Hexamethylene Diisocyanates (Polydiisocyanates)

Synonym

1,6-diisocyanatohexanehomopolymer, HMDI polymer, 1,6-diisocyanato-hexanhomopolymer, Hexamethylenediisocyanate,homopolymer

Date Added

09/06/2019

Air

Acute RELs

Acute REL (μg/m3):	4.5
Species:	Rodents
Acute REL Toxicologic Endpoint:	Respiratory system
Last Acute REL Revision:	09/06/2019
Acute Reference Exposure Levels Comments:	Notice of Adoption of Reference Exposure Levels for Hexamethylene Diisocyanate (Monomer and Polydiisocyanates)

8-Hour RELs

8-Hour Inhalation REL (μg/m3):	0.8
Last 8-Hour REL Revision:	09/06/2019
8-Hour Reference Exposure Levels Comments:	Notice of Adoption of Reference Exposure Levels for Hexamethylene Diisocyanate (Monomer and Polydiisocyanates)

Chronic REL

Chronic Inhalation REL (μg/m3):	0.4
Chronic Target Organs:	Respiratory system
Chronic Toxicologic Endpoint:	Pulmonary inflamation and fibrosis in rodents
Last Chronic REL Revision:	09/06/2019
Chronic Reference Exposure Levels Comments:	Notice of Adoption of Reference Exposure Levels for Hexamethylene Diisocyanate (Monomer and Polydiisocyanates)