
2 2 Bis hydroxymethyl butyric acid with the molecular formula C6H12O4, is a white crystalline powder. It is stable at room temperature, readily soluble in water, methanol, and acetone, and exhibits weak acidity. Due to its multiple functional groups, it possesses high reactivity. It is primarily used as a chain extender for water-based polyurethanes, a monomer for resin synthesis, a modifier for coatings and adhesives, and an intermediate in the fine chemicals industry.
| Item | Specification |
| Melting Point | 109–112 °C |
| Boiling Point | 360 °C (760 mmHg, predicted) |
| Density | 1.263 g/cm³ (20 °C) |
| Flash point | 185.7 °C |
| Vapor pressure | 1.24×10⁻⁶ mmHg at 25 °C |
| Refractive index | 1.499 |
| Solubility | Soluble in water (487 g/L, 20 °C), methanol, acetone. |
Waterborne polyurethane chain extender (core), non-toxic, no organic residue
Synthetic monomer for water-based polyester, epoxy resin, improves hydrophilicity
Modifier for water-based coatings/adhesives, enhances stability and adhesion
Crosslinking agent for hyperbranched polymers, drug carriers, nanomaterials
Fine chemical intermediate for chelating agents and surfactants
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