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1,6-Hexamethylene diisocyanate (HDI)

1,6-Hexamethylene diisocyanate (HDI)
CAS No.: 822-06-0
Molecular Formula: C8H12N2O2
Molecular Weight:168.19308
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Product Introduction

1,6-Hexamethylene diisocyanate (HDI) is an important chemical raw material; it is a colorless to pale yellow, transparent liquid at room temperature with a strong, pungent odor, and is primarily used in the production of high-performance polyurethane materials.


CHEMICAL PROPERTIES

English Name1,6‑diisocyanatohexane; hexamethylene diisocyanate (HDI)
AliasHexamethylene diisocyanate
Chemical FormulaC8H12N2O2
Molecular Weight168.19
CAS No.822‑06‑0
EINECS No.212‑485‑8
Melting Point-67 ℃
Boiling Point269 ℃
Water SolubilityInsoluble in cold water, soluble in benzene, toluene, chlorobenzene and other organic solvents
Density1.047 g/cm³
AppearanceColorless to pale‑yellow transparent liquid with strong pungent odor
Flash Point130‑140 ℃
ApplicationManufacture of polyurethane coatings, elastomers, adhesives, textile finishing agents, etc.
Safety PhrasesS26; S28; S38; S45
Hazard SymbolT (Toxic)
Risk PhrasesR23; R36/37/38; R42/43
UN No.2281
CN Hazard No.61111
MDLMFCD00002047
RTECSMO1740000
BRN956709
PubChem24893386
Refractive Index1.451‑1.453
Octanol‑Water Partition Coefficient1.2184
Viscosity25 mPa.s
Decomposition Temperature255℃


PRODUCT USAGE

Coating Curing Agents: Derivatives of HDI, such as trimers and biurets, serve as key curing agents for high-end polyurethane coatings, yielding coatings with excellent resistance to yellowing, weathering, and solvents.

Adhesive Cross-linking Agents: Used in the production of high-performance polyurethane adhesives suitable for the aerospace, automotive, and construction sectors.

Other Applications: Also used as finishing and coating agents in the leather and textile industries, as well as binders in composite propellants.

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