C11-12 ISOALKANE

Other

56

Moderate

CAS Number: 64742-48-9/90622-57-4

About C11-12 ISOALKANE

Petroleum-derived branched alkanes used as solvents and emollients in cosmetics, with potential concerns around purity and residual contaminants.

Detailed Analysis

C11-12 Isoalkanes are branched chain hydrocarbons derived from petroleum fractions. They serve as emollients and solvents in cosmetic formulations. EU CosIng does not impose specific restrictions on C11-12 isoparaffins. However, the European SCCS has raised concerns about hydrocarbon solvent impurities including benzene and PAHs. The CIR panel has evaluated similar hydrocarbon solvents as safe with appropriate manufacturing controls. Occupational exposure limits exist for some fractions.

Skin Benefits

  • ✓ Imparts smooth, non-tacky skin feel
  • ✓ Efficient delivery vehicle for oil-soluble active ingredients
  • ✓ Low allergenic potential when highly purified

Known Concerns

  • ⚠ Risk of benzene and PAH contamination from petroleum refining
  • ⚠ Potential for skin penetration of lower molecular weight fractions
  • ⚠ Environmental persistence concerns with branched alkanes

Safety Score

56

Moderate

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

🏛

EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.