Tags: Chemical Compound, Chemical Substance.
Hexamethylene diisocyanate (HDI) is an organic compound in the class known as isocyanates. More specifically it is an aliphatic diisocyanate. It is produced in relatively small quantities accounting for (with isophorone diisocyanate) only 3.4% of the global diisocyanate market in the year 2000. Aliphatic diisocyanates are used in special applications such as enamel coatings which are resistant to abrasion and degradation from ultraviolet light.