METHYLENE BIS(4-CYCLOHEXYLISOCYANATE)
Chemical Identification | |
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CAS # | 5124-30-1 |
Formula |
C₁₅H₂₂N₂O₂ |
Synonyms |
dicyclohexylmethane 4,4'-diisocyanate; DMDI; bis(4-isocyanatocyclohexyl)methane; HMDI; hydrogenated MDI; reduced MDI; saturated MDI; 1,1-methylene bis(4-isocyanatocyclohexane) |
Physical Properties | |||
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Physical description | Clear, colorless to light-yellow liquid. | ||
Boiling point | Molecular weight | 262.4 | |
Freezing point/melting point | <14°F | Vapor pressure | 0.001 mmHg at 77°F |
Flash point | >395°F | Vapor density | |
Specific gravity | 1.07 at 77°F | 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 |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | 2651 | |||||
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 |
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Sampling flow rate (TWA)* | 1 L/min |
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Sampling volume (STEL/Peak/C)* |
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Sampling flow rate (STEL/Peak/C)* |
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Analytical method instruments | UHPLC | |||||
Method reference | OSHA 5002 (fully validated) | |||||
Notes | Refrigerate coated filters until used. Sample open-faced!! |
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Special requirements |
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* 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 Method | |
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Sampler/Sampling media |
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Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | ||||||
Model/Type | ||||||
Sampling information (see manufacturer instructions) |
Exposure Limits | |||||||
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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 |
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REL-TWA |
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TLV-TWA |
0.005 ppm [1985] |
PEL-TWA |
0.005 ppm (0.054 mg/m³) |
PEL-STEL |
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REL-STEL |
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TLV-STEL |
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PEL-STEL |
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PEL-C |
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REL-C |
0.01 ppm (0.11 mg/m³) |
TLV-C |
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PEL-C |
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Skin notation |
NA |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes:
Not established |
Notes:
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Notes:
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Notes:
See also Section 5198. |
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Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: Not listed |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
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Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - 1,1-Methylene bis(4-isocyanatocyclohexane) NIOSH: Pocket Guide to Chemical Hazards - Methylene bis(4-cyclohexylisocyanate) Literature References
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Last Updated Date : 04/14/2021