Propylene Glycol Butyl Ether

AKA “n-Butoxy-2-propanol, RefChem:75241, 1-Butoxy-2-propanol, 1-Butoxypropan-2-ol, 5131-66-8, 2-PROPANOL, 1-BUTOXY-, n-Butoxypropanol, 2-Hydroxy-3-butoxypropane, Propasol solvent B, 1, 2-Propylene glycol 1-monobutyl ether”

Humectant

Ingredient Facts

Propylene glycol butyl ether

AKA: N-Butoxy-2-propanol, RefChem:75241, 1-Butoxy-2-propanol, 1-Butoxypropan-2-ol, 5131-66-8, 2-PROPANOL, 1-BUTOXY-, N-Butoxypropanol, 2-Hydroxy-3-butoxypropane, Propasol solvent B, 1, 2-Propylene glycol 1-monobutyl ether

Humectant · Humectant · EWG: 2

Synthetic

Humectant

Solvent

Clean

2-Propanol, 1-butoxy-; 1-butoxypropan-2-ol

Solubility Solubility in water, g/100ml: 6 (moderate)

Formula

C7H16O2

Mol. Weight

132.20

CAS #

5131-66-8

Form

Powder

State

Liquid; NKRA

See origin →

Functions

Humectant

A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.

Solvent

Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.

Viscosity Controlling

Locks In Moisture

Traditional Use

Developed in the mid-20th century as a synthetic solvent. Adopted in cosmetics from the 1970s onward as a humectant and solvent in skincare formulations, providing better penetration of active ingredients than traditional glycerin.