2,4,4-Trimethylhexamethylene diisocyanate; Hexane, 1,6-diisocyanato-2,4,4-trimethyl-; 2,4,4-Trimethyl-1,6-diisocyanatohexane
CAS: 15646-96-5
Category: Organic Intermediates
| Purity | Industrial Grade ≥98%; Polyurethane Grade ≥99%; High Purity Grade ≥99.5% |
| Molecular Formula | C11H18N2O2 |
| Molecular Weight | 210.28 |
| Appearance | Colorless to pale yellow transparent liquid with mild characteristic odor; moisture-sensitive |
| Packaging | 200 kg galvanized steel drums, 250 kg HDPE drums, or nitrogen-sealed containers for industrial applications; 1 kg-25 kg sealed containers for laboratory and specialty use |
| Testing Indicators | Appearance — Visual inspection; Color — APHA color measurement; Purity — GC-FID or GC-MS analysis; Identification — FTIR spectroscopy (NCO characteristic absorption around 2250-2270 cm⁻¹); Isocyanate content — Dibutylamine back titration method (ASTM D2572); Moisture content — Karl Fischer titration (ASTM E203); Density — ASTM D4052; Viscosity — ASTM D445; Refractive index — ASTM D1218. |
| Storage Notes | Store in a cool, dry, well-ventilated area away from moisture, heat, and direct sunlight. Keep containers tightly closed under dry nitrogen atmosphere when possible. Protect from water, alcohols, amines, acids, and bases. Storage temperature should generally be maintained below 30°C. |
| Lead Time | 10 days |
2,4,4-Trimethylhexamethylene diisocyanate (TMDI) is an aliphatic diisocyanate intermediate mainly used in the manufacture of polyurethane coatings, elastomers, adhesives, sealants, and high-performance polymer materials. It provides improved weather resistance, UV stability, flexibility, and chemical resistance compared with aromatic diisocyanates. It is also used as a crosslinking component for polyurethane resins and specialty coatings.