Specialty Additives Available — Bulk Only

Polycaprylylsilsesquioxane and Alumina

CAS 1344-28-1

A two-component cosmetic powder pairing a silicone resin with aluminum oxide for opacity and texture control. The alumina component functions as an opacifying, texturizing, and viscosity-controlling powder in cosmetic and personal-care formulations.

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CAS Number
1344-28-1
Material Family
Specialty Additives
At a Glance
Material Family
Specialty Additives
Record Type
Pure compound
Primary Role
Thickening / Rheology · Color / Pigmentation
Functional Roles
ALUMINA
ABRASIVEABSORBENTANTICAKINGBULKINGOPACIFYINGVISCOSITY CONTROLLING
Applications & Use Cases
  • Opacifier: Aluminum oxide provides opacity in cosmetic bases.
  • Texture control: Powder phase modifies feel and spreadability.
  • Viscosity control: Adjusts rheology of the formulation.
  • Color cosmetics: Powder component for formulated decorative products.
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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Chemical Identity
CAS Number
1344-28-1
INCI Name
ALUMINA
Synonyms & Trade Names
ALUMINUM OXIDE Aluminium oxide Aloxite gamma-Alumina Aluminum trioxide Dialuminum trioxide Abramant Abramax Abrasit Almite Alundum Saffie delta alumina Aluminum lake Theta alumina Eta-alumina Neobead C Fiber FP Aluminite 37
Full Description

This material is a powder blend of polycaprylylsilsesquioxane (a crosslinked silicone resin) and alumina (aluminum oxide, CAS 1344-28-1). The alumina component functions as an opacifying, texturizing, and viscosity-controlling powder in cosmetic and personal-care formulations.

Frequently Asked Questions

What is polycaprylylsilsesquioxane and alumina used for?

It is a powder blend used in cosmetic and personal-care formulations as an opacifier, texturizer, and viscosity/rheology modifier. The alumina component provides opacity while the crosslinked silicone resin modifies feel and spreadability.

What does the alumina component do in this blend?

Aluminum oxide (alumina, CAS 1344-28-1) functions as an opacifying and texturizing powder and helps control viscosity in formulated bases. It is commonly used in color cosmetics and decorative product systems.

What is the function of the silsesquioxane resin in the blend?

Polycaprylylsilsesquioxane is a crosslinked silicone resin that contributes to film, texture, and spreadability of the powder phase. It pairs with the alumina to deliver combined opacity and feel benefits in formulations.

What is the CAS number for the alumina in this product?

The alumina (aluminum oxide) component carries CAS 1344-28-1 and formula Al2O3. Reference this CAS together with the full blend name on any CoA or SDS request to confirm composition.

How is this powder blend supplied in bulk and what handling documentation is available?

It is supplied as a dry powder blend in standard industrial packaging for formulators. Request the SDS and CoA for GHS classification, particle/handling data, and lot specifications before ordering; pricing is available by bulk quote.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.