PEG-21 Stearyl Ether
Pharcos S 21
Also known as: Polyoxyethylene 21 Stearyl Ether | Brij 721 Equivalent
Pharcos S 21 acts as a powerful O/W emulsifier. It is uniquely suited for formulations with high concentrations of electrolytes, such as Aluminum Chlorohydrate in antiperspirants. When used with Steareth-2, it creates viscosity and stability in roll-ons and lotions.
Quick Information
- Product Line:
- Personal Care
- Category:
- Emulsifiers
- Grade:
- Solid / Waxy
- CAS Number:
- 9005-00-9
Key Applications
- O/W Emulsifier
- Deodorants
- High Salt Tolerance
- Antiperspirants
How It Works
High-HLB Electrolyte Defiance.
Steareth-21 has a massive, water-loving PEG chain that forces the molecule securely into the water phase, while its ether linkage ensures it does not interact with harsh metal salts. In antiperspirant roll-ons containing 20-25% Aluminum Chlorohydrate (a massive electrolyte load that instantly cracks standard emulsions), Steareth-21 remains perfectly stable, utilizing steric hindrance to keep the emulsion intact without relying on charge repulsion.
Technical Information
Common questions about PEG-21 Stearyl Ether
The pure Stearyl chain (C18) of Steareth-21, combined with its specific EO length, creates a highly structured crystalline gel phase when paired with Steareth-2. This perfectly suspends heavy antiperspirant actives without settling over time.
Related Products
Interested in this product?
Contact our technical team for detailed specifications, samples, or pricing information.