Bertholletia Excelsa Seed Oil PEG-8 Esters
AKA: Brazil Nut Oil PEG-8 Esters
Allergen Warning
⚠️ Tree Nut (Brazil Nut)
Plant-Derived
Skin Conditioner
Hair Care
Not Clean
Bertholletia Excelsa Seed Oil PEG-8 Esters is a complex mixture of esters formed from the transesterificaton of Bertholletia Excelsa Seed Oil and PEG-8
Family
Lecythidaceae (Brazil nut family)
Plant Part
Seed
CAS #
160965-04-8
Form
Oil
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
A modern synthetic derivative created in the late 20th century by chemically modifying Brazil nut oil with polyethylene glycol. Developed to improve the solubility and texture of natural oil in cosmetic formulations.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR