Butyl Ethyl Propanediol

AKA: 2-Butyl-2-ethyl-1, 3-propanediol, 115-84-4, 1, 3-PROPANEDIOL, 3, 3-Bis(hydroxymethyl)heptane, 2-Ethyl-2-butyl-1, BUTYL ETHYL PROPANE DIOL (BEPG)
Synthetic
Humectant
Skin Conditioner
Not Clean
1,3-Propanediol, 2 –Butyl-2-Ethyl
Formula
C9H20O2
Mol. Weight
160.25
CAS #
115-84-4
Form
Liquid
State
Other Solid
Functions
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
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
Synthetic humectant and solvent developed in the late 20th century for cosmetic formulations. Designed to improve hydration and product stability in skincare and color cosmetics.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Moderate Irritant
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types
Best For
Dehydration
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing
🛡️Safety-assessed2 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR