Other Trading Names:

  • TMP
  • 2-Ethyl-2-(hydroxymethyl)-1
  • 3-propanediol

CAS Number: 77-99-6

HS Code: 29054100

Types of Packaging:

  • 25 kg Bags
  • 500 kg Bags
Inquiry right-arrow $100.00
Availability: In stock

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Chemical Name




Molecular Formula


CAS Number



White flake

Grade Standard

Industrial Grade


H2O: 0.1 g/mL, clear

Melting Point

56-58 °C

Boiling Point

159-161 °C2 mm Hg(lit.)


1.176 g/cm³

Chemical Description

  • Trimethylolpropane (TMP) is a trihydric alcohol, characterized by its molecular structure containing three hydroxyl groups attached to a central carbon atom, which is itself bonded to an ethyl group. This configuration makes TMP a valuable building block in various chemical syntheses and applications.
  • TMP has a moderately low melting point, making it easy to handle and mix in various formulations. It's highly soluble in water and most organic solvents, broadening its utility across different industrial sectors.
  • In the realm of polyurethane production, TMP is prized for its ability to enhance the properties of polyurethane foams, elastomers, and coatings. Its three hydroxyl groups contribute to the formation of cross-linked structures, providing materials with superior hardness, flexibility, and chemical resistance.
  • The production of alkyd resins, used in high-quality paints and coatings, utilizes TMP to improve the final product's durability, gloss, and drying properties. Its incorporation into synthetic lubricants enhances thermal stability and hydrolytic stability, crucial for high-performance engine oils and industrial lubricants.
  • In the pharmaceutical industry, TMP serves as a safe and effective excipient, facilitating the formulation of drugs by improving their stability, solubility, and bioavailability.
  • Additionally, TMP is a key component in the synthesis of certain types of surfactants and plasticizers, contributing to the production of flexible plastics and enhancing the effectiveness of detergents and personal care products.
  • Its applications extend into the fields of construction and electronics, where TMP-based polymers and compounds offer advantages in terms of thermal stability, mechanical strength, and insulation properties.
  • Despite its wide range of applications, TMP is considered to have a favorable environmental profile due to its biodegradability and low toxicity, aligning with the growing demand for more sustainable chemical products and processes.
  • Trimethylolpropane's versatility and favorable properties make it an essential ingredient in numerous formulations, underlining its significance in modern industrial practices and its contribution to advancements in materials science and technology.
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