L-Lysine Diisocyanate

📚 1.Core properties

Reactivity: The molecular structure of this substance contains two isocyanate groups (-N=C=O), which is its most significant chemical property. These groups are extremely reactive and can rapidly react with compounds containing active hydrogens (such as polyols, water, amines, etc.).
Solubility: The solubility in water at 20-25°C is very low, approximately 0.19 g/L.
Optical activity: It exhibits optical activity, with a specific rotation of approximately -35° (in dioxane at a concentration of 1%).
Stability: Highly sensitive to moisture. When exposed to air, it will react with water.
Physical parameters: The calculated density is approximately 1.12 g/cm³ at 20°C, and the boiling point is approximately 305°C at 760 Torr.

🎯Main purpose

Synthetic biodegradable polyurethane: As a monomer, LDI can be used to synthesize polyurethane materials with good biocompatibility and biodegradability. It has significant research value in the biomedical fields such as tissue engineering scaffolds and drug sustained-release carriers.
Composite material interface modifier: Research has shown that LDI can significantly enhance the interface bonding performance of biobased composite materials such as polylactic acid/corn fiber (PLA/BF) and polybutylene succinate/corn fiber (PBC/BF), thereby improving their water resistance and tensile strength.
Organic synthesis intermediates: In the chemical industry, LDI can be used as a raw material or intermediate, and is applied in the production of pesticides, medicines, dyes, and surfactants.

📌Key points to note

Due to the similar health risks of LDI to common isocyanates, strict safety regulations must be followed when using it:
Hazard classification: Classified as Class 6.1 toxic substances, with the United Nations number UN 2206.
Main health hazards:
Inhalation toxicity: Inhalation may cause allergies, asthma symptoms or breathing difficulties.
Skin irritation/sensitization: Contact may cause skin irritation and allergic reactions.
Eye irritation: Contact may cause severe eye irritation.
Operation and Storage Requirements:
Operation: It should be carried out in a well-ventilated environment. Avoid inhaling its vapors or mist, and wear appropriate protective clothing, gloves and goggles.
Storage: It must be tightly sealed and stored at a temperature of 2-8°C in an inert gas environment (such as argon) to prevent deterioration due to reaction with moisture in the air.