At a glance
- CAS number
- 472-61-7
- INCI name
- Astaxanthin
- Function
- antioxidant, active, colorant
- Typical use level
- 0.001%–0.1%
- Solubility
- oil
- Stable pH
- 4–7
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
Ovoester 3,3'-dihydroxy-beta,beta-carotene-4,4'-dione Haematococcus pluvialis extract natural astaxanthin keto-carotenoid
Compatibility
Works well with:
Tocopherol Vitamin C (ascorbyl glucoside) Jojoba Oil Squalane Coenzyme Q10 Rosehip Oil
Use caution with:
high-concentration Ascorbic Acid strong oxidizing agents alkaline pH systems
Astaxanthin is highly sensitive to light, heat, and alkaline conditions, which can cause rapid oxidation and color degradation; it should be incorporated at or below 40°C into the formula. Pairing with other fat-soluble antioxidants such as tocopherol can enhance its stability through synergistic antioxidant activity. Avoid combining with high concentrations of free ascorbic acid or strong oxidizers, as these can degrade the carotenoid structure and diminish efficacy.
Formulation notes
Astaxanthin is a potent xanthophyll carotenoid derived primarily from the microalgae Haematococcus pluvialis, widely regarded as one of the most powerful natural antioxidants, with singlet-oxygen quenching capacity estimated to be many times greater than beta-carotene or tocopherol. It is used in skincare to combat oxidative stress, support photoprotection, and address visible signs of aging such as fine lines and uneven skin tone. Due to its intense red-pink color and oil solubility, it is typically supplied as a diluted oleoresin or oil dispersion and used at very low concentrations to avoid significant product discoloration.
Related ingredients
- Ascorbic AcidAntioxidant
- Ferulic AcidAntioxidant
- Tocopheryl AcetateAntioxidant
- Azelaic AcidActive
- BakuchiolActive
- BisabololActive