Hexamethylene Diisocyanate
Elevated Boiling Characteristics: This compound typically boils within the temperature range of 255-261°C, supporting its utilization in elevated-temperature processing environments.
Controlled Aqueous Reactivity: The substance demonstrates limited water solubility with controlled hydrolysis characteristics, enabling specialized applications in aqueous-chemical systems.
Conditional Stability Profile: While maintaining stability under regulated conditions, the material requires protection from atmospheric moisture to prevent undesirable chemical transformations.
Industrial Implementation: Its combination of thermal resilience and selective reactivity establishes utility in coating formulations, adhesive systems, and sealant applications where high-temperature performance is required.
Hexamethylene diisocyanate (HDI) typically appears as a transparent to pale yellow liquid with a characteristically sharp odor. The compound demonstrates limited aqueous solubility and displays gradual hydrolytic reactivity in water-based systems. Its physical parameters include a relative density of approximately 1.05 at room temperature, with phase transition temperatures spanning -67 to -55°C (melting) and 255-261°C (boiling). Saturation vapor concentrations measure 46 mg/m³ at 20°C and 137 mg/m³ at 30°C.
Parameters
Melting point | -55°C |
Boiling point | 82-85 °C/0.1 mmHg |
density | 1.047 g/mL at 20 °C (lit.) 1.047 g/mL at 20 °C |
vapor pressure | 0.05 mm Hg ( 25 °C) |
refractive index | n20/D 1.453 |
Fp | 248 °F |
storage temp. | Store below +30°C. |
form | Liquid |
Specific Gravity | 1.05 |
color | Clear colorless to slightly yellow |
explosive limit | 0.9-9.5%(V) |
Water Solubility | Reacts |
Sensitive | Moisture Sensitive |
BRN | 956709 |
Exposure limits | TLV-TWA 0.0343 mg/m3 (0.005 ppm) (ACGIH). |
Stability: | Stable. Moisture sensitive. Combustible. Incompatible with strong oxidizing agents, strong bases, amines, acids. May react explosively with alcohols in the presence of base without a diluting solvent. Heating above 200 C may cause polymerization. |
InChIKey | RRAMGCGOFNQTLD-UHFFFAOYSA-N |
LogP | 3.2 at 20℃ |
CAS DataBase Reference | 822-06-0(CAS DataBase Reference) |
NIST Chemistry Reference | 1,6-Hexamethylene diisocyanate(822-06-0) |
EPA Substance Registry System | Hexamethylene-1,6-diisocyanate (822-06-0) |
Safety Information
Hazard Codes | T,T+,F |
Risk Statements | 23-36/37/38-42/43-41-34-26-22-39/23/24/25-23/24/25-11 |
Safety Statements | 26-28-38-45-28A-36/37/39-23-36/37-16-7 |
OEB | D |
OEL | TWA: 0.005 ppm (0.035 mg/m3), Ceiling: 0.020 ppm (0.140 mg/m3) [10-minute] |
RIDADR | UN 2281 6.1/PG 2 |
WGK Germany | 1 |
RTECS | MO1740000 |
F | 10-19-21 |
Autoignition Temperature | 454 °C |
TSCA | Yes |
HazardClass | 6.1 |
PackingGroup | II |
HS Code | 29291090 |
Hazardous Substances Data | 822-06-0(Hazardous Substances Data) |
Toxicity | LD50 orally in Rabbit: 746 mg/kg LD50 dermal Rabbit 570 mg/kg |
