Xanthan Gum

Xanthan Gum — Technical & Clean Standards Overview

Xanthan Gum is a naturally derived polysaccharide produced through the fermentation of sugars by the bacterium Xanthomonas campestris. It appears as a fine to coarse off-white powder with high water solubility and a neutral odor. Xanthan Gum is widely used in cosmetic, personal care, and food applications as a thickening, stabilizing, and suspending agent. Its ability to provide viscosity at low concentrations, stabilize emulsions, and suspend insoluble ingredients makes it a versatile and reliable ingredient in aqueous formulations.

Xanthan Gum is produced via a controlled fermentation process that does not involve parabens, formaldehyde donors, ethoxylation, or petrochemical modification, supporting its inclusion in clean, natural-leaning, and sustainable formulations.

In cosmetic and personal care formulations, Xanthan Gum functions primarily as a rheology modifier and stabilizer. It helps improve texture, prevent phase separation in emulsions, and maintain uniformity of active ingredients. It is compatible with a wide range of pH values (typically pH 3–12) and can be used in lotions, creams, gels, serums, shampoos, conditioners, and masks. Properly formulated, Xanthan Gum provides smooth application, enhances sensory experience, and contributes to product stability without negatively impacting color, fragrance, or active ingredient performance.

From a Clean Standards and safety profile perspective, Xanthan Gum has a long history of safe use and broad regulatory acceptance. It is biodegradable, non-comedogenic, and generally well tolerated by the skin. Its natural origin and compatibility with low-irritation systems make it a preferred thickening agent in sensitive-skin, minimalist, and clean beauty formulations.

Ingredient Identification

INCI Name: Xanthan Gum
CAS Number: 11138-66-2

Physical & Technical Properties

Appearance: Off-white to cream powder
Solubility: Highly soluble in water; insoluble in oils
pH (1% Aqueous Solution): Typically 6.0–8.0
Functional Role: Thickener, stabilizer, rheology modifier

Typical Usage Levels (Skincare & Personal Care)

• Lotions & Creams: 0.1–1.0% (viscosity adjustment, stabilizing emulsions)

• Gels & Serums: 0.2–1.5% (thickening, suspension of actives)

• Shampoos & Conditioners: 0.1–0.5% (viscosity modification, suspension)

• Masks & Other Aqueous Formulations: 0.3–2.0% (texture and stability)

Actual usage levels may vary depending on formulation viscosity target, pH, temperature, and interactions with other thickeners or polymers.

Formulation Compatibility & Common Combinations

Xanthan Gum is commonly formulated with:

• Other natural gums (e.g., Guar Gum, Locust Bean Gum) for synergistic thickening

• Cellulose derivatives (e.g., Hydroxyethylcellulose) for enhanced texture

• Humectants (e.g., Glycerin, Propanediol) to aid hydration and dispersibility

• Emulsifiers in oil-in-water systems to stabilize creams and lotions

Xanthan Gum is typically dispersed into the water phase under vigorous stirring. It hydrates quickly in warm or room temperature water and can form gels even at low concentrations. For optimal performance, other polymers, salts, or pH adjustments should be carefully evaluated to avoid precipitation or viscosity loss.

Regulatory & Safety Notes

• Regulatory Status: Generally recognized as safe (GRAS) for cosmetic and food use

• California Proposition 65: Not listed

• EWG Context: Low hazard, considered safe for cosmetic use

• Irritation & Sensitization: Non-irritating and non-sensitizing at typical usage levels

• Clean Beauty Compatibility: Highly compatible; natural origin, biodegradable, vegan-friendly