Common Name(s): C9-11 pareth-4,peg-4 c9-11 alcohol ether,neodol 91-4 (commercial)
CAS Number: 68439-45-2
DESCRIPTION
What It Does: Helps oil and water mix in formulas and gently removes oil and dirt from skin.
Why It's Used: Used as a mild, low-foam nonionic surfactant in various cleansing and emulsion systems; c9โc11 mixed chain provides good detergency at moderate hlb.
How It Works: 4 eo units on c9โc11 mixed alcohol chain give hlb ~10; low foam character useful in rinse-off cleansers and industrial systems.
Typically Found In: Rinse-off cleansers,low-foam washes,emulsion systems
TECHNICAL DETAILS
Primary Category: Functional ingredient โ surfactant
Secondary Functions: Emulsifying,cleansing,wetting
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ5%
SOURCING & ETHICS
Vegan Status: Conditional - supplier confirmation required
Halal Status: Yes
Source Notes: C9โc11 linear alcohols from petrochemical (oxo-synthesis); eo from petrochemical. [audit 2026-07-29 rev2: status downgraded on audit. determination requires shariah-panel sign-off.]
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 1/5 โ low
Sensitivity Concerns: Generally non-irritating at typical use levels.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile. ewg score: 1โ2.
Works Well With: Anionic surfactants,amphoteric surfactants,nonionic co-surfactants
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
C9โc11 pareth series (neodol-type alcohols): odd-chain mixed composition from oxo-synthesis; 4 eo gives hlb ~10, appropriate for o/w emulsification and low-foam detergency; cas 68439-45-2.
Last Verified: 2026-03-27
Primary Sources: Cosing database,inci dictionary,shell/sasol technical data c9-11 pareth