Diacetone alcohol
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CAS
123-42-2
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CH3COCH2C(CH3)2OH
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RTECS
SA9100000
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Synonyms & Trade Names
Diacetone, 4-Hydroxy-4-methyl-2-pentanone, 2-Methyl-2-pentanol-4-one
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DOT ID & Guide
1148 129
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Exposure
Limits
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NIOSH REL: TWA 50 ppm (240 mg/m3)
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OSHA PEL: TWA 50 ppm (240 mg/m3)
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IDLH
1800 ppm [10%LEL]
See: 123422
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Conversion
1 ppm = 4.75 mg/m3
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Physical Description
Colorless liquid with a faint, minty odor.
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MW: 116.2
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BP: 334°F
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FRZ: -47°F
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Sol: Miscible
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VP: 1 mmHg
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IP: ?
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Sp.Gr: 0.94
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Fl.P: 125°F
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UEL: 6.9%
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LEL: 1.8%
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Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
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Incompatibilities & Reactivities
Strong oxidizers, strong alkalis
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Measurement Methods
NIOSH 1402, 1405; OSHA 7
See: NMAM or OSHA Methods
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Personal Protection & Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
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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 1250 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 1800 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 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, skin, nose, throat; corneal damage; in animals: narcosis, liver damage
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Target Organs
Eyes, skin, respiratory system, central nervous system, liver
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See also: INTRODUCTION
See ICSC CARD: 0647
See MEDICAL TESTS: 0067
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