Methylpropanediol

CAS Number
2163-42-0
EC Number
606-809-0
Abbreviation
MPD

What is Methylpropanediol?

Methylpropanediol (CAS 2163-42-0), commonly abbreviated as MPD, is a diol solvent and humectant used in personal care, pharmaceutical, and polymer manufacturing.

Where is Methylpropanediol used?

  • Personal care: humectant and solvent in skin creams, serums, and hair care products
  • Pharmaceutical: carrier solvent in topical preparations where controlled penetration and stability are required
  • Polymer chemistry: monomer or chain extender in polyesters, polyurethanes, and UV-curable resins
  • Coatings and adhesives: reactive intermediate to tune film performance
  • Its low viscosity and strong solvency make it a practical alternative to propylene glycol.

Good to know: Cosmetic-grade material meets purity requirements suitable for leave-on and rinse-off personal care applications. Pharmaceutical-grade supply is available from select manufacturers for use in regulated topical formulations.

Commercial specifications

  • Clear, low-viscosity liquid in standard drum and IBC quantities

Other Names (Synonyms)

2-methyl-1,3-propanediol|2-methylpropane-1,3-diol|MPD

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What are the physical properties of Methylpropanediol?

Melting Point -91 °C
Boiling Point 214.00 °C
Density 1.020 g/cm³ @ Temp: 20 °C
Flash Point >230 °F
Color Colourless
Odor little to no odor
Form Oil
Refractive Index n 20/D 1.445(lit.)
Log P -0.740 (est)

Which trade and regulatory codes apply to Methylpropanediol?

HS Code 2905.39.9000
Storage Class 10 - Combustible liquids
WGK (Germany) 1
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