Ditrimethylolpropane

CAS Number
23235-61-2
EC Number
245-509-0

What is Ditrimethylolpropane?

Ditrimethylolpropane (CAS 23235-61-2), also referred to as di-TMP, is a tetrafunctional polyol derived from trimethylolpropane.

Where is Ditrimethylolpropane used?

  • Coatings: crosslinker and backbone polyol in radiation-curable and high-solids systems
  • Lubricants: esterified with fatty acids or complex acid blends to produce polyol ester base fluids with strong thermal stability
  • Adhesives and sealants: incorporated into polyurethane and polyester systems to increase crosslink density
  • UV-curable inks: contributes to fast cure response and adhesion to demanding substrates
  • Its four hydroxyl groups make it a reactive building block for high-crosslink-density polymers.

Commercial specifications

  • 98% minimum assay
  • Technical and industrial purity grades
  • Bags or drums for bulk industrial procurement

Other Names (Synonyms)

2-[2,2-bis(hydroxymethyl)butoxymethyl]-2-ethylpropane-1,3-diol|di-trimethylolpropane

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What are the physical properties of Ditrimethylolpropane?

Melting Point 109.5 °C
Boiling Point 239 °C @ Press: 3 Torr
Density 1.0187 (rough estimate)
Color White to Almost white
Form powder to crystal
Water Solubility 21g/L at 20℃
Vapor Pressure 0Pa at 25℃
Refractive Index 1.4560 (estimate)
Log P 0.88 at 25℃

Which trade and regulatory codes apply to Ditrimethylolpropane?

HS Code 29094990
WGK (Germany) 3
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