Diisobutyl Adipate

AKA: Bis(2-methylpropyl) hexanedioate, Ftaflex DIBA, Adipic acid, Diisobutyl ester, Hexanedioic acid, Bis(2-methylpropyl) ester, Plasthall DIBA, Diisobutyl hexanedioate, 1, 6-bis(2-methylpropyl) ester, Adipic acid bis(2-methylpropyl) ester
Synthetic
Emollient
Solvent
Skin Conditioner
Clean
Diisobutyl adipate has been reported in Gymnodinium nagasakiense and Karenia mikimotoi with data available.
Solubility Sol in most org solvents; insol in water
Formula
C14H26O4
Mol. Weight
258.35
CAS #
141-04-8
Form
Liquid
State
Liquid
Functions
Plasticiser
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Locks In Moisture
Traditional Use
Synthetic plasticizer and emollient developed for cosmetic use in the mid-20th century. Created to improve product spreadability and skin conditioning properties.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types
Best For
Dryness
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: PubChem · CosIng · EWG · CIR