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Guar gum hydroxypropyl trimethylammonium chloride (also known as cationic guar gum) is a cationic polysaccharide polymer produced by etherification modification of natural guar gum (through reaction with 3-chloro-2-hydroxypropyl trimethylammonium chloride). Its main molecular chain consists of a mannose-galactose polysaccharide structure, while the introduction of quaternary ammonium groups into the side chains confers cationic properties. Combining the biocompatibility of natural polysaccharides with the surface activity of cationic polymers, it serves as a key functional ingredient in personal care, textiles, and papermaking industries.
| Item | Specification |
| Melting point | >300 °C (lit.) |
| Boiling Point | N/A |
| Density | 1.3 g/mL at 25 °C (lit.) |
| Flash Point | 135.6 °C |
| Viscosity | 1% aqueous solution viscosity range 3000–6000 mPa·s (25 °C, 2 hours). |
| Odor | Slightly amine-like |
| Solubility | Easily soluble in water (best under neutral or alkaline conditions); insoluble in organic solvents. |
| Nitrogen content | ~1.2–2.2% (indicates degree of cationization) |
| Stability | Stable in dry form; aqueous solutions are pH-sensitive, with optimal performance at pH 6–8; avoid high-temperature and humid environments. |
| Surface Properties | Cationic charge density 0.4–2.0 meq/g; exhibits good adsorption and conditioning properties. |
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