The ingredient, explained
Methylpropanediol
A published expert safety assessment covers the exact ingredient in the specified exposure context.
Ingredient guide
What it is and what it does
2-Methyl-1‚3-propanediol
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Solvent
- Dissolves other ingredients in a formula.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗
Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.
A closer look
What the research shows
Safety assessment
Panel judged seven listed diols, including methylpropanediol, safe in described cosmetic uses.
What this does not tell us
Grouped safety assessment uses read-across; excludes three other diols from safe conclusion. No efficacy or unlimited-exposure claim.
Sources for this summary. PubMed 38174390 ↗
Research review checked Oct 1, 2026
Bounded review of local candidates, exact-name indexed primary journal/PubMed safety and topical searches; not a systematic review.
Ingredient research is not proof that a product containing this ingredient works.
Read the 1 selected study
Safety assessment
Safety Assessment of Alkane Diols as Used in Cosmetics. ↗
International journal of toxicology · 2024
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
Registry identity
2-Methyl-1‚3-propanediol
- INCI name on ingredient lists
- METHYLPROPANEDIOL
- CAS registry number
- 2163-42-0
- EC number
- 412-350-5
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026