Kaolin USP
Gentle White Clay
Gentle clay that absorbs oil and gives a silky texture.
TECHNICAL DATA
INCI Kaolin
No. CAS 1332-58-7
Facial masks 20 – 70 %
Loose or pressed powders 5 – 40 %
Dry shampoo 5 – 25 %
Creams and lotions 1 – 10 %
Powder deodorants 10 – 50 %
Gentle scrubs 5 – 30 %
Solid soaps 3–15 % · Liquid makeup (BB/CC creams, foundations): 1–5 %
Appearance Fine powder, white or slightly beige · pH (10 % suspension): 4.0–6.0
Bulk density 2.6 g/cm³
Melting point > 1700 °C
Solubility Insoluble in water and organic solvents
Particle size Variable, generally < 2 microns
FUNCTION
Hydrated aluminum silicateKaolin works through physical adsorption (oilsWaterImpurities)Its gentle particle size allows it to act as a purifying agentProtector. Its technical function is that of an absorbent agentOpacifierTexturizerSoothingHighly valued in natural cosmetics
APPLICATIONS
MasksFace powdersDeodorantsSoaps
Face masks: Absorbs excess oil and impurities; purifying.
Face and pressed powders: Mattifying and texturizing agent.
Dry shampoos: Absorbs excess oil on the scalp.
Powder deodorants: Absorbent and softening agent.
Products for sensitive skin: Softens and soothes irritated-looking skin.
Gentle scrubs: Thanks to its fine, non-abrasive texture.
DESCRIPTION
Kaolin Clay (White)
Kaolin is a white clay composed mainly of hydrated aluminum silicate. It is a fine, odorless powder, white to slightly beige. It is known for its high water and oil absorption and its gentleness, making it ideal for cosmetic and dermatological applications.
Practical formulation guide
Usage level: Recommended usage level
How to use and incorporate: Dry-blend with the other powders or disperse in the water phase with good stirring. In powder masks, hydrate with water, hydrosol or vinegar at the time of use.
Formulation tips:
- Clays absorb water and oil: in masks, mix with water, hydrosol or apple cider vinegar at the time of use; prefer non-metal utensils.
- Clays and powders absorb water and oil: adjust the proportion of liquids in the formula.
- In water-based products, the powder adds microbial load: use a preservative.
- Before scaling up, make a pilot batch and run a stability test (cycles at 4 / 25 / 45 °C/39 / 77 / 113 °F for 4 weeks, checking odor, color, pH, viscosity and separation) in the final packaging.
Compatibility: Incompatibilities
Strong acids (e.g. hydrochloric acid, sulfuric acid) → can alter kaolin's crystal structure and release aluminum salts and silica. Strong bases (e.g. sodium or potassium hydroxide) → can break down the aluminum silicate, forming soluble aluminates. Ammonium salts → can react with kaolin's hydroxyl groups, affecting stability in some formulations. Strong chelating agents (e.g. excess EDTA) → can complex the aluminum and reduce its absorbent properties.
Storage: Shelf life: 24 months under proper conditions. Store in a dry, cool place, away from moisture and contaminants.
Precautions: Avoid inhaling the powder (may cause respiratory irritation). Wear personal protective equipment (mask and goggles) when handling the powder. Store in a cool, dry, ventilated place. Keep containers tightly closed to prevent moisture. Handling Use personal protective equipment (PPE): lab coat, gloves, face mask, safety glasses.
Technical information for formulators: This sheet describes industrial uses of the raw material in the development of cosmetic products. It is not an efficacy claim for any finished product. The person responsible for the formulation must validate the concentration, compatibility and claims of their product in accordance with applicable regulations.
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