
THE STORY OF PEG 400
PEG 400: The Reliable Solubilizer for Smooth, Stable Formulations
PEG 400 (Polyethylene Glycol 400) is a clear, low-viscosity liquid polymer widely used in cosmetic and personal-care formulations for its excellent solubilizing, moisturizing, and humectant properties. Known for its versatility and compatibility, it enhances texture, stability, and ingredient dispersion across a broad range of formulations.
Produced Through Controlled Polymerization for Consistent Purity
PEG 400 is created through the controlled polymerization of ethylene oxide, followed by purification to achieve pharmaceutical and cosmetic-grade quality. Its consistent molecular weight ensures predictable performance, low toxicity, and excellent formulation compatibility, making it a trusted ingredient globally.
Superior Solubilization, Moisture Retention & Sensory Enhancement
In cosmetics, PEG 400 serves as a solubilizer, humectant, viscosity modifier, and carrying agent.
It improves ingredient dispersion, enhances moisture retention, reduces greasiness, and boosts the smooth flow of liquid formulations. Ideal for serums, gels, lotions, cleansers, and hair-care solutions requiring light, uniform textures.
Versatile, Safe, and Highly Compatible Across Formulations
Used in skincare, haircare, oral-care, pharmaceutical topicals, and cleansing systems.
Recommended usage: typically 1–40%, depending on the solubilizing or humectant requirement.
Store tightly sealed in cool, dry conditions away from direct heat.
PEG 400 is non-irritating, non-volatile, and globally approved for cosmetic use, ensuring safe and consistent results for formulators.
Formulator’s Queries, We Answered
1. What is PEG-400?
PEG-400 (Polyethylene Glycol 400) is a low-molecular-weight polyethylene glycol widely used in personal care and cosmetic products. It functions as a humectant, solvent, and emulsifier, helping to retain moisture, dissolve active ingredients, and improve the texture of formulations.
2. What is the CAS Number and INCI Name of PEG-400?
CAS Number: 25322-68-3
INCI Name: PEG-400
3. What are the benefits of PEG-400 in personal care products?
PEG-400 offers several advantages, including:
Moisture Retention: Helps keep the skin hydrated.
Solvent Properties: Effectively dissolves active ingredients.
Non-Irritating & Gentle: Suitable for sensitive skin formulations.
Improves Product Spreadability: Enhances the application of creams and lotions.
Enhances Formulation Stability: Works as an emulsifier to keep ingredients well-blended.
4. In which personal care products is PEG-400 commonly used?
PEG-400 is widely found in:
Moisturizers and creams (for hydration and texture enhancement)
Cleansers and facial washes (to improve solubility of ingredients)
Shampoos and conditioners (as a humectant and emulsifier)
Ointments and serums (for better absorption and stability)
Mouthwashes and oral care products (as a solvent and dispersing agent)
5. Is PEG-400 safe for skin?
Yes, PEG-400 is generally recognized as safe for use in cosmetic and personal care products. It is non-toxic and non-irritating when used within recommended concentrations.
6. Can PEG-400 be used in natural or organic formulations?
PEG-400 is synthetically derived and is not considered natural or organic. However, it is widely accepted in clean beauty formulations due to its safety and effectiveness.
7. Does PEG-400 clog pores or cause acne?
No, PEG-400 is non-comedogenic, meaning it does not clog pores or contribute to acne breakouts.
8. How does PEG-400 improve the texture of skincare products?
PEG-400 acts as an emollient and humectant, giving creams and lotions a smooth, lightweight feel while enhancing their spreadability.
9. Is PEG-400 biodegradable?
PEG-400 is partially biodegradable, but its environmental impact depends on the formulation and concentration used in products.
10. How should PEG-400 be stored?
PEG-400 should be stored in a cool, dry place, away from direct sunlight and moisture, in a well-sealed container to maintain its stability and effectiveness.