Ketene
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CAS
463-51-4
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CH2=CO
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RTECS
OA7700000
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Synonyms & Trade Names
Carbomethene, Ethenone, Keto-ethylene
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 0.5 ppm (0.9 mg/m3) ST 1.5 ppm (3 mg/m3)
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OSHA PEL†: TWA 0.5 ppm (0.9 mg/m3)
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IDLH
5 ppm
See: 463514
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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
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BP: -69°F
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FRZ: -238°F
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Sol: Reacts
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VP: >1 atm
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IP: 9.61 eV
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RGasD: 1.45
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Fl.P: NA (Gas)
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UEL: ?
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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)
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
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
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Exposure Routes
inhalation, skin and/or eye contact
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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
See ICSC CARD: 0812 See MEDICAL TESTS: 0126
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