The library

Ingredient library

Every ingredient SkinAtlas knows about — all 2402 of them. What each one does, what it works well with, and what to watch for.

All 2402 ingredients — page 96 of 101

UV filter
Trimethoxybenzylidene Pentanedione
3-(3,4,5-Trimethoxybenzylidene)-2,4-pentanedione

A multi-functional sunscreen ingredient (commercial name Synoxyl HSS) that acts as a photostabilizer and SPF booster while providing antioxidant benefits.

photostabilizerspf-boosterantioxidantchelator
Stabilizes sunscreen filters against UV degradationBoosts SPF performanceAntioxidant protection
Relatively new ingredient with limited long-term safety data
Emollient
Trimethylolpropane Triisostearate
TRIMETHYLOLPROPANE TRIISOSTEARATE

A triester of trimethylolpropane and isostearic acid used as an emollient and skin-conditioning agent that provides a rich, smooth skin feel without heaviness.

emollientskin-conditioning
Rich, non-greasy emollient with excellent spreadabilityImproves moisturizer texture
+ Glycerin+ Mineral Oil
Other
Trimethylsiloxysilicate

A cross-linked silicone resin film-former that creates a durable, water-resistant, flexible film on skin, widely used in long-wear makeup and sunscreens.

film-formerwater-resistance-agent
Forms a flexible, water-resistant filmHolds pigments in place for long wearBreathable — does not block pores
Emollient
Trioctyldodecyl Citrate

A citric acid ester of octyldodecanol used as a lightweight emollient with a silky, non-greasy finish.

emollient
Light, silky emollient feelImproves spreadability in serums and eye creams
Active
Tripeptide-1

A short synthetic tripeptide that mimics a collagen fragment, used in anti-aging formulations to support collagen production and skin resilience.

skin-conditioningcollagen-stimulating
Stimulates collagen synthesisSupports skin firmness and elasticityMay help reduce fine lines with continued use
Active
Tripeptide-10 Citrulline

A synthetic tripeptide incorporating citrulline; targets the extracellular matrix to improve skin firmness and elasticity by supporting fibulin-7-mediated collagen organization.

anti-agingpeptideskin-firming
Citrulline-containing tripeptide that helps maintain skin firmness by supporting collagen network integrityWorks by binding to fibulin-7, which helps organize the extracellular matrix
+ Copper Tripeptide-1+ Acetyl Hexapeptide-8
Active
Tripeptide-2

A synthetic tripeptide included in multi-peptide anti-aging complexes. Tripeptide-2 has been researched for anti-senescence activity — inhibiting proteins associated with cellular aging — complementing the matrix-building and neuromodulating effects of other peptides in pore-refining ampoule formulas.

anti-agingskin-firminganti-senescence
May reduce skin senescence markers and support cellular renewalWorks synergistically with other peptides to improve skin tone and firmnessWell-tolerated in sensitive-skin formulas
+ Tripeptide-1+ Copper Tripeptide-1+ Palmitoyl Pentapeptide-4
Active
Tripeptide-3

A short synthetic tripeptide used in prestige anti-aging ampoules. Tripeptide-3 exerts its effects via neuromodulating pathways, complementing other anti-wrinkle peptides such as Acetyl Hexapeptide-8 and Palmitoyl Pentapeptide-4 in multi-peptide complexes targeting expression lines and skin firmness.

anti-agingskin-firmingmuscle-relaxing
Neurotransmitter-inhibiting mechanism may reduce the appearance of expression linesSynergistic with other peptides in multi-peptide anti-aging complexesLightweight, well-tolerated synthetic peptide
+ Acetyl Hexapeptide-8+ Palmitoyl Pentapeptide-4+ Copper Tripeptide-1
Active
Tripeptide-32

A synthetic tripeptide (Pro-Ser-Thr) marketed as Chronolux, used in anti-aging formulations for its skin-conditioning properties and claimed circadian rhythm-modulating activity.

skin-conditioninganti-aging
Skin-conditioning and hydratingClaimed to modulate skin's circadian rhythm for cellular repairMay enhance resistance to environmental stressors
Claims about circadian activation are largely manufacturer-based; limited independent peer-reviewed evidence
Other
Tris(Tetramethylhydroxypiperidinol) Citrate

Tris(Tetramethylhydroxypiperidinol) Citrate is a citrate salt of a hindered amine light stabilizer (HALS) based on the tetramethylhydroxypiperidinol moiety. In retinol-containing cosmetics it functions as a radical chain-breaking stabilizer that protects retinol from photochemical and oxidative degradation, significantly extending product stability and efficacy. This is a formulation stability additive — it does not have direct skin benefit but preserves the activity of retinol.

antioxidantstabilizing
A hindered amine light stabilizer (HALS) based on the tetramethylhydroxypiperidinol (TEMPO-related) scaffold — used specifically to protect retinol from UV-induced and oxidative photodegradation in cosmetic formulationsHALS compounds interrupt radical chain reactions by scavenging peroxy and alkoxy radicals that initiate retinol degradation — without the HALS, retinol products lose potency rapidly under light exposureAs a citrate salt, it is compatible with aqueous formulation matrices; provides significantly improved retinol shelf-life stability compared to tocopherol-only antioxidant systems
+ Retinol+ Retinal+ Tocopherol
UV filter
Tris-Biphenyl Triazine
TRIS-BIPHENYL TRIAZINE

An insoluble organic UV filter with broad-spectrum UVA+UVB protection. Photostable — does not degrade on UV exposure. Used in Japanese and European sunscreens. Related to Tinosorb S. Not yet FDA-approved for US market.

UV-filter
Broad-spectrum UVA+UVB filterPhotostableApproved in EU; not approved by FDA (US)
+ Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine+ Titanium Dioxide
Emollient
Trisiloxane

A low-molecular-weight, linear volatile silicone (three siloxane units) used as a lightweight emollient and carrier to improve formula spreadability and the feel of moisturizers and sunscreens.

emollientsolventcarrier
Provides an ultra-lightweight, fast-evaporating silky feelEnhances spreadability and penetration of activesExcellent formula-spreading properties
Active
Trisodium Ascorbyl Palmitate Phosphate

A stable amphiphilic vitamin C derivative (combination of ascorbic acid, palmitic acid, and phosphoric acid) that delivers antioxidant and brightening benefits while resisting oxidative degradation.

antioxidantskin-conditioningbrightening
Stable, water-soluble vitamin C derivative resistant to oxidationAntioxidant protection and brightening at low concentrations (0.5–2%)May reduce appearance of fine lines at higher concentrations (2–5%)
Generally considered safe; potential mild irritation at high concentrations in sensitive skin
Other
Trisodium EDTA
TRISODIUM EDTA

A trisodium salt of EDTA used as a chelating agent (metal ion sequestrant) that improves formula stability, prevents degradation, and enhances preservative systems. Distinct from Disodium EDTA (one fewer sodium).

chelatingpreservative-enhancer
Chelates calcium and magnesium ions to stabilise formulasBoosts preservative efficacyPrevents rancidity
+ Disodium EDTA+ Phenoxyethanol
Other
Trisodium Ethylenediamine Disuccinate

A biodegradable chelating agent used as a greener alternative to disodium EDTA to bind trace metals and improve preservative performance in cosmetics.

chelator
Chelates heavy metal ions to improve formula stability and preservation efficacyBiodegradable and eco-friendlier alternative to EDTA
Active
Triticum Aestivum Seed Extract

An extract from the seeds of Triticum aestivum (common wheat) containing phytosterols, lipids, and antioxidant compounds that condition and support the skin barrier.

skin-conditioningantioxidantmoisturizing
Rich in phytosterols, ceramide-like lipids, and antioxidants that support the skin barrierMoisturizing and skin-softeningAnti-aging properties from wheat peptides and phytosterols
May cause reactions in those with wheat allergy — patch test recommended
Soothing
Triticum Vulgare (Wheat Bran) Extract
TRITICUM VULGARE BRAN EXTRACT

An extract from wheat bran rich in B-vitamins, tocopherols, and ferulic acid. Used as a soothing and conditioning agent with mild antioxidant properties.

soothingskin-conditioning
Rich in vitamins B and E and ferulic acidCalms mild irritation and rednessProvides mild antioxidant support
Contains wheat proteins — those with severe wheat/gluten allergy should patch-test (topical risk is much lower than dietary)
+ Panthenol+ Allantoin
Antioxidant
Triticum Vulgare (Wheat) Germ Extract
Triticum Vulgare Germ Extract

An extract from the germ (embryo) of Triticum vulgare (common wheat), concentrated in tocopherols, phytosterols, and fatty acids; provides antioxidant and conditioning benefits. Distinct from Triticum Vulgare Seed Extract (whole seed) and Triticum Vulgare Germ Oil.

antioxidantemollientskin-conditioning
Rich in tocopherols (vitamin E) for antioxidant protectionProvides phytosterols and fatty acids for mild emollient conditioningSupports the skin barrier with natural lipid components
Contains wheat proteins — may be a concern for individuals with severe wheat/gluten sensitivities, though topical risk is low
+ Vitamin C+ Niacinamide
Active
Triticum Vulgare Sprout Extract

Extract from sprouted Triticum vulgare (wheat) grains. Germination increases concentrations of antioxidants and phytochemicals, particularly ferulic acid and superoxide dismutase precursors.

antioxidantskin-conditioningbrightening
Sprouted wheat extract rich in growth factors, superoxide dismutase, and ferulic acidAntioxidant protection and skin-conditioning; higher bioactive content than non-sprouted wheat extracts
Individuals with severe wheat allergies should exercise caution, though topical exposure differs from ingestion
Other
Tromethamine

An organic amine used as a pH adjuster and buffering agent in cosmetic formulations.

ph-adjuster
Adjusts and stabilizes formula pH
Preservative
Tropolone

An organic antimicrobial compound used as a preservative or preservative booster in cosmetics, typically combined with phenoxyethanol for broad-spectrum protection.

preservativeantimicrobialantioxidant
Antimicrobial against bacteria and fungiAntioxidant properties extend formula shelf lifeUsed to reduce reliance on parabens
Possible mild irritation in sensitive skin; usually used in combination with broader-spectrum preservatives
Other
Tryptophan

An essential amino acid (L-tryptophan) included in cosmetic amino acid complexes that mimic the skin's natural moisturizing factor, providing conditioning and supporting protein synthesis.

Skin conditioningAmino acidAntioxidant
Amino acid precursor supporting skin protein synthesisMild antioxidant propertiesConditions skin
Antioxidant
Tuber Magnatum Extract

An extract from the Italian white truffle (Tuber magnatum), rich in antioxidants, essential fatty acids, and vitamins, used in premium skincare for anti-aging, hydration, and radiance.

antioxidanthumectantanti-aging
Antioxidant protection via polyphenols and vitaminsSupports hydration and skin nourishmentClinical evidence for improved elasticity and reduced fine lines
Humectant
Tuberose Polysaccharide
POLIANTHES TUBEROSA POLYSACCHARIDE

A polysaccharide derived from tuberose (Polianthes tuberosa). Functions as a humectant and film-former, providing intense moisturization and a silky skin feel. Used in premium Kanebo formulations.

humectantfilm-formerskin-conditioning
High moisture retentionFilm-forming — creates protective hydrating filmLuxurious skin feel
+ Hyaluronic Acid+ Sodium Hyaluronate