PPG-7
What is PPG-7?
PPG-7, known chemically as poly(propylene glycol)-7, is a synthetic oligomer made by polymerizing seven units of propylene oxide. This low-molecular-weight polyalkylene glycol features hydrophilic properties, making it versatile for personal care formulations. It originates from petrochemical processes and is common in skincare products like lotions, creams, and cleansers, as well as hair care items. In formulations, PPG-7 acts primarily as a solvent by dissolving lipophilic and hydrophilic ingredients, which stabilizes emulsions, adjusts viscosity, and modulates evaporation to ensure even application. Its skin conditioning role involves depositing a thin, non-occlusive layer on the skin that promotes suppleness and smoothness by interacting with the stratum corneum's lipids. Due to its small size, it offers better penetration than higher polymers without heaviness, supporting lightweight textures in daily-use products.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Provides lightweight skin softening and smoothing for improved flexibility.
Facilitates even distribution of active ingredients through solvent action.
Supports non-comedogenic formulations suitable for various skin types.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals with normal to dry skin seeking hydration without heaviness. | Those with known sensitivity to polyether compounds. |
| Users preferring lightweight moisturizers and serums. | Individuals experiencing irritation from similar glycols in patch tests. |
| People with acne-prone skin due to its non-pore-clogging nature. | People preferring entirely natural or glycol-free products. |
Safety Notes
- Considered safe for cosmetic use with low overall hazard potential.
- Displays minimal comedogenic risk, rated at zero on standard scales.
Frequently Asked Questions about PPG-7
What is PPG-7 used for in skincare?
It serves as a solvent to blend ingredients and a conditioner to soften skin's texture.
Is PPG-7 safe for sensitive skin?
It generally shows low irritation potential in cosmetic applications.
Does PPG-7 cause acne?
No, it carries a zero comedogenic rating, making it suitable for acne-prone skin.