Dimethylolpropionic Acid (DMPA)
Chemical Name: 3-Hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid
Molecular Formula: C₅H₁₀O₄
CAS Number: 4767-03-7
Essential trifunctional intermediate enabling high-performance waterborne coatings, polyurethane dispersions, alkyds, and polyesters with superior stability and environmental benefits.
Technical Specifications
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Chemical Identity
| Chemical Name | 3-Hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid |
| Synonyms | 2,2-Bis(hydroxymethyl)propionic acid, DMPA |
| CAS Number | 4767-03-7 |
| EC Number | 225-306-3 |
| Molecular Formula | C₅H₁₀O₄ |
| Molecular Weight | 134.13 g/mol |
VUP Specifications (Standard Grade)
| Property | Specification |
|---|---|
| Appearance | White crystalline powder |
| Purity | min. 98.5 % wt |
| Acid Value | min. 412 mg KOH/g |
| Hydroxyl Value | min. 824 mg KOH/g |
| Water Content | max. 0.3 % wt |
| Ash Content | max. 0.03 % wt |
Note: Specifications that are provided above are typical values and should not be considered as guaranteed analysis.
Key Features & Benefits
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Enables Waterborne Formulations
Carboxylic acid group allows easy incorporation into resins, promoting water dispersibility after neutralization for environmentally preferred systems.
Improves Coating Properties
Contributes to fast air-drying, high gloss, superior toughness, flexibility, and improved early water spot resistance in various coating systems.
Enhances Adhesion
Polar carboxyl groups improve adhesion of coatings and elastomers to various substrates including plastics, glass, and steel.
High Purity & Consistency
Offered at minimum 98.5% purity ensuring reliable performance and consistent results with low sodium grade available for sensitive applications.
Versatile Reactivity
Trifunctional structure with two primary hydroxyls and one tertiary carboxyl allows versatile use in polymer synthesis and water dispersion.
Low Toxicity Profile
Essentially non-toxic (Oral LD50 > 2000 mg/kg, rat) offering a safer alternative to other monomers used for similar purposes.
Applications
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Waterborne PUDs
Key internal emulsifier for stable polyurethane dispersions enabling low-VOC automotive and industrial coatings.
Water-Soluble Alkyds
Improves hydrolytic stability in alkyd resins for high-performance wood and furniture coatings.
Powder Coatings
Enhances flow, gloss, and impact resistance in epoxy-polyester and polyester-based powder systems.
Electro-deposition Coatings
Provides acid functionality crucial for automotive primers and demanding industrial E-coat applications.
Product Information & Technical Documents
Essential information and documentation for Dimethylolpropionic Acid (DMPA)
Product Identification
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Technical Documents
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Technical Data Sheet (TDS)
Complete technical specifications, physical properties, and application information for Dimethylolpropionic Acid (DMPA)
Safety Data Sheet (SDS)
Safety information, handling procedures, and regulatory details for Dimethylolpropionic Acid (DMPA)
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Frequently Asked Questions
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