Triisopropanolamine

What is Triisopropanolamine?

Triisopropanolamine is a synthetic tertiary amine alcohol, chemically known as 2,2'-(methylimino)bis(1-propanol), produced through the reaction of ammonia and propylene oxide. This viscous, colorless to yellow liquid serves primarily in rinse-off and leave-on personal care products such as shampoos, body washes, and creams. It functions by neutralizing acids or bases to achieve desired pH levels, stabilizing emulsions and enhancing preservative activity. As a buffering agent, it resists pH changes from environmental factors or ingredient interactions. Additionally, it coats metal surfaces in packaging like pumps or tubes, inhibiting oxidative corrosion that could lead to discoloration or odor issues. Present at low levels, it enables formulators to create consistent, reliable products across various categories including hair and skin care, without significantly impacting texture or scent.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3-6 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Corrosion inhibitor
Reduces corrosion reactions on metal surfaces in packaging or applicators, helping prevent rust, off-odors, and metal-related discoloration over time.
PH adjuster
Raises or lowers pH to the target range, supporting ingredient performance, preservative efficacy, stability, and user comfort.
Buffering agent
Maintains the pH stability of a formulation.

Benefits

Maintains stable pH for consistent product performance and ingredient efficacy.

Prevents metal corrosion in packaging, preserving freshness and appearance.

Supports buffering to ensure formulation reliability over time.

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 pH-sensitive cleansers and conditioners for reliable results.
Those with highly reactive or allergy-prone skin to amines.
Individuals with products in metal applicators to avoid contamination.
Individuals sensitive to moderate-rated cosmetic ingredients.
People seeking durable, stable everyday skincare formulations.
Users preferring fully natural or amine-free product compositions.

Safety Notes

  • EWG rates it 3-6, reflecting moderate concerns from potential irritation or contamination risks.
  • Non-comedogenic with rating of 0, suitable for acne-prone skin.

Frequently Asked Questions about Triisopropanolamine

What does triisopropanolamine do in skincare?

It adjusts and buffers pH while inhibiting corrosion in packaging for stable products.

Is triisopropanolamine comedogenic?

No, it has a comedogenic rating of 0 and does not clog pores.

What safety rating does it have?

EWG scores range from 3 to 6, indicating moderate hazard potential.