Ammonium Acryloyldimethyltaurate vp Copolymer
Also known as Ammonium acryloyldimethyltaurate/VP copolymer, Aristoflex AVC, Ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer
“CIR Expert Panel says: safe as used in cosmetics.”
Ammonium Acryloyldimethyltaurate/VP Copolymer is a copolymer of the acrylamide-sulfonic acid monomer acryloyldimethyltaurate (ammonium salt) and vinylpyrrolidone, sold commercially as Aristoflex AVC. The CIR Expert Panel for Cosmetic Ingredient Safety assessed 30 vinylpyrrolidone polymers in 2024 (IJT 43, Suppl. 4) and concluded that 27, including this copolymer, are safe in cosmetics in present practices of use and concentration. The ingredient is used as a rheology modifier and thickener in leave-on and rinse-off formulations at concentrations up to 0.4% in spray products; recent pharmaceutical formulation studies (PMIDs 38831914, 39857623) confirm non-irritating behavior in topical gels at concentrations tested. No ingredient-specific safety concerns beyond residual monomer management (addressed by the CIR panel at the class level) have been identified.
CIR Expert Panel (2024) found Ammonium Acryloyldimethyltaurate/VP Copolymer safe in cosmetics in present practices of use and concentration
Effective rheology modifier and gelling agent for aqueous and oil-in-water systems at low use concentrations (typically 0.4–2%)
Non-irritating in topical formulations; HET-CAM and in vitro studies confirm low irritation potential
High molecular weight synthetic polymer; not expected to penetrate intact skin
- · May release ammonia under alkaline conditions per CIR report chemistry data
Class-level residual monomer concern (acrylamide and vinyl formamide impurities from synthesis) addressed by CIR panel — management via cGMPs expected; no ingredient-specific quantitative data published
CIR Quick Reference Table (October 2024) — Ammonium Acryloyldimethyltaurate/VP Copolymer row: Finding=S, Citation=IJT 43(Suppl. 4):5-41, …
“Ammonium Acryloyldimethyltaurate/VP Copolymer S IJT 43(Suppl. 4):5-41, 2024”— QRT-Update-100824_0.pdf, p. 16