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Dimethyl acetamide

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.
MW:
87.1
BP:
329°F
FRZ:
-4°F
Sol:
Miscible
VP:
2 mmHg
IP:
8.81 eV
Sp.Gr:
0.94		 Fl.P(oc): 158°F UEL(320°F): 11.5% LEL(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   See ICSC CARD: 0259   See MEDICAL TESTS: 0080
 

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