PPG-38-Buteth-37

What is PPG-38-Buteth-37?

PPG-38-Buteth-37 is a synthetic polyether compound produced by reacting butanol with propylene oxide (37 units) and ethylene oxide (38 units), yielding an amphiphilic molecule with a hydrophobic alkyl chain and hydrophilic polyoxyethylene segments. Primarily used in rinse-off and leave-on cosmetics like shampoos, conditioners, toners, and sprays, it excels as a solubilizer. By orienting at interfaces, it lowers surface tension, dispersing water-insoluble fragrance oils and essential oils into clear, homogeneous aqueous solutions without turbidity. Its surfactant properties also facilitate emulsification and foam formation, while the polymeric structure allows for light film-forming on skin and hair, contributing to a smoother texture post-application. Regulatory bodies affirm its suitability for cosmetic formulations at typical levels.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Cleansing agent
Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.
Solubilizing agent
Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.

Benefits

Facilitates incorporation of scents into clear water formulas

Supports gentle removal of dirt and excess oils

Promotes softer feel on skin and hair surfaces

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of fragrance-forward shampoos and body washes
Those sensitive to polyether surfactants
Individuals seeking non-comedogenic cleansing options
Users preferring entirely natural ingredient profiles
People with normal to oily hair needing conditioning aids
Individuals with fragrance allergies regardless of solubilizer

Safety Notes

  • Low overall hazard profile in cosmetic concentrations
  • Minimal irritation potential in standard formulations

Frequently Asked Questions about PPG-38-Buteth-37

What does PPG-38-Buteth-37 do in products?

It disperses oils and fragrances into water for clear, stable formulas while aiding cleansing.

Is PPG-38-Buteth-37 safe for daily use?

Evaluated as low hazard and suitable for cosmetics by safety authorities.

Does it benefit hair or skin?

Helps condition both by reducing friction and improving smoothness.