Isopropyl C12-15 Pareth-9 Carboxylate

What is Isopropyl C12-15 Pareth-9 Carboxylate?

Isopropyl C12-15 Pareth-9 Carboxylate is a synthetic surfactant derived from C12-15 fatty alcohols ethoxylated with nine ethylene oxide units, then carboxylated and esterified with isopropanol. This creates a mild anionic surfactant with amphoteric-like properties, enhancing gentleness. Commonly found in rinse-off products such as facial cleansers, shampoos, and shower gels within the cleansing category. It functions by lowering surface tension to enable foaming, emulsifying oils and impurities for removal, while depositing a light conditioning layer that smooths skin and minimizes tightness after washing. Its carboxylate structure reduces irritation potential compared to harsher sulfates, making it suitable for everyday formulations seeking balance between efficacy and mildness.

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

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Softens and smooths skin by mimicking natural lipids to fill surface imperfections.

Supports skin flexibility and comfort by aiding moisture retention during cleansing.

Delivers gentle surface cleansing that preserves the skin's lipid barrier.

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 dry skin needing post-cleanse softness.
Persons with allergies to ethoxylated alcohols or carboxylates.
People preferring mild surfactants in daily washes.
Individuals avoiding synthetic ingredients entirely.
Those seeking non-comedogenic options for clearer pores.
People experiencing irritation from similar mild surfactants.

Safety Notes

  • Considered low hazard overall by safety assessments.
  • Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Isopropyl C12-15 Pareth-9 Carboxylate

Is it irritating to skin?

Typically low irritation potential as a mild carboxylated surfactant.

Safe for sensitive skin?

Low hazard rating suggests suitability, but patch test recommended.

Does it clog pores?

Rated 0 for comedogenicity, suitable for acne-prone skin.