetics, the question of what Zea Mays Starch is comes down to its functional properties: strong moisture and sebum absorption, plus a silky feel that improves the sensory profile of emulsions and powders. These traits make it a versatile ingredient for formulators seeking natural alternatives to synthetic absorbents.

Main Cosmetic Uses of Corn Starch

Facial and pressed powders. Its fineness and absorbency make it a common base for mattifying powders and pressed compacts, helping control skin shine without leaving a greasy residue.

Cream and emulsion formulation. It works as a natural thickener and stabilizer in creams, improving final texture and giving a silky finish, especially valued in formulas for oily or combination skin.

Mineral and powder makeup. It is added to eyeshadows, blushes and mineral foundations as a filler and slip agent, allowing for smoother, more even application on skin.

Natural deodorants. Thanks to its strong moisture absorption, it is a frequent ingredient in powder or stick deodorants formulated without aluminum salts, helping maintain a dry feel throughout the day.

CAS: 9005-25-8. EINECS: 232-940-4. INCI: Zea Mays Starch.