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Lignin (CAS: 9005-53-2) is a three-dimensional, cross-linked, amorphous polymer formed by the radical polymerization of three phenylpropane monomers—pinene, mustard alcohol, and p-coumarol—with the molecular formula (C₉H₁₀O₃)ₙ.
Lignin appears as a brown to black solid powder. It is hydrophilic and chemically reactive, and can be modified for a wide range of applications.
| Item | Specification |
| Melting Point | 250-350°C |
| Boiling Point | N/A |
| Density | N/A |
| Flash point | N/A |
| Tg | 120-170°C |
| Solubility | DMSO: ≥50 mg/mL; Water: slightly soluble |
Construction and Building Materials: Used as a water-reducing agent for concrete and an asphalt modifier; used in the production of eco-friendly wood adhesives and lightweight thermal insulation materials.
Industrial Chemicals: Dispersing agents for dyes, pesticides, and water-coal slurry; corrosion and scale inhibitors for industrial recirculating water systems; upon depolymerization, it can be used to produce fine chemical raw materials such as vanillin and phenols.
Agriculture and Environmental Protection: Soil conditioners and controlled-release fertilizer carriers; pesticide adjuvants; capable of adsorbing heavy metals and dye pollutants from wastewater.
New Materials and Energy: Blended with plastics and rubber to produce bio-based composites; used as a carbon fiber precursor; used to produce biochar, biomass fuels, and biodegradable packaging materials.
Pharmaceuticals and Personal Care: Slow-release carriers for drugs; raw materials for antioxidants and UV protection in cosmetics; used in products related to antimicrobial dressings.
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