Bella GLOW Skincare
Weightless Broad Spectrum Sunscreen SPF50
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Polyquaternium-51
Polyquaternium-51 is listed in CosIng with formula roles skin conditioning, and film forming.
- INCI name
- Polyquaternium-51
- CAS number
- 125275-25-4
A single molecular structure has not been verified for this record.
Its role in a formula
Polyquaternium-51
- Skin conditioningleaves skin feeling smoother or better cared for
- Film formingleaves a thin film on skin or hair after it dries
Recorded formula roles, not a prediction of a finished product’s results.
About the sourcesAbout Polyquaternium-51: what the sources say
What is Polyquaternium-51?
2-(N,N,N-Trimethylamino)ethyl 2-(2-methyl-2-propenoyloxy)ethyl phosphate inner salt, polymer with butyl 2-methyl-2-propenoate
European Commission CosIng · ingredient identityWhat is it used for in a formula?
The source lists these formulation categories. Their meanings describe cosmetic roles, not a tested result for every product.
- skin conditioning
- An ingredient in this category leaves skin feeling smoother or better cared for.
- film forming
- An ingredient in this category leaves a thin film on skin or hair after it dries.
What reading is available?
- 1 cosmetic-science references
- 3 research papers
Compiled from the sources linked above. Source authors have not reviewed beautydew labs. Related reading and formulation classifications do not establish a finished product’s effectiveness, suitability, concentration or safety.
Evidence and limits for Polyquaternium-51
The listed functions explain its role in a formula. They do not establish whether a finished product will suit your skin.
No reviewed benefit claim is available here yet. Compare the complete formula, its directions, and your own skin preferences.
What a CosIng listing meansBeauty reading & sources
Cosmetic ingredient reviews (1)
Ingredient function, formulation and safety background from cosmetic-science publishers. Industry affiliation is disclosed below.
- Safety Assessment of Acryloyloxyethyl Phosphorylcholine Polymers as Used in Cosmetics
Cosmetic Ingredient Review (CIR)
Industry-funded cosmetic ingredient safety review; not government approval.
June 17, 2022
Final Report. Exact ingredient names checked in the report; group assessments can include read-across from related ingredients. Not a benefit claim or an independent clinical review.
Research papers (3)
Related papers naming this ingredient or a sourced alternative name in metadata or available article text. Laboratory, clinical, oral, topical and mixed-formula studies have different scopes. These links are not reviewed benefit claims.
- Prevention and Care for Incontinence-Associated Dermatitis Among Older Adults: A Systematic Review.
Journal of multidisciplinary healthcare · 2021
Related cosmetic research; ingredient names checked in available article text. Mixtures, laboratory work and clinical studies have different scopes; this is not an isolated-ingredient efficacy assessment.
- Minimum wiping pressure and number of wipes that can remove dirt during bed baths using disposable towels: a multi-study approach.
BMC nursing · 2023
Related cosmetic research; ingredient names checked in available article text. Mixtures, laboratory work and clinical studies have different scopes; this is not an isolated-ingredient efficacy assessment.
- Effectiveness of Three Types of Moisturizers on Senile Dry Skin: A Randomized Controlled Pilot Trial.
Dermatology research and practice · 2023
PubMed is hosted by the U.S. National Library of Medicine. Listing there does not mean NIH authored or endorses a paper.
Cosmetic ingredient references
- Polyquaternium-51 in COSMILE Europe
Industry ingredient directory · matched to the publisher’s ingredient index.
- Polyquaternium-51 in INKEEDecoder
Commercial ingredient explainer directory, formerly INCIDecoder · matched to its publisher index; claims not independently reviewed.
- European Commission CosIng database
Catalog reference 58830. Database inclusion is not approval or proof of safety or effectiveness.
Where it fits in real formulas
Related ingredients, common formula neighbors, naming, and catalog context. This stays separate from evidence and personal-fit guidance.
Similar ingredients
related by documented function or concern
Hydrolyzed KeratinConditions hair and smooths a damaged, rough cuticleHyaluronic Acid (salt form)Pulls water into the skin for immediate hydration and a plumper lookPro-vitamin B5Moisturizes and improves hydration by drawing and holding water in the skinAllantoinHelps condition and soften the skin surfaceCeramide NpHelps replenish surface lipids within an appropriately formulated moisturizerCicaFunctions as a botanical skin-conditioning ingredient
What kinds of products contain Polyquaternium-51?
Real brands and product categories from the 3 decoded products listing Polyquaternium-51 — an observation of our catalog, not a claim about market share.
3 of 7,164 decoded products list this ingredient. Count calculated on (UTC). Counts describe our recorded labels, which may differ from current packaging; the public product list can be smaller than the decoded catalog.
How we collect ingredient listsProduct categories
serums (1), sunscreens (1)
Commonly appears alongside
How often another ingredient appears in the same decoded products. This does not show routine compatibility.
Which products contain Polyquaternium-51?
All 2 →2 public products list this ingredient.
Catalog preview
A compact look at the first products in this result set
1–1 / 2
About the sources
Ingredient lists show presence and order, not concentration, pH, ingredient grade, delivery system, or finished-formula performance.
Sources & methodologyCompiled from the EU CosIng database (ref 58830) · snapshot 16 June 2026. CosIng is an informational, non-legally-binding reference. Inclusion does not mean an ingredient is approved, safe, authorized for cosmetic use, or clinically effective. An INCI list does not reveal concentration, pH, ingredient grade, delivery system, or finished-formula performance.