Hexamethyl phosphoramide |
Synonyms & Trade Names Hexamethylphosphoric triamide, Hexamethylphosphorotriamide, HMPA, Tris(dimethylamino)phosphine oxide |
CAS No. 680-31-9 |
RTECS No. TD0875000 |
DOT ID & Guide |
Formula[(CH3)2N]3PO |
Conversion |
IDLH Ca [N.D.]
See: IDLH INDEX |
Exposure Limits NIOSH REL: Ca See Appendix A
OSHA PEL: none |
Measurement Methods
None available
See: NMAM or OSHA Methods |
Physical Description Clear, colorless liquid with an aromatic or mild, amine-like odor. [Note: A solid below 43°F.] |
MW: 179.2 |
BP: 451°F |
FRZ: 43°F |
Sol: Miscible |
VP: 0.03 mmHg |
IP: ? |
Sp.Gr: 1.03 |
Fl.P: 220°F |
UEL: ? |
LEL: ? |
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| Class IIIB Combustible Liquid: Fl.P. at or above 200°F. |
Incompatibilities & Reactivities Oxidizers, strong acids, chemically-active metals (e.g., potassium, sodium, magnesium, zinc) |
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] |
Target Organs Eyes, skin, respiratory system, central nervous system, gastrointestinal tract |
Cancer Site[in animals: cancer of the nasal cavity] |
Personal Protection/Sanitation (See protection codes)
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 |
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
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0162
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