A lightweight solvent that helps blend ingredients smoothly and keeps the formula at the right consistency for easy application.
Solubility greater than or equal to 100 mg/mL at 72 °F (NTP, 1992)
Formula
C6H14O2
Mol. Weight
118.17
CAS #
111-76-2
Form
Liquid
State
Ethylene glycol monobutyl ether appears as a colorless liquid with a mild, pleasant odor. Less dense than water. Flash point 160 °F. Irritates skin and eyes and may be toxic by ingestion. Used as a so
See origin →
Functions
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Viscosity Controlling
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Moisturizing
Locks in moisture to keep skin soft and supple throughout the day
Strengthens Barrier
Provides scent
Dissolves other ingredients
Controls product thickness
Traditional Use
A synthetic solvent first synthesized in the early 20th century and incorporated into cosmetics as a solubilizer and preservative booster. It has no traditional cosmetic or medicinal use.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
8
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
ewg-8
medical-approval
all-shades-safe
Concentration Guide
4.0%
0%6%
Reg. Limit
EU regulatory limit: 4.0%. a) 4.0% b) 2.0% Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 188.