Methylpropanediol
AKA “3-propanediol, 3-Propanediol, .BETA.-HYDROXYISOBUTANOL, HSDB 7267, MP Diol, RefChem:818687, 3Propanediol”
Synthetic
Ingredient Facts
Methylpropanediol
AKA: 3-propanediol, 3-Propanediol, .BETA.-HYDROXYISOBUTANOL, HSDB 7267, MP Diol, RefChem:818687, 3Propanediol
Synthetic · Humectant · EWG: 4
Synthetic
Humectant
Solvent
Skin Conditioner
Synthetic
Clean
A lightweight helper ingredient that keeps formulas smooth and stable, allowing other beneficial ingredients to blend seamlessly into your product.
Solubility In water, greater than or equal to 3000 mg/L at 25 °C
Formula
C4H10O2
Mol. Weight
90.12
CAS #
2163-42-0
Form
Liquid
State
Liquid
See origin →
Functions
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
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.
Dissolves Ingredients
Dissolves other ingredients
Traditional Use
Insufficient ingredient name provided; cannot identify or describe traditional use.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Refreshing Water Mist
COOLA
holi (sun) spf 50 dewy tinted skin drops
Agent Nateur
the body duo
Agent Nateur
lactic acid cleanser duo
Agent Nateur
the vitamin c and hyaluronic brightening duo
Agent Nateur
holi (soleil) firming & plumping mineral spf 50 sunscreen
Agent Nateur
the after (glow) set: ruby
Agent Nateur
the after (glow) set: rose quartz
Agent Nateur
Sunlit Essentials Set
Indie Lee
Tulip Dew Sunscreen Serum
Bloom Effects
Tulipscreen™ Hydrating Lip Oil
Bloom Effects
Radiance Reset
Bloom Effects
Everyday Radiance Essentials
Bloom Effects
Daily SPF 50 Primer
Indie Lee
Supernatural Radiance Serum Broad Spectrum SPF 30 Sunscreen
RMS Beauty
SunCoverup Super Tint Broad Spectrum SPF 50 Sunscreen
RMS Beauty
The ILIA Look
ILIA Beauty
Super Serum Skin Tint SPF 40
ILIA Beauty
Super Serum Skin Tint SPF 30
ILIA Beauty
SunCoverup Super Tint SPF 50
RMS Beauty
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR