Hexamethylene diisocyanate

Hexamethylene diisocyanate
Names
	Preferred IUPAC name 1,6-Diisocyanatohexane
	Other names HDI; 1,6-hexane diisocyanate
Identifiers
CAS Number	822-06-0 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:53578 ;
ChemSpider	12637 ;
ECHA InfoCard	100.011.350
IUPHAR/BPS	6291;
PubChem CID	13192;
UNII	0I70A3I1UF [CAS];
CompTox Dashboard (EPA)	DTXSID4024143 ;
	InChI InChI=1S/C8H12N2O2/c11-7-9-5-3-1-2-4-6-10-8-12/h1-6H2 Key: RRAMGCGOFNQTLD-UHFFFAOYSA-N ; InChI=1/C8H12N2O2/c11-7-9-5-3-1-2-4-6-10-8-12/h1-6H2 Key: RRAMGCGOFNQTLD-UHFFFAOYAI;
	SMILES O=C=N\CCCCCC/N=C=O;
Properties
Chemical formula	C8H12N2O2
Molar mass	168.2 g/mol
Appearance	Colourless liquid
Odor	sharp, pungent
Density	1.047 g/cm3, liquid
Melting point	−67 °C (−89 °F; 206 K)
Boiling point	255 °C (491 °F; 528 K)
Vapor pressure	0.05 mmHg (25 °C)
Viscosity	3 cP at 25 °C
Hazards
Flash point	130–140 °C (266–284 °F; 403–413 K) (Cleveland open cup)
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 0.005 ppm (0.035 mg/m3) C 0.020 ppm (0.140 mg/m3) [10-minute]
IDLH (Immediate danger)	N.D.
Related compounds
Related isocyanates	Isophorone diisocyanate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Hexamethylene diisocyanate (HDI) is the organic compound with the formula (CH₂)₆(NCO)₂. It is classified as an diisocyanate. It is a colorless liquid.^[2] It has sometimes been called HMDI^[3] but this not usually done to avoid confusion with Hydrogenated MDI.

^ ^a ^b ^c ^d ^e NIOSH Pocket Guide to Chemical Hazards. "#0320". National Institute for Occupational Safety and Health (NIOSH).
^ Christian Six; Frank Richter (2005). "Isocyanates, Organic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a14_611. ISBN 3-527-30673-0.
^ PubChem. "Hexamethylene diisocyanate". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-08-04.

[PGCH-1] NIOSH Pocket Guide to Chemical Hazards. "#0320". National Institute for Occupational Safety and Health (NIOSH).

[Ullmann-2] Christian Six; Frank Richter (2005). "Isocyanates, Organic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a14_611. ISBN 3-527-30673-0.

[3] PubChem. "Hexamethylene diisocyanate". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-08-04.

[1]

[2]

[3]

Names


Preferred IUPAC name 1,6-Diisocyanatohexane
Other names HDI 1,6-hexane diisocyanate
Identifiers
CAS Number	822-06-0^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:53578^Y
ChemSpider	12637^Y
ECHA InfoCard	100.011.350
IUPHAR/BPS	6291
PubChem CID	13192
UNII	0I70A3I1UF^Y[CAS]
CompTox Dashboard (EPA)	DTXSID4024143
InChI InChI=1S/C8H12N2O2/c11-7-9-5-3-1-2-4-6-10-8-12/h1-6H2^Y Key: RRAMGCGOFNQTLD-UHFFFAOYSA-N^Y InChI=1/C8H12N2O2/c11-7-9-5-3-1-2-4-6-10-8-12/h1-6H2 Key: RRAMGCGOFNQTLD-UHFFFAOYAI
SMILES O=C=N\CCCCCC/N=C=O
Properties
Chemical formula	C₈H₁₂N₂O₂
Molar mass	168.2 g/mol
Appearance	Colourless liquid
Odor	sharp, pungent^[1]
Density	1.047 g/cm³, liquid
Melting point	−67 °C (−89 °F; 206 K)
Boiling point	255 °C (491 °F; 528 K)
Vapor pressure	0.05 mmHg (25 °C)^[1]
Viscosity	3 cP at 25 °C
Hazards
Flash point	130–140 °C (266–284 °F; 403–413 K) (Cleveland open cup)
NIOSH (US health exposure limits):
PEL (Permissible)	none^[1]
REL (Recommended)	TWA 0.005 ppm (0.035 mg/m³) C 0.020 ppm (0.140 mg/m³) [10-minute]^[1]
IDLH (Immediate danger)	N.D.^[1]
Related compounds
Related isocyanates	Isophorone diisocyanate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references