Availability and Alternatives for PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin

Yes, we have the ingredient you are looking for. The ingredient with the INCI name PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin is available under the trade name Double Glycerin.

1. Double Glycerin (PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin)

This is the exact ingredient you are looking for (often known by the trade name Wilbride S-753). It is a structurally modified glycerin designed to be soluble in both water and all types of oils.

• Key Properties:
  • Dual Solubility: Can dissolve in both water and oil, making it excellent for oil-based formulations that require a humectant or for stabilizing complex mixtures.
  • Humectancy: Provides long-lasting moisture similar to glycerin but without the stickiness.
  • Usage Rate: 1-50% (typically used at 1-5% in most formulations).
  • Mixing: Can be mixed in either the water or oil phase. Avoid heating above 60°C.
• Commonly used in: High-end products like Vichy Mineral 89, La Roche-Posay Pigmentclar, and Kiehl’s Clearly Corrective Dark Spot Solution.

2. Polyethylene Glycol 400 (PEG-8)

You also mentioned PEG-8, which is a different ingredient. While it shares some structural similarities (being a polyether), its function is different:

• Function: Primarily used as a safe solvent, carrier, and humectant.
• Solubility: Soluble in water, ethanol, and glycols, but not typically in pure oils like Double Glycerin.
• Usage: Used as a base for various cosmetic products or to help dissolve other active ingredients.

Recommendation:
For your formula requiring the "8/5/3" ingredient, you should use Double Glycerin.