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Trimethylamine

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Synonyms & Trade Names
N,N-Dimethylmethanamine, TMA [Trimethylamine] [Note: May be used in an aqueous solution (typically 25%, 30%, or 40% TMA.]
CAS No.
75-50-3
RTECS No.
PA0350000
DOT ID & Guide
1083 118(anhydrous)
1297 132(aqueous solution)
Formula
(CH₃)₃N
Conversion
1 ppm = 2.42 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 10 ppm (24 mg/m3) ST 15 ppm (36 mg/m3)
OSHA PEL
none See Appendix G
Measurement Methods
OSHA PV2060
See: NMAM or OSHA Methods
Physical Description
Colorless gas with a fishy, amine odor. [Note: A liquid below 37°F. Shipped as a liquefied compressed gas.]
Molecular Weight
59.1
Boiling Point
37°F
Freezing Point
-179°F
Solubility
(86°F): 48%
Vapor Pressure
(70°F): 1454 mmHg
Ionization Potential
7.82 eV
Flash Point
NA (Gas) 20°F (Liquid)
Upper Explosive Limit
11.6%
Lower Explosive Limit
2.0%
Relative Gas Density
2.09
Flammable Gas
Incompatibilities & Reactivities
Strong oxidizers (including bromine), ethylene oxide, nitrosating agents (e.g., sodium nitrite), mercury, strong acids [Note: Corrosive to many metals (e.g., zinc, brass, aluminum, copper).]
Exposure Routes
inhalation, ingestion (solution), skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat, respiratory system; cough, dyspnea (breathing difficulty), delayed pulmonary edema; blurred vision, corneal necrosis; skin burns; liquid: frostbite
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact (liquid/solution)/Frostbite
Eyes:Prevent eye contact (liquid/solution)/Frostbite
Wash skin:When contaminated (solution)
Remove:When wet (flammable)
Change:No recommendation
Provide:Eyewash (liquid/solution), Quick drench (liquid/solution), Frostbite wash
First Aid
(See procedures)
Eye:Irrigate immediately (liquid/solution)/Frostbite
Skin:Water flush immediately (liquid/solution)/Frostbite
Breathing:Respiratory support
Swallow:Medical attention immediately (solution)
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0206
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health