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Dimethyl acetamide

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Synonyms & Trade Names
N,N-Dimethyl acetamide, DMAC
CAS No.
127-19-5
RTECS No.
AB7700000
DOT ID & Guide
Formula
CH₃CON(CH₃)₂
Conversion
1 ppm = 3.56 mg/m3
IDLH
300 ppm
See: 127195
Exposure Limits
NIOSH REL
TWA 10 ppm (35 mg/m3) [skin]
OSHA PEL
TWA 10 ppm (35 mg/m3) [skin]
Measurement Methods
NIOSH 2004
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a weak, ammonia- or fish-like odor.
Molecular Weight
87.1
Boiling Point
329°F
Freezing Point
-4°F
Solubility
Miscible
Vapor Pressure
2 mmHg
Ionization Potential
8.81 eV
Specific Gravity
0.94
Flash Point
(oc) 158°F
Upper Explosive Limit
(320°F): 11.5%
Lower Explosive Limit
(212°F): 1.8%
Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
Incompatibilities & Reactivities
Carbon tetrachloride, other halogenated compounds when in contact with iron, oxidizers
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation skin; jaundice, liver damage; depression, drowsiness, hallucinations, delusions
Target Organs
Skin, liver, central nervous system
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
Provide:Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 100 ppm:
(APF = 10) Any supplied-air respirator

Up to 250 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode

Up to 300 ppm:
(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: 0259   MEDICAL TESTS: 0080
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health