Aluminum isopropoxide is a synthetic stabilizer rarely used in leave-on skincare; it may pose irritation risks and is best avoided in sensitive skin products.
Irritation
moderate
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
Aluminum isopropoxide is a synthetic stabilizer rarely used in leave-on skincare; it may pose irritation risks and is best avoided in sensitive skin products.
Irritation
moderate
Source
synthetic
Aluminum Lanolate is a waxy stabilizer that helps keep water and oil mixed, but it may not suit acne-prone skin due to its moderate comedogenic potential.
Irritation
low
Source
semi-synthetic
Aluminum Triphosphate is a safe, low-irritation stabilizer that helps maintain product pH and texture, but it offers no direct skin benefit.
Irritation
low
Source
synthetic
A behind-the-scenes stabilizer that protects your products from metal contamination, but not a direct skin benefit ingredient.
Irritation
low
Source
synthetic
A gentle synthetic chelator that helps your skincare products stay effective longer by preventing metal ions from breaking down ingredients.
Irritation
low
Source
synthetic
A synthetic stabilizer that helps maintain product consistency, but with limited research on long-term skin effects.
Irritation
low
Source
synthetic
UV Stabilizer
BIS-(TETRAMETHYL HYDROXYPIPERIDINYL) SEBACATE
A synthetic UV stabilizer that protects product formulas from light damage, but offers no direct skin benefit.
Irritation
low
Source
synthetic
A synthetic UV stabilizer that helps protect both your skin and the product formula from UV damage, but it's not a primary sunscreen active.
Irritation
low
Source
synthetic
Bismaleate is a synthetic stabilizer that helps keep skincare products consistent and pleasant to use, but it has limited direct skin benefits.
Irritation
low
Source
synthetic
A gentle, synthetic thickener that helps create smooth gel textures and keeps formulas stable without irritating skin.
Irritation
low
Source
synthetic
Calcium Trifluoroacetate is a synthetic salt used in tiny amounts for pH control, but it is rare in mainstream skincare and lacks robust safety data for cosmetic use.
Irritation
moderate
Source
synthetic
Cetearyl Stearate is a gentle, waxy ingredient that helps creams feel rich and smooth without clogging pores.
Irritation
low
Source
semi-synthetic
Cucurbiturils are advanced synthetic molecules that help stabilize and deliver active ingredients, but their use in cosmetics is still emerging and not widely studied in everyday products.
Irritation
low
Source
synthetic
Cyclodextrin is a gentle, sugar-based molecule that helps stabilize and deliver active ingredients deeper into the skin without irritation.
Irritation
low
Source
natural
A gentle, starch-derived powder that helps stabilize and slowly release active ingredients, making formulas more effective and less irritating.
Irritation
low
Source
semi-synthetic
Encapsulating Agent
Cyclodextrin Hydroxypropyltrimonium Chloride
A gentle, modified starch that wraps up active ingredients to make them more stable and less irritating on skin.
Irritation
low
Source
semi-synthetic
A behind-the-scenes stabilizer that helps keep your products fresh and effective by neutralizing trace metals.
Irritation
low
Source
synthetic
Chelating Agent
DIETHYLENETRIAMINE PENTAMETHYLENE PHOSPHONIC ACID
A behind-the-scenes stabilizer that protects your products from metal contamination, but not a direct skin benefit ingredient.
Irritation
low
Source
synthetic
Diethyllutidinate is a synthetic stabilizer that may help other ingredients work better, but research on its direct skin benefits is still limited.
Irritation
low
Source
synthetic
A synthetic stabilizer that helps keep formulas consistent but may cause irritation in sensitive skin at higher levels.
Irritation
moderate
Source
synthetic
A gentle chelator that helps your skincare products stay effective longer by neutralizing trace metals in the formula.
Irritation
low
Source
synthetic
Disodium EDTA is a safe, widely used stabilizer that protects your skincare products from metal contamination, helping them stay effective longer.
Irritation
low
Source
synthetic
Chelating Agent
Disodium Hydroxyethylamino Bismethylphosphonate
A gentle chelating agent that helps your skincare products stay effective by protecting them from metal impurities.
Irritation
low
Source
synthetic
A gentle chelating agent that helps your products stay effective longer by neutralizing hard-water minerals.
Irritation
low
Source
synthetic
Dithiothreitol is a lab-made reducing agent occasionally used in skincare to break disulfide bonds, but it's not a common or well-studied ingredient for cosmetic benefits and may cause irritation at higher concentrations.
Irritation
moderate
Source
synthetic
A synthetic antioxidant that helps keep oils and butters fresh, but it's not a star active for skin benefits.
Irritation
low
Source
synthetic
EDTA is a workhorse stabilizer that protects your skincare formulas from metal contamination, helping them stay effective longer.
Irritation
low
Source
synthetic
Ethyl-3-Alpha is a synthetic ingredient with limited public data; it appears safe at low levels but lacks robust research.
Irritation
low
Source
synthetic
A synthetic wax that helps thicken and stabilize products, but offers no direct skin benefit.
Irritation
low
Source
synthetic
A gentle, plant-derived ester that improves product texture and wear, especially in lip and color cosmetics.
Irritation
low
Source
semi-synthetic
Magnesium phosphate is a safe, low-irritation mineral salt that helps keep your skincare products stable and at the right pH, but it doesn't directly improve your skin.
Irritation
low
Source
synthetic
A workhorse chelating agent that helps your products stay fresh and effective by neutralizing troublesome metal ions.
Irritation
low
Source
synthetic
Chelating Agent
PENTASODIUM ETHYLENEDIAMINE TETRAMETHYLENE PHOSPHONATE
A synthetic chelator that helps keep your products stable and effective by binding to unwanted metals in the formula.
Irritation
low
Source
synthetic
Stabilizer
ETHANEPEROXOIC ACID/ALUMINUM ISOPROXIDE/TRIMETHYL-CYCLODODECATRIENE
This is a synthetic processing aid with limited direct skin benefit; it's rarely used in leave-on skincare and may pose irritation risks at higher concentrations.
Irritation
moderate
Source
synthetic
A synthetic stabilizer that protects your skincare products from breaking down in light, but it's not a primary sunscreen agent.
Irritation
low
Source
synthetic
Buffering Agent
Water, Sodium Chloride, Disodium Phosphate, Potassium Phosphate, Potassium Chloride
A gentle pH buffer and saline base that helps keep other ingredients stable and comfortable on skin.
Irritation
low
Source
synthetic
A gentle pH adjuster and stabilizer that helps keep your skincare formulas balanced and effective without causing irritation.
Irritation
low
Source
synthetic
Viscosity Controlling
POTASSIUM OXIDIZED MICROCRYSTALLINE CERA
A modified wax that helps thicken and stabilize products, generally considered safe and non-irritating for most skin types.
Irritation
low
Source
semi-synthetic
A synthetic mineral salt that helps keep your skincare products stable and at the right pH, with a low risk of irritation.
Irritation
low
Source
synthetic
Sodium borohydride is a synthetic chemical used in tiny amounts as a processing aid in cosmetics, not a direct skincare ingredient, and its safety depends on proper formulation.
Irritation
moderate
Source
synthetic
Sodium hydrosulfite is a strong reducing agent used mainly in industrial or hair color removal products, not a common or recommended ingredient for everyday skincare.
Irritation
moderate
Source
synthetic
Stabilizer
SODIUM HYDROXYPROPYL CYCLODEXTRIN OCTENYLSUCCINATE
A gentle, modified cyclodextrin that helps stabilize delicate ingredients and improve their delivery into skin without irritation.
Irritation
low
Source
semi-synthetic
A synthetic stabilizer that prevents oxidation but may release trace formaldehyde under certain conditions, making it a cautious choice for sensitive skin.
Irritation
moderate
Source
synthetic
Chelating Agent
SODIUM DIETHYLENETRIAMINE PENTAMETHYLENE PHOSPHONATE
A behind-the-scenes stabilizer that protects your products from metal contamination, but offers no direct skin benefit.
Irritation
low
Source
synthetic
Chelating Agent
SODIUM PIPERAZINOETHYL ACETATE ETHYLSULFONATE
A gentle synthetic chelator that protects your skincare formula from metal contamination without the harshness of EDTA.
Irritation
low
Source
synthetic
Sodium stannate is a synthetic stabilizer used mainly in hair dyes; it's effective but has moderate irritation potential and limited research on long-term safety.
Irritation
moderate
Source
synthetic
A gentle chelating agent that helps maintain product stability and effectiveness by binding metal ions.
Irritation
low
Source
synthetic
Sodium Tungstate Antimonate is a synthetic stabilizer with limited cosmetic research and potential safety concerns; it's best avoided in leave-on products until more data is available.
Irritation
moderate
Source
synthetic
Stannous chloride is a synthetic stabilizer used in some hair dyes and formulas to prevent oxidation, but it has moderate irritation potential and is not common in everyday skincare.
Irritation
moderate
Source
synthetic
Stannous pyrophosphate is a synthetic stabilizer that helps preserve product integrity, but its role is more about formulation stability than direct skin benefits.
Irritation
low
Source
synthetic
A gentle chelating agent that helps your skincare products stay effective and stable by neutralizing hard water minerals.
Irritation
low
Source
synthetic
A behind-the-scenes helper that protects your skincare formulas from metal contamination, keeping them effective and stable.
Irritation
low
Source
synthetic
A synthetic chelator that helps preserve formula integrity by neutralizing trace metals, but it is rarely highlighted as a standalone active.
Irritation
low
Source
synthetic
Trimethylamine Oxide is a gentle buffering agent that helps maintain product stability, but its role in skincare is minor and not a primary active ingredient.
Irritation
low
Source
natural
Trimethylolpropane is a synthetic alcohol used as a building block for other ingredients; it is not a direct active and is generally safe at low concentrations.
Irritation
low
Source
synthetic
A synthetic stabilizer that helps keep formulas consistent, but is rarely the star ingredient.
Irritation
low
Source
synthetic
A safe and effective stabilizer that helps your products stay fresh and work better by neutralizing unwanted metals.
Irritation
low
Source
synthetic
A gentle, biodegradable alternative to traditional chelating agents that protects your skincare formulas from metal-induced degradation.
Irritation
low
Source
synthetic
A gentle chelating agent that protects your skincare formulas from metal contamination, helping them stay effective longer.
Irritation
low
Source
synthetic