Ingredients

Methylpropanediol

What methylpropanediol does as a solvent and hydrator, why its name does not make it a drying alcohol, and how it fits into a routine.

Extremely safeIn 23 products we cover

Also known as 2-Methyl-1,3-propanediol

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Quick facts

INCI name
Methylpropanediol
CAS number
2163-42-0
Origin
Synthetic
Chemical class
Glycol (diol)
What it does in a formula
solvent, humectant, skin conditioning
Why it is in the formula
Methylpropanediol helps dissolve ingredients and can add a light hydrating feel to water-based products.

What it is

A small glycol containing two alcohol groups, methylpropanediol is a synthetic organic solvent and humectant used across skincare products. It assists formulators by dissolving poorly water-soluble ingredients and dispersing them evenly throughout a mixture. At the same time, it helps draw moisture to the surface for a hydrated skin feel.

The name can cause confusion. Methylpropanediol is not the same as the quick-evaporating alcohols people usually mean when they worry about a product feeling drying. It is also not identical to propanediol or the ingredients often labeled alcohol denat. Those materials have different structures and functions. Similar-sounding names do not mean every glycol has the same feel or role. You can read more about alcohol denat to compare the label names.

What it does

  • Dissolves ingredients. As a solvent, it can help other components distribute in a water-based formula.
  • Adds a humectant effect. It can help attract water and support a hydrated skin feel, though the formula’s other humectants and moisturizers matter too.
  • Supports application. Solvents can affect how a formula spreads and dries down, usually alongside several other texture ingredients.
  • Helps formulate actives. It can be included to make certain ingredients easier to incorporate, not because it is necessarily the star of the product.

Who it suits

Methylpropanediol is not a drying alcohol and does not belong in the same mental category as alcohol denat. It may be present in products for many skin types. If you have sensitive skin, remember that a formula with this glycol can still contain other ingredients that do not agree with you. Try one new product at a time and stop if it causes persistent discomfort. A product label does not reveal the percentage of methylpropanediol or predict exactly how it will feel on your skin.

What to pair it with, and what not to

There is no ingredient it needs to be paired with. It can appear alongside humectants, soothing ingredients and actives in a finished serum or moisturizer. Use the product as directed and add a moisturizer if the formula does not provide enough comfort on its own.

Skin Realist check: A long name is not a warning label. Sometimes the unglamorous solvent is doing the useful behind-the-scenes work.

Quick picks with Methylpropanediol

Picked from label facts only. We haven't tested these products.

All 23 products with Methylpropanediol

Eye Creams & Under-Eye Patches (4)

Daily Moisturizers & Water Gel Creams (4)

Targeted Vitamin C & Brightening Correctors (3)

Daily Sunscreens & SPF Moisturizers (2)

Hydrating Serums, Essences & Ampoules (2)

Body Creams, Butters & Body Oils (1)

Dermatological Acne & Chemical Exfoliating Liquids (1)

Hydrating Toners, Essence Waters & Face Mists (1)

Premium Overnight Recovery Packs & Sleeping Facials (1)

Premium Double-Cleansing Balms & Melting Gels (1)

Gel, Foam & Cream Facial Cleansers (1)

Full-Coverage Camouflage & Liquid Foundations (1)

High-Definition Camouflage Concealers (1)

Common questions

Is methylpropanediol a drying alcohol?

No. Methylpropanediol is a glycol, a type of diol, and it is used as a solvent and humectant. It is chemically different from volatile alcohols such as alcohol denat.

What does methylpropanediol do in skin care?

It helps dissolve other ingredients and may contribute a light, hydrating feel. It is usually a supporting ingredient in a serum or moisturizer.

Is methylpropanediol the same as propanediol?

No. They are related glycols, but methylpropanediol has a different molecular structure from propanediol. A label's exact name matters.

Can sensitive skin use methylpropanediol?

Many people encounter glycols in everyday formulas, but any ingredient can bother some users. If a product irritates you, consider the whole formula and patch-test new products.

Sources