C13-16 Isoalkane


New ingredients

No known benefits

C13-16 Isoalkane at a glance

  • A synthetic solvent but may also be plant-derived
  • Used in blends meant to replace siloxane silicones
  • Light fluid has a skin-silkening after-feel
  • Formerly known as C13-16 isoparaffin

C13-16 Isoalkane description

C13-16 isoalkane is a synthetic solvent that may also be plant-derived (Paula’s Choice Skincare uses the latter, and it is not palm-derived). It can be used on its own but more often is used in blends meant to replicate the sensory and smoothing properties of siloxane-type silicones. Other benefits include helping to reduce the viscosity (thickness) of a cosmetic formula as well as improving spreadability without leaving an occlusive feel. This ingredient was formerly known as C13-16 isoparaffin. This retired name that as part of a safety assessment done in 2012, which deemed it safe in typical usage amounts between 0.4–18%.

C13-16 Isoalkane references

  • International Journal of Toxicology, November-December 2021, Supplement 6, pages 269S–296S

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.