HEXAMETHYLENE DIISOCYANATE
CAS # | 822-06-0 |
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Formula |
C₈H₁₂N₂O₂ |
Synonyms |
1,6-diisocyanatohexane, HDI, hexamethylene-1,6-diisocyanate, 1,6-hexamethylene diisocyanate |
Physical description | Clear, colorless to slightly yellow liquid with a sharp, pungent odor. | ||
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Boiling point | 415°F | Molecular weight | 168.2 |
Freezing point/melting point | -89°F | Vapor pressure | 0.5 mmHg |
Flash point | 284°F | Vapor density | |
Specific gravity | 1.0528 | Ionization potential | |
Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
NFPA health rating | NFPA fire rating | ||
NFPA reactivity rating | NFPA special instruction | ||
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Analyte code (IMIS no.) | 1377 | ||
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Sampling group | |||
Sampler/Sampling media | Isocyanate Sampling Filter Kit - GFF (37 mm, open-faced) coated with 1 mg 1-(2-pyridyl)piperazine [SLTC103] | ||
Sampling time* | 15 min |
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Sampling volume (TWA)* |
15 L |
||
Sampling flow rate (TWA)* |
1 L/min |
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Sampling volume (STEL/Peak/C)* | |||
Sampling flow rate (STEL/Peak/C)* | |||
Analytical method instruments | UHPLC | ||
Method reference | OSHA 5002 (fully validated) | ||
Notes |
Results may not reflect accurate exposures to the polymeric forms of isocyanates. Refrigerate coated filtersuntil used. Sample open-faced!! |
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Special requirements |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
Wipe Sampler/Sampling media | |
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Bulk Method |
Device | Hazard Assessment Test Kit for Aliphatic Isocyanates | ||||
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Model/Type | 769-1003 | ||||
Sampling information (see manufacturer instructions) |
Isocyanate Surface and Dermal Sampling, Hazard Assessment Test Kit for Aliphatic Isocyanates |
OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
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PEL-TWA | REL-TWA |
0.005 ppm (0.035 mg/m³) |
TLV-TWA |
0.005 ppm [1985] |
PEL-TWA |
0.005 ppm (0.034 mg/m³) |
|
PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
PEL-C | REL-C |
0.020 ppm (0.140 mg/m³) [10 minutes] |
TLV-C | PEL-C | |||
Skin notation |
NA |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes:
Not established |
Notes: | Notes: | Notes: | ||||
Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: Not listed | Notes: | ||||||
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: |
Additional Resources and Literature References
NOAA: CAMEO Chemicals - Hexamethylene diisocyanate NIOSH: Pocket Guide to Chemical Hazards - Hexamethylene diisocyanate Literature References
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Last Updated Date : 04/02/2025