TRANS-1,4-CYCLOHEXANE DIISOCYANATE

1.Trans-1,4-cyclohexane diisocyanate (English name: trans-1,4-Cyclohexane diisocyanate), chemical formula C8H10N2O2, molecular weight 166.18, CAS number 7517-76-2. This substance is a white solid with a density of 1.1162 g/mL (25°C), melting point of 59–62°C, and boiling point of 145–146°C (32 mmHg). It is insoluble in water and must be stored sealed in a cool, dry environment.

2.This substance reacts with hydroxyl groups, amino groups, and water to form polyurethane or polyurea. Acute inhalation toxicity tests indicate that a dose of 90 mg/m³/4H causes drowsiness, pulmonary edema, and respiratory distress in rodents. It poses potential hazards to aquatic environments. Synthesis methods include the phosgenation route (using hydrogenated para-phenylenediamine as feedstock) and the non-phosgenation route (involving cyanation-chlorination-ammonolysis-thermal decomposition of cyclohexanedicarboxylate). Primary applications include manufacturing light-stable polyurethane coatings, synthetic fibers, and polyurea elastomers.