Hexamethylene Diisocyanate CAS#822-06-0
1. High Boiling Point: Boils between 255-261°C, making it suitable for high-temperature applications.
2. Low Water Solubility: Reacts slowly in aqueous solutions, useful for specialized chemical processes.
3. Stable Yet Moisture Sensitive: Stable under controlled conditions, but must be protected from moisture to avoid unwanted reactions.
4. Versatile Industrial Use: Important in coatings, adhesives, and sealants due to its reactivity and stability at high temperatures.
Hexamethylene diisocyanate (HDI) presents as a clear to light yellow liquid characterized by a distinct, pungent odor. This compound exhibits poor water solubility and reacts gradually in aqueous solutions. It possesses a relative density of ~1.05 at ambient temperature, with notable phase transition points: boiling between 255-261°C and freezing/melting at -67 to -55°C. Vapor pressure data shows saturation concentrations of 46 mg/m³ (20°C) and 137 mg/m³ (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 |
