Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options
CDC Home

Enter search terms separated by spaces.

Dimethylamine

Synonyms & Trade Names
Dimethylamine (anhydrous), N-Methylmethanamine
CAS No.
124-40-3
RTECS No.
IP8750000
DOT ID & Guide
1032 118 (anhydrous)
1160 132 (solution)
Formula
(CH3)2NH
Conversion
1 ppm = 1.85 mg/m3
IDLH
500 ppm
See: 124403
Exposure Limits
NIOSH REL
: TWA 10 ppm (18 mg/m3)
OSHA PEL
: TWA 10 ppm (18 mg/m3)
Measurement Methods

NIOSH 2010;
OSHA 34
See: NMAM or OSHA Methods
Physical Description
Colorless gas with an ammonia- or fish-like odor. [Note: A liquid below 44°F. Shipped as a liquefied compressed gas.]
MW:
45.1
BP:
44°F
FRZ:
-134°F		 Sol(140°F): 24%
VP:
1.7 atm
IP:
8.24 eV
Sp.Gr:
0.67 (Liquid at 44°F)
Fl.P:
NA (Gas) 20°F (Liquid)
UEL:
14.4%
LEL:
2.8%
RGasD:
1.56
Flammable Gas
Incompatibilities & Reactivities
Strong oxidizers, chlorine, mercury, acraldehyde, fluorides, maleic anhydride, aluminum, brass, copper, zinc
Exposure Routes
inhalation, skin and/or eye contact (liquid)
Symptoms
irritation nose, throat; sneezing, cough, dyspnea (breathing difficulty); pulmonary edema; conjunctivitis; dermatitis; liquid: frostbite
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact (liquid)/Frostbite
Eyes: Prevent eye contact (liquid)/Frostbite
Wash skin: When contaminated (liquid)
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash (liquid), Quick drench (liquid), Frostbite wash
First Aid
(See procedures)
Eye: Irrigate immediately (liquid)/Frostbite
Skin: Water flush immediately (liquid)/Frostbite
Breathing: Respiratory support
Respirator Recommendations

NIOSH/OSHA

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

Up to 500 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 canister providing protection against the compound of concern
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1485
 

Order NIOSH Publications

Contact Us:
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO