Adipic Acid
What is Adipic Acid?
Adipic acid, chemically known as hexanedioic acid, is a simple straight-chain dicarboxylic acid containing six carbon atoms (C6H10O4). It appears as a white, crystalline powder and can be derived synthetically from the oxidation of cyclohexane or through bio-based fermentation of glucose. In the cosmetics industry, it falls under functional additives rather than bioactive compounds, commonly appearing in rinse-off products like shampoos, body washes, and conditioners, as well as some lotions. Its primary role involves acting as a weak acid that donates protons to fine-tune the pH of formulations downward when needed, optimizing conditions for ingredient stability and microbial control. As a buffering agent, it resists pH changes from external factors or ingredient interactions, preserving product integrity over time. It also improves the solubility of fragrance compounds and neutralizes off-odors from raw materials, contributing to a pleasant user experience without dominating the scent profile. Used at trace to low levels, it supports overall formula performance.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Maintains stable pH to enhance formula longevity and ingredient effectiveness.
Reduces perception of unwanted odors for improved product sensory appeal.
Supports non-comedogenic properties suitable for clearer skin feel.
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 seeking stable, pH-balanced skincare products. | People with rare allergies to dicarboxylic acids. |
| Users preferring gentle, low-hazard functional ingredients. | Individuals opting for strictly fragrance-free formulations. |
| Those desiring odor-masking benefits in cleansers and lotions. | Users with highly reactive skin preferring minimal acidulants. |
Safety Notes
- Considered low hazard with minimal skin concerns from regulatory reviews.
- Non-comedogenic and typically used in safe, low concentrations.
Frequently Asked Questions about Adipic Acid
What is adipic acid used for in skincare?
It adjusts pH, buffers stability, masks odors, and aids fragrance in products like cleansers and lotions.
Is adipic acid safe for daily use?
Yes, it has a low safety rating and is non-comedogenic, suitable for most skin types at typical levels.
Does adipic acid clog pores?
No, it carries a comedogenic rating of 0, making it unlikely to contribute to pore blockage.