Below is every ingredient in Cosrx Ultra Light Invisible Sunscreen Spf50 Pa 50 Ml explained, its standout actives, and the side effects reported in research for those actives — analysed for Indian skin.
Flags derived from the ingredient list using dermatology reference data (fungal-acne substrate, comedogenicity, EU allergens). General guidance, not a diagnosis.
Answers are derived from the printed ingredient list and dermatology reference data — general guidance, not a diagnosis or a therapeutic claim.
Drometrizole Trisiloxane (Mexoryl XL) is a broad-spectrum, photostable organic UV filter that absorbs both UVA and UVB radiation, used in sunscreens to provide photoprotection. Its silicone-based structure gives it oil solubility and substantivity on skin.
Ethylhexyl Triazone is an oil-soluble organic UV filter that strongly absorbs UVB radiation (peak around 314 nm), valued for its high photostability and efficiency at low concentrations. It is commonly used in sunscreens and daily-wear products to boost SPF.
Niacinamide (vitamin B3) is a water-soluble active that supports the skin barrier, regulates sebum, brightens hyperpigmentation, and reduces inflammation. It is widely tolerated across skin types and used in concentrations commonly ranging from 2% to 10%.
Diethylamino Hydroxybenzoyl Hexyl Benzoate (also known as Uvinul A Plus) is an oil-soluble organic UV filter that absorbs primarily in the long-wave UVA range (around 354 nm), helping protect skin from UVA-induced damage. It is photostable and commonly combined with other filters in broad-spectrum sunscreens.
Terephthalylidene Dicamphor Sulfonic Acid (also known as ecamsule or Mexoryl SX) is a water-soluble organic UVA filter used in sunscreens to provide broad protection against UVA rays. It is photostable and often combined with other filters to enhance coverage.
Adenosine is a nucleoside that signals through cell-surface receptors to promote dermal fibroblast activity and collagen/elastin production, helping reduce the appearance of fine lines and wrinkles. It also has anti-inflammatory and soothing properties at low concentrations commonly used in cosmetics (around 0.04-0.1%).
Aggregated from the active ingredients in this product.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation | Rare | Occasional reports, generally in sensitive skin |
| Allergic contact dermatitis | Very rare | Isolated sensitization cases reported |
| Comedogenicity / pore congestion | Rare | Possible in acne-prone skin, generally considered low risk |
| Enhanced penetration of co-formulated irritants | Uncommon | As a penetration enhancer it may increase absorption and irritation potential of other actives. |
| Skin irritation | Very rare | Purified water itself is essentially non-irritating; reactions are typically due to other formulation components or contamination. |
| Allergic/sensitivity reaction | Very rare | True allergy to water is exceedingly rare; aquagenic conditions are a separate medical phenomenon unrelated to standard cosmetic water. |
| Contact irritation | Rare | Mild stinging or transient redness possible, especially on sensitive or compromised skin. |
| Photoallergic reaction | Very rare | Isolated case reports of photosensitivity; uncommon relative to older UV filters. |
| Eye irritation | Uncommon | Can cause stinging if product migrates into the eyes. |
| Mild transient flushing or redness | Uncommon | More likely at higher concentrations or in sensitive skin; usually subsides quickly. |
| Tingling, stinging, or burning sensation | Uncommon | Often associated with higher percentages or compromised barrier. |
| Contact irritation or itching | Rare | Generally dose-dependent and resolves with discontinuation. |
| Skin irritation or mild contact dermatitis | Rare | Occasional reports of localized redness or irritation, generally mild. |
| Allergic contact dermatitis / sensitization | Very rare | Isolated case reports; considered a low-sensitizing UV filter. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
| Ingredient | What it does |
|---|---|
| Diethylhexyl Succinate Emollient / skin-conditioning agent | Diethylhexyl Succinate is a lightweight ester used in cosmetic formulations as an emollient and texture enhancer, providing a smooth, non-greasy skin feel and aiding spreadability. It also functions as a solvent for other ingredients such as sunscreen filters. |
| Propanediol Humectant/solvent | Propanediol is a plant-derived glycol used in skincare as a humectant, solvent, and penetration enhancer that improves moisturization and the spreadability of formulations. It also helps solubilize other ingredients and can boost the efficacy of certain actives. |
| Aqua/Water Solvent/base | Aqua (water) is the most common base ingredient in skincare formulations, acting as a solvent and dispersing medium for other ingredients. It hydrates and forms the vehicle in which actives and emulsions are carried. |
| Drometrizole Trisiloxane Key active UV filter (UVA/UVB) | Drometrizole Trisiloxane (Mexoryl XL) is a broad-spectrum, photostable organic UV filter that absorbs both UVA and UVB radiation, used in sunscreens to provide photoprotection. Its silicone-based structure gives it oil solubility and substantivity on skin. |
| Ethylhexyl Triazone Key active UVB sunscreen filter | Ethylhexyl Triazone is an oil-soluble organic UV filter that strongly absorbs UVB radiation (peak around 314 nm), valued for its high photostability and efficiency at low concentrations. It is commonly used in sunscreens and daily-wear products to boost SPF. |
| Niacinamide Key active Cell-communicating / barrier-repair active | Niacinamide (vitamin B3) is a water-soluble active that supports the skin barrier, regulates sebum, brightens hyperpigmentation, and reduces inflammation. It is widely tolerated across skin types and used in concentrations commonly ranging from 2% to 10%. |
| Diethylamino Hydroxybenzoyl Hexyl Benzoate Key active UVA filter (sunscreen) | Diethylamino Hydroxybenzoyl Hexyl Benzoate (also known as Uvinul A Plus) is an oil-soluble organic UV filter that absorbs primarily in the long-wave UVA range (around 354 nm), helping protect skin from UVA-induced damage. It is photostable and commonly combined with other filters in broad-spectrum sunscreens. |
| Terephthalylidene Dicamphor Sulfonic Acid Key active UV filter (sunscreen) | Terephthalylidene Dicamphor Sulfonic Acid (also known as ecamsule or Mexoryl SX) is a water-soluble organic UVA filter used in sunscreens to provide broad protection against UVA rays. It is photostable and often combined with other filters to enhance coverage. |
| 2-Hexanediol Humectant/preservative-booster | 1,2-Hexanediol (commonly written 2-hexanediol) is a multifunctional diol used in skincare primarily as a humectant, solvent, and preservative-enhancing agent that improves the antimicrobial efficacy of formulations. It is generally well tolerated and considered a base/formulation ingredient rather than a treatment active. |
| Behenyl Alcohol Emollient / Thickener | Behenyl alcohol is a fatty alcohol derived from behenic acid that functions as an emollient, thickening agent, and emulsion stabilizer in cosmetic and skincare formulations. It helps soften the skin and improve product texture and stability. |
| Methyl Trimethicone Volatile silicone emollient/spreading agent | Methyl Trimethicone is a lightweight, volatile silicone used in skincare and cosmetics to provide smooth, non-greasy spreadability and a silky skin feel. It evaporates after application, leaving a dry, soft finish without significant residue. |
| Sodium Polyacryloyldimethyl Taurate Emulsifier / thickener | Sodium Polyacryloyldimethyl Taurate is a synthetic acrylate-based polymer used as a thickening, stabilizing, and emulsifying agent in cosmetic formulations. It helps create smooth, gel-like textures and stabilizes oil-in-water emulsions. |
| Hamamelis Virginiana (Witch Hazel) Leaf Water Astringent / toner | Hamamelis Virginiana (Witch Hazel) Leaf Water is a plant-derived hydrosol used in skincare as an astringent, soothing, and mild antioxidant agent, often to tone skin and reduce the appearance of oiliness or minor irritation. Its activity is attributed to tannins and other polyphenols, though leaf water typically contains lower concentrations than extracts. |
| Tromethamine pH adjuster / buffering agent | Tromethamine (trometamol, TRIS) is an organic amine base used in cosmetic and topical formulations to neutralize acidic components and stabilize pH. It functions primarily as a buffering and neutralizing agent rather than as a therapeutic active. |
| Polyacrylate Crosspolymer-6 Film-forming/sensory-enhancing rheology modifier | Polyacrylate Crosspolymer-6 is a synthetic crosslinked acrylate polymer used in skincare and cosmetic formulations to provide a smooth, silky sensory feel, stabilize emulsions, and help form a light film on the skin. It is a formulation aid rather than a biologically active treatment ingredient. |
| Arachidyl Alcohol Emollient / emulsion stabilizer | Arachidyl alcohol is a fatty alcohol (C20) derived from natural oils that functions as an emollient, thickener, and co-emulsifier to stabilize creams and lotions. It improves texture and helps maintain emulsion consistency in skincare formulations. |
| Caprylyl Glycol Humectant / skin-conditioning agent and preservative booster | Caprylyl glycol is a multifunctional emollient and humectant derived from caprylic acid that helps hydrate skin and enhance the efficacy of preservatives in formulations. It is widely used as a stabilizing and conditioning base ingredient rather than a therapeutic active. |
| Ethylhexylglycerin Preservative booster / skin-conditioning agent | Ethylhexylglycerin is a multifunctional glyceryl ether used in cosmetics primarily as a preservative-enhancing agent and emollient, often paired with phenoxyethanol to broaden antimicrobial efficacy. It also acts as a deodorizing agent and humectant in skincare formulations. |
| Arachidyl Glucoside Emulsifier / surfactant | Arachidyl Glucoside is a non-ionic, plant-derived emulsifier created from fatty alcohols and glucose, used to stabilize oil-in-water emulsions and improve texture. It functions as a formulation aid rather than a treatment active. |
| Sodium Metaphosphate Chelating agent / pH buffer | Sodium metaphosphate is an inorganic polyphosphate salt used in cosmetic formulations primarily to sequester metal ions and stabilize products. It also functions as a mild buffering and texturizing agent in cleansers and other personal care products. |
| Adenosine Key active Anti-aging/soothing active | Adenosine is a nucleoside that signals through cell-surface receptors to promote dermal fibroblast activity and collagen/elastin production, helping reduce the appearance of fine lines and wrinkles. It also has anti-inflammatory and soothing properties at low concentrations commonly used in cosmetics (around 0.04-0.1%). |
| Tocopherol Key active Antioxidant | Tocopherol (vitamin E) is a lipid-soluble antioxidant used in skincare to protect skin and formulations from oxidative damage caused by free radicals and UV exposure. It also functions as a skin-conditioning and emollient agent and can stabilize oils against rancidity. |
| Sodium Hyaluronate Humectant / hydrator | Sodium hyaluronate is the sodium salt of hyaluronic acid, a glycosaminoglycan that attracts and binds water to the skin to improve hydration and surface plumpness. Its lower molecular weight allows better penetration than native hyaluronic acid. |
| Allantoin Key active Soothing/skin-conditioning agent | Allantoin is a naturally derived or synthetically produced compound used in skincare for its soothing, moisturizing, and keratolytic (skin-softening) properties. It promotes cell proliferation and helps calm irritation, commonly appearing in creams, lotions, and after-sun products. |
| Citric Acid pH adjuster / AHA exfoliant | Citric acid is an alpha-hydroxy acid derived from citrus fruits, used primarily to adjust and buffer formulation pH and as a chelating agent, and at higher concentrations as a mild chemical exfoliant. It can promote surface cell turnover and is sometimes included in antioxidant or brightening products. |
| Sodium Benzoate Preservative | Sodium benzoate is a salt of benzoic acid used as a preservative in cosmetic and skincare formulations to inhibit the growth of bacteria, yeast, and fungi, particularly in acidic products. It is most effective at a pH below 5. |
| Potassium Sorbate Preservative | Potassium sorbate is the potassium salt of sorbic acid, used as a mild preservative to inhibit mold, yeast, and some bacterial growth in cosmetic formulations. It is most effective at acidic pH and is often combined with other preservatives for broad-spectrum protection. |
Key active = does the main work. Ingredient explanations are drawn from public databases & literature.
Peer-reviewed papers on the active ingredients in this product, via PubMed.