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Diacetone alcohol

Synonyms & Trade Names
Diacetone, 4-Hydroxy-4-methyl-2-pentanone, 2-Methyl-2-pentanol-4-one
CAS No.
123-42-2
RTECS No.
SA9100000
DOT ID & Guide
1148 129
Formula
CH3COCH2C(CH3)2OH
Conversion
1 ppm = 4.75 mg/m3
IDLH
1800 ppm [10%LEL]
See: 123422
Exposure Limits
NIOSH REL
TWA 50 ppm (240 mg/m3)
OSHA PEL
TWA 50 ppm (240 mg/m3)
Measurement Methods
NIOSH 1402 , 1405;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a faint, minty odor.
Molecular Weight
116.2
Boiling Point
334°F
Freezing Point
-47°F
Solubility
Miscible
Vapor Pressure
1 mmHg
Ionization Potential
?
Specific Gravity
0.94
Flash Point
125°F
Upper Exposive Limit
6.9%
Lower Explosive Limit
1.8%
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities
Strong oxidizers, strong alkalis
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; corneal damage; In Animals: narcosis, liver damage
Target Organs
Eyes, skin, respiratory system, central nervous system, liver
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
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
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

See also
INTRODUCTION   ICSC CARD: 0647   MEDICAL TESTS: 0067
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