Kaolin: Pharmaceutical-Grade Clay for Adsorbent and Topical Applications
Kaolin (hydrated aluminium silicate, china clay) is a naturally occurring clay mineral used as an adsorbent, diluent, and protective agent in pharmaceutical formulations. It has a long history of use in antidiarrhoeal preparations and continues to find application in topical wound care products, dusting powders, and as a tablet and capsule diluent.
Product Profile
| CAS Number | 1332-58-7 |
|---|---|
| Appearance | White to off-white, fine, odourless powder |
| Function | Adsorbent / diluent / protective agent / suspending agent |
| Typical Use Level | 10–30% as tablet diluent; up to 20% in topical preparations |
| Compendial Grade | EP / USP-NF |
Formulation Applications
Kaolin’s adsorptive properties make it useful in poultice preparations for drawing moisture from wounds and inflamed tissue. In oral formulations, it was traditionally combined with pectin for antidiarrhoeal products, where it adsorbs toxins and bacteria in the GI tract. Kaolin is used as a tablet and capsule diluent, particularly in formulations where its mild adsorbent properties are beneficial. In topical dusting powders, it provides a smooth skin feel and absorbs moisture. Formulators should be aware that kaolin can adsorb certain drugs (e.g., alkaloids, antibiotics) and reduce their bioavailability — compatibility testing is essential when using kaolin with active ingredients.
Why Source from TCS
TCS supplies kaolin in pharmaceutical and technical grades to formulators across Europe. Available in standard packaging with flexible quantities for R&D through production scale. Contact us with your application and volume requirements.
FAQ
What information should be included in an inquiry for Kaolin –1332-58-7?
A useful inquiry normally includes the product name, target application, estimated quantity, destination market, and any specific documentation or packaging requests.
How is Kaolin –1332-58-7 usually evaluated for sourcing?
This product is positioned for excipient sourcing where formulation fit, dosage form, handling, and repeat purchasing requirements need to be reviewed together with commercial supply conditions.
What documentation and commercial points are commonly reviewed before buying Kaolin –1332-58-7?
For excipient sourcing, teams usually discuss the intended dosage form, formulation role, packaging format, order volume, and the routine documentation needed for qualification and purchasing.
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