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| Hexamethyl phosphoramide | CAS 680-31-9 | ||
| [(CH3)2N]3PO | RTECS TD0875000 | ||
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Synonyms & Trade Names Hexamethylphosphoric triamide, Hexamethylphosphorotriamide, HMPA, Tris(dimethylamino)phosphine oxide |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: Ca See Appendix A | ||
| OSHA PEL: none | |||
| IDLH Ca [N.D.] | Conversion | ||
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Physical Description Clear, colorless liquid with an aromatic or mild, amine-like odor. [Note: A solid below 43°F.] |
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MW: 179.2 |
BP: 451°F |
FRZ: 43°F |
Sol: Miscible |
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VP: 0.03 mmHg |
IP: ? |
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Sp.Gr: 1.03 |
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Fl.P: 220°F |
UEL: ? |
LEL: ? |
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| Class IIIB Combustible Liquid: Fl.P. at or above 200�F. | |||
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Incompatibilities & Reactivities Oxidizers, strong acids, chemically-active metals (e.g., potassium, sodium, magnesium, zinc) |
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Measurement Methods None available |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure- demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, skin, respiratory system; dyspnea (breathing difficulty); abdominal pain; [potential occupational carcinogen] | |
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Target Organs
Eyes, skin, respiratory system, central nervous system, gastrointestinal tract Cancer Site [in animals: cancer of the nasal cavity] |
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| See also: INTRODUCTION |