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| Ketene | CAS 463-51-4 | ||
| CH2=CO | RTECS OA7700000 | ||
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Synonyms & Trade Names Carbomethene, Ethenone, Keto-ethylene |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: TWA 0.5 ppm (0.9 mg/m3) ST 1.5 ppm (3 mg/m3) | ||
| OSHA PEL�: TWA 0.5 ppm (0.9 mg/m3) | |||
| IDLH 5 ppm | Conversion 1 ppm = 1.72 mg/m3 | ||
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Physical Description Colorless gas with a penetrating odor. |
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MW: 42.0 |
BP: -69°F |
FRZ: -238°F |
Sol: Reacts |
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VP: >1 atm |
IP: 9.61 eV |
RGasD: 1.45 |
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Fl.P: NA (Gas) |
UEL: ? |
LEL: ? |
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| Flammable Gas | |||
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Incompatibilities & Reactivities Water, alcohols, ammonia [Note: Readily polymerizes. Reacts with water to form acetic acid.] |
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Measurement Methods NIOSH S92 (II-2) |
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Personal Protection & Sanitation Skin: No recommendation Eyes: No recommendation Wash skin: No recommendation Remove: No recommendation Change: No recommendation |
First Aid (See procedures) Breathing: Respiratory support |
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Respirator Recommendations
NIOSH/OSHA Up to 5 ppm: (APF = 10) Any supplied-air respirator*/(APF = 50) Any self-contained breathing apparatus 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, skin and/or eye contact | |
| Symptoms Irritation eyes, skin, nose, throat, respiratory system; pulmonary edema | |
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Target Organs
Eyes, skin, respiratory system |
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| See also: INTRODUCTION |