HEXAMETHYLENE DIISOCYANATE BIURET
| CAS # | 4035-89-6 |
|---|---|
| Formula |
C₂₃H₃₈N₆O₅ |
| Synonyms |
HDIB; 1,6-hexamethylene diisocyanate biuret; HDI biuret; biuret of hexamethylenediisocyanate; Desmodur N, tris(6=isocyanatohexyl) biuret |
| Physical description | Thick liquid | ||
|---|---|---|---|
| Boiling point | Molecular weight | 478.6 | |
| Freezing point/melting point | -2.2°F | Vapor pressure | |
| Flash point | Vapor density | 1.114 | |
| Specific gravity | 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.) | D668 | ||
|---|---|---|---|
| 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 |
||
| Sampling volume (TWA)* | 15 L |
||
| Sampling flow rate (TWA)* | 1 L/min |
||
| 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 filters until used. Sample open-faced!! |
||
| 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 | |
|---|---|
| Bulk Method |
| Device | Hazard Assessment Test Kit for Aliphatic Isocyanates | ||||
|---|---|---|---|---|---|
| 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 |
|||||
|---|---|---|---|---|---|---|---|
| PEL-TWA | REL-TWA | TLV-TWA | PEL-TWA | ||||
| PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
| PEL-C | REL-C | TLV-C | PEL-C | ||||
| Skin notation |
NA |
Skin notation |
NA |
Skin notation |
NA |
Skin notation |
NA |
|
Notes:
Not established |
Notes:
Not established |
Notes:
Not established |
Notes:
Not established |
||||
| Health factors: See NIH-NLM PubChem. | IDLH | ||||||
| Carcinogenic classifications: | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Not listed NIOSH: Pocket Guide to Chemical Hazards - Not listed Literature References |
Last Updated Date : 04/02/2025