HEXAMETHYL PHOSPHORAMIDE
Chemical Identification | |
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CAS # | 680-31-9 |
Formula |
C₆H₁₈N₃OP |
Synonyms |
hexamethylphosphoric acid triamide; hexamethylphosphorotriamide; HMPA; tris(dimethylamino)phosphine oxide; HEMPA; HMPT |
Physical Properties | |||
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Physical description | Clear, colorless to light amber liquid with an aromatic or mild, amine-like odor. | ||
Boiling point | 451°F | Molecular weight | 179.2 |
Freezing point/melting point | 43°F | Vapor pressure | 0.03 mmHg |
Flash point | 220°F | Vapor density | 6.18 |
Specific gravity | 1.024 | 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.) | ||||||
Sampling group | ||||||
Sampler/Sampling media | ||||||
Sampling time* | ||||||
Sampling volume (TWA)* | ||||||
Sampling flow rate (TWA)* |
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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 | ||||||
Method reference | ||||||
Notes |
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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 |
No TLV value [1990] |
PEL-TWA |
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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 |
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TLV-C |
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PEL-C |
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Skin notation |
NA |
Skin notation |
N |
Skin notation |
Y |
Skin notation |
NA |
Notes:
Not established |
Notes:
CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens. |
Notes:
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Notes:
Not established |
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Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: NTP-R,IARC-2B, NIOSH-Ca, TLV-A3 |
Notes:
Ca |
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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 - Hexamethylphosphoramide NIOSH: Pocket Guide to Chemical Hazards - Hexamethyl phosphoramide Literature References
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Last Updated Date : 01/28/2021