Acrylates/Octylacrylamide Copolymer

INCI: ACRYLATES/OCTYLACRYLAMIDE COPOLYMER

Acrylates/Octylacrylamide Copolymer (CAS 129702-02-9) is a cosmetic cosmetic ingredient functioning as Film-forming polymer; waterproofing, smudge-proof, and transfer-proof agent; UV . EU Regulation 1223/2009 status: permitted.

CAS Number
129702-02-9
Function
Film-forming polymer; waterproofing, smudge-proof, and transfer-proof agent; UV filter substantivity booster for 40/80-min water-resistance claims
Safety Rating
GOOD

Chemistry & Identifiers

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes FDA classifies as a cosmetic ingredient, not a sunscreen active. Listed as approved inactive ingredient in FDA databases. No specific concentration limits imposed. Reported in 117 cosmetic formulations in 2022 VCRP data; maximum use 7% leave-on, up to 19.4% in dentifrices. CIR Expert Panel issued final safety assessment April 2022: safe as used provided acrylamide monomer does not exceed 5 ppm in finished formulations. Safety not assessed for airbrush application routes.

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Safety Data

Margin of Safety, dermal absorption, and sensitization profile summaries for Acrylates/Octylacrylamide Copolymer - available to Pro subscribers.

Calculate MoS for your specific formulation with the MoS Calculator.

Additional Ingredient Properties

6 property records from structured ingredient metadata.

ecotoxicity
{"biodegradable": "no", "biodegradation_days": "365+", "bioaccumulative": "no", "aquatic_toxicity_level": "low", "coral_reef_safe": "unknown", "marine_toxicity": "physical harm", "freshwater_toxicity": "persistent", "endocrine_disruptor": "no", "persistent_organic_pollutant": "no", "microplastic": "yes", "nano_particle": "no", "hawaii_banned": "no", "eu_restricted_environmental": "no", "palm_oil_d…
ph_stability
{"optimal_ph_min": "4.0", "optimal_ph_max": "9.0", "stable_ph_min": "3.5", "stable_ph_max": "10.0", "ph_dependent_function": "Film former for sunscreens", "formulation_note": "Waterproofing agent", "source": "Formulation literature"}
polymer
{"ingredient_class": "film_former/hair_fixative", "polymer_type": "synthetic_copolymer", "chemical_backbone": "acrylic/amide", "molecular_weight_Da_range": "80000-300000", "ionic_character": "anionic", "pH_viscosity_sensitivity": "moderate", "salt_tolerance": "moderate", "electrolyte_effect_on_viscosity": "moderate", "temperature_viscosity_sensitivity": "moderate", "film_transparency": "transparen…
rheology
{"cas_number": "126950-62-7", "rheology_modifier_type": "Synthetic Polymer - Octylacrylamide associative", "thickening_mechanism": "Hydrophobic association with surfactants", "viscosity_increase_factor": "40000-100000x", "brookfield_viscosity_typical_cps": "30000-65000", "shear_thinning_behavior": "Yes", "thixotropic": "Yes", "yield_stress_pa": "35-60", "flow_curve_type": "Pseudoplastic with yield…
sensory
{"silky": "gel-like", "smooth, glides easily": "smooth, water-resistant", "dry-touch, non-greasy": "protected, long-lasting", "instant": "moderate", "low": "medium", "w/o": "o/w", "very-high": "moderate", "no": "no", "yes": "yes", "1.40": "1.50", "transparent": "transparent", "colorless": "colorless", "excellent": "fair", "light": "light", "synthetic": "synthetic"}
uv_stability
{"uv_stable": "yes", "uv_degradation_rate": "stable", "photosensitizer": "no", "phototoxic": "no", "photoallergic": "no", "requires_uv_protection_packaging": "no", "color_change_uv": "no", "odor_change_uv": "no", "efficacy_loss_uv_pct": "0", "spf_contribution": "no", "uva_protection": "no", "uvb_protection": "no", "photostable_sunscreen": "no", "boost_spf_of_others": "no", "antioxidant_under_uv": …

Expert Verdict

Expert safety assessment and concern-level summary for Acrylates/Octylacrylamide Copolymer - available to Pro subscribers.

Regulatory Flags

film-former hair-fixing high-molecular-weight polymer acrylamide-impurity-watch no-dermal-absorption vcrp-reported cir-approved-2022 no-sccs-opinion leave-on-safe ifra_fragrance

Frequently Asked Questions

Is Acrylates/Octylacrylamide Copolymer safe in cosmetics?

CAS 129702-02-9. EU: permitted ingredient listed in CosIng (Ref No. 31660) with no Annex III/V/VI restrictions. Not subject to EU polyacrylamide Annex III entry 131 restriction (free acrylamide). CIR Expert Panel (March 2022) concluded safe in present practices of use and concentration, provided acrylamide monomer in finished formulations does not exceed 5 ppm. Safety not evaluated for airbrush application. Used in 117 formulations per 2022 VCRP data; maximum reported use 7% leave-on (mascaras), up to 19.4% in dentifrices. Practical note: no systemic concern due to high molecular weight and negligible absorption; acrylamide monomer impurity control essential in QC SOPs. The EU classifies Acrylates/Octylacrylamide Copolymer as "permitted". Safety rating: GOOD.

Is Acrylates/Octylacrylamide Copolymer allowed in the EU?

Acrylates/Octylacrylamide Copolymer EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Acrylates/Octylacrylamide Copolymer do in cosmetics?

Acrylates/Octylacrylamide Copolymer functions as: Film-forming polymer; waterproofing, smudge-proof, and transfer-proof agent; UV filter substantivity booster for 40/80-min water-resistance claims. It is classified as a cosmetic ingredient in our database. CAS number: 129702-02-9.

What is the Margin of Safety for Acrylates/Octylacrylamide Copolymer?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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