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| Tetrahydrofuran | CAS 109-99-9 | ||
| C4H8O | RTECS LU5950000 | ||
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Synonyms & Trade Names Diethylene oxide; 1,4-Epoxybutane; Tetramethylene oxide; THF |
DOT ID & Guide 2056 127 |
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Exposure Limits |
NIOSH REL: TWA 200 ppm (590 mg/m3) ST 250 ppm (735 mg/m3) | ||
| OSHA PEL�: TWA 200 ppm (590 mg/m3) | |||
| IDLH 2000 ppm [10%LEL] | Conversion 1 ppm = 2.95 mg/m3 | ||
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Physical Description Colorless liquid with an ether-like odor. |
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MW: 72.1 |
BP: 151°F |
FRZ: -163°F |
Sol: Miscible |
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VP: 132 mmHg |
IP: 9.45 eV |
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Sp.Gr: 0.89 |
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Fl.P: 6°F |
UEL: 11.8% |
LEL: 2% |
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| Class IB Flammable Liquid: Fl.P. below 73�F and BP at or above 100�F. | |||
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Incompatibilities & Reactivities Strong oxidizers, lithium-aluminum alloys [Note: Peroxides may accumulate upon prolonged storage in presence of air.] |
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Measurement Methods NIOSH 1609, 3800; OSHA 7 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush promptly Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH/OSHA Up to 2000 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode�/(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)�/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (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, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, upper respiratory system; nausea, dizziness, headache, central nervous system depression | |
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Target Organs
Eyes, respiratory system, central nervous system |
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| See also: INTRODUCTION |