Common Name(s): Isostearyl isostearoyl stearate,isostearyl isostearoyl stearate,cosmetic functional ingredient,established active
CAS Number: N/a
DESCRIPTION
What It Does: Provides emollient skin conditioning with spreading value determined by the acid-alcohol ester molecular architecture.
Why It's Used: Isostearyl isostearoyl stearate is selected for the c18 stearic–stearyl c18 ester pairing — combining structured waxy emolliency with moderate occlusive film with rich waxy emolliency to deliver the specific logp, spreading coefficient, and sensory signature engineered for the target skin feel profile.
How It Works: Ester polarity controls spreading: branched short-chain fast dry; medium moderate; long chain occlusive. c=o provides polar adhesion.
Typically Found In: Cosmetic formulations
TECHNICAL DETAILS
Primary Category: Active ingredient – cosmetic active
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.1%–10%
SOURCING & ETHICS
Vegan Status: Conditional - feedstock declaration required
Halal Status: Unverified - feedstock declaration required (plant, animal and petrochemical routes all exist)
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier. [audit 2026-07-29 rev2: origin-dependent: the same inci exists in plant, animal and petrochemical versions and the name does not discriminate. determination requires shariah-panel sign-off.]
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Safety documented in cosing at standard formulation concentrations.
Last Verified: 2026-03-22
Primary Sources: Cosing database,isostearyl isostearoyl stearate technical review