What Is Acrylates Crosspolymer-5?
Acrylates Crosspolymer-5 is a synthetic ingredient made by linking together small molecules of acrylic acid or methacrylic acid (or their simple esters) with an allyl ether of pentaerythritol. This crosslinked structure forms a three-dimensional network that swells in water, giving it unique thickening abilities. Developed in the late 20th century as chemists looked for more efficient alternatives to traditional thickeners, it quickly gained popularity for its clarity, versatility and ease of use.
Manufacturing starts with the controlled polymerization of acrylic or methacrylic monomers in the presence of the allyl ether crosslinker. The resulting powder is purified and dried, then milled into a fine, white, free-flowing powder. When dispersed in water or a water-based formulation, it hydrates and forms a smooth gel that can trap and stabilize other ingredients.
The ingredient appears in a wide range of cosmetics: facial cleansers, serums, sheet mask essences, lightweight moisturizers, sunscreens, color cosmetics like foundations and BB creams, hair gels and leave-in treatments. Formulators appreciate its ability to create elegant textures without a heavy or greasy feel, making it suitable for modern, fast-absorbing products.
Acrylates Crosspolymer-5’s Cosmetic Benefits/Uses
This ingredient is prized for a single standout job
Viscosity controlling: Acrylates Crosspolymer-5 thickens water-based formulas at very low use levels, creating a stable, silky gel that spreads easily on skin or hair. By adjusting the amount, chemists can fine-tune a product’s texture from fluid lotion to rich cream. Its clarity makes it ideal for transparent gels, and its ability to suspend pigments or exfoliating beads helps keep formulas homogeneous over time.
Who Can Use Acrylates Crosspolymer-5
Acrylates Crosspolymer-5 is considered suitable for virtually all skin types. Its light texture works for oily or combination skin while its water binding ability gives dry or mature skin a smoother feel. Because it is chemically inert and used at low concentrations, even sensitive or redness-prone skin usually tolerates it without trouble.
The polymer is fully synthetic and contains no animal-derived materials, so it fits vegan and vegetarian lifestyles. Most suppliers also certify it as cruelty free, though users should check the finished product’s policy to be certain.
The large molecular size keeps it on the surface of the skin, meaning minimal absorption. Current safety assessments list no specific restrictions for pregnancy or breastfeeding. This is not medical advice and anyone who is pregnant or nursing should review their skincare routine with a qualified doctor to be safe.
Acrylates Crosspolymer-5 does not cause photosensitivity and can be worn day or night without affecting how the skin handles sunlight. It is also compatible with common actives like vitamin C, niacinamide or AHAs, so formulators can use it in a wide range of products.
Potential Side Effects/Adverse Reactions
Reactions to topical Acrylates Crosspolymer-5 vary from person to person. The issues listed below are possible yet uncommon when the ingredient is used correctly in a finished product.
- Mild skin irritation: a transient feeling of burning or stinging, most often in very sensitive skin
- Redness or itching: localized flare-ups that calm once the product is removed
- Allergic contact dermatitis: rare immune response producing persistent rash or swelling
- Eye irritation: watering or discomfort if gel or powder accidentally gets into the eyes during application or manufacturing
- Follicular occlusion: extremely heavy or layered use could trap oil and debris around hair follicles, potentially triggering small bumps in acne-prone users
If any unwanted reaction develops stop using the product and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 0 / 5
Acrylates Crosspolymer-5 is a large water-swelling molecule that sits on the surface of skin and contains no oily or waxy components that could block pores. Because it is used at very low levels and is chemically inert it does not feed acne-causing bacteria or solidify inside follicles. For these reasons it earns a solid zero on the comedogenic scale.
That said, very heavy layering of multiple gel products thickened with this polymer might trap existing sebum and debris which could contribute to congestion in highly breakout-prone skin. In normal use it remains an acne-friendly choice.
Suitable for acne-prone skin
Summary
Acrylates Crosspolymer-5 is mainly valued as a viscosity controller that turns watery formulas into smooth clear gels, suspends pigments, and helps stabilize emulsions. It pulls this off by forming a three-dimensional network that swells in water and locks ingredients in place so the final product feels silky, spreads evenly and stays consistent over time.
The polymer enjoys steady popularity among formulators thanks to its ease of use and versatility although it is one of several similar options on the market rather than a headline superstar. Safety reviews rate it as low risk with minimal irritation potential and no known hormonal or systemic concerns. Still, whenever you try a new product containing Acrylates Crosspolymer-5 it is smart to patch test first to make sure your skin agrees with the full formula.