Isophorone
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CAS
78-59-1
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C9H14O
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RTECS
GW7700000
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Synonyms & Trade Names
Isoacetophorone; 3,5,5-Trimethyl-2-cyclohexenone; 3,5,5-Trimethyl-2-cyclo-hexen-1-one
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DOT ID & Guide
1993 / 128 (combustible liquid, n.o.s.)
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Exposure
Limits
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NIOSH REL: TWA 4 ppm (23 mg/m3)
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OSHA PEL†: TWA 25 ppm (140 mg/m3)
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IDLH
200 ppm
See: 78591
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Conversion
1 ppm = 5.65 mg/m3
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Physical Description
Colorless to white liquid with a peppermint-like odor.
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MW: 138.2
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BP: 419°F
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FRZ: 17°F
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Sol: 1%
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VP: 0.3 mmHg
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IP: 9.07 eV
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Sp.Gr: 0.92
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Fl.P: 184°F
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UEL: 3.8%
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LEL: 0.8%
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Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
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Incompatibilities & Reactivities
Oxidizers, strong alkalis, amines
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Measurement Methods
NIOSH 2508, 2556; OSHA 7
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH
Up to 40 ppm:
(APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*
(APF = 10) Any supplied-air respirator*
Up to 100 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*
Up to 200 ppm:
(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 = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)*
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode*
(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
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, nose, throat; headache, nausea, dizziness, lassitude (weakness, exhaustion), malaise (vague feeling of discomfort), narcosis; dermatitis; in animals: kidney, liver damage
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Target Organs
Eyes, skin, respiratory system, central nervous system, liver, kidneys
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See also: INTRODUCTION
See ICSC CARD: 0169 See MEDICAL TESTS: 0123
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