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ARABINOXYLAN

CAS 9040-27-1
78

Safety score Β· 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A plant-derived hemicellulose polysaccharide β€” found in the cell walls of grains like wheat and rice β€” that forms a invisible, breathable film on skin for a smoother, more resilient barrier.

Arabinoxylan is a hemicellulose polysaccharide abundant in the primary cell walls of monocotyledonous plants, particularly cereal grains including wheat, rice, barley, and corn. It consists of a backbone of beta-1,4-linked xylose residues with substitutions of arabinose side chains and ferulic acid ester groups. The arabinose:xylose (A/X) ratio determines solubility and functionality β€” higher arabinose substitution improves water solubility. The ferulic acid ester linkages allow arabinoxylans to form covalent cross-links through peroxidase-mediated dimerization, which can strengthen the film-forming network on skin. On the skin surface, arabinoxylan creates a thin, flexible, oxygen-permeable film that reduces friction, improves texture, and can reduce water loss. It is also known as xyloarabinan per the CosIng description.

Function

FILM FORMING

Skin benefits

  • Film-forming reduces skin friction and improves smoothness
  • Supports skin barrier by reducing transepidermal water loss
  • Can enhance delivery of other active ingredients
  • Provides a light, breathable protective layer

Known concerns

  • Grain-derived β€” potential allergen for individuals with cereal grain allergies
  • May be contaminated with gluten if sourced from wheat β€” relevant for celiac-affected consumers
  • Limited data on long-term repeated exposure safety

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.