Ketene |
Synonyms & Trade Names Carbomethene, Ethenone, Keto-ethylene |
CAS No. 463-51-4 |
RTECS No. OA7700000 |
DOT ID & Guide |
FormulaCH2=CO |
Conversion 1 ppm = 1.72 mg/m3 |
IDLH 5 ppm
See: 463514 |
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) |
Measurement Methods
NIOSH S92 (II-2)
See: NMAM or OSHA Methods |
Physical Description Colorless gas with a penetrating odor. |
MW: 42.0 |
BP: -69°F |
FRZ: -238°F |
Sol: Reacts |
VP: >1 atm |
IP: 9.61 eV |
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Fl.P: NA (Gas) |
UEL: ? |
LEL: ? |
RGasD: 1.45 |
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| Flammable Gas |
Incompatibilities & Reactivities Water, alcohols, ammonia [Note: Readily polymerizes. Reacts with water to form acetic acid.] |
Exposure Routes inhalation, skin and/or eye contact |
Symptoms irritation eyes, skin, nose, throat, respiratory system; pulmonary edema |
Target Organs Eyes, skin, respiratory system |
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Personal Protection/Sanitation (See protection codes)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
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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
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0812 See MEDICAL TESTS: 0126 |
