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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.]
Molecular Weight
45.1
Boiling Point
44°F
Freezing Point
-134°F
Solubility
(140°F): 24%
Vapor Pressure
1.7 atm
Ionization Potential
8.24 eV
Specific Gravity
0.67 (Liquid at 44°F)
Flash Point
NA (Gas) 20°F (Liquid)
Upper Exposive Limit
14.4%
Lower Explosive Limit
2.8%
Relative Gas Density
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   ICSC CARD: 1485

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