Typical Properties of Ethanolamines from Dow

The properties of the Dow family of ethanolamines enable these versatile materials to be utilized in a broad range of applications. Typical properties of the ethanolamines are shown in the table below.


Monoethanolamine Diethanolamine Triethanolamine
Formula
Molecular Weight
 H2NCH2CH2OH
61.08
 HN(CH2CH2OH)2
105.14
 N(CH2CH2OH)3
149.19
Apparent Sp. Gr. at 20/20°C
deltaSp. Gr./ delta at 10 to 80°C
 1.017
0.00080
 1.092(a)
0.00065(b)
1.126(f)
0.00059
Boiling Point at


760 mm Hg, °C
at 50 mm Hg, °C
at 10 mm Hg, °C
 170.4
101
71
 268(c)
182
150
 335(c)
245(c)
205
Vapor Pressure at 20°C, mm Hg <1 <0.01 <0.001
Freezing Point, °C(°F)
 10.5 (50.9) 28.0 (82.4) 21.6 (70.9)(e)
Absolute Viscosity at 20°C, cP 24.1 — 921(f)
at 30°C, cP
 16.2
 380
 404
Solubility at 20°C, % by wt
  
  
  
In Water
Water In
 Complete
Complete
 Complete(f)
—
 Complete(f)
Complete(f)
Solubility in organic Liquidsat 25°C, % by wt.
  
  
  
Acetone
Benzene
Carbon Tetrachloride
Ethyl Ether
Heptane
Methanol
 Complete
0.6
0.1
0.7
0.1
Complete
 Complete(f)
0.03
0.01
0.5
0.03
Complete(f)
 Complete
2
Complete
2
<0.03
Complete
Surface Tension, dynes/cm
  48.3(d)  48.5(g)  48.9(d)
Refractive Index, nD20 1.4539 1.4747(g) 1.4852(f)
ND/deltat at 20 to 40°C per °C
 0.00034
 0.00027(b)
0.00020
Flash Point, °C(°F) 96 (205)(h) 191 (375)(h) 208 (407)(h)

(a) At 30/20°C
(b) At 35 to 65°C
(c) Extrapolated (decomposes)
(d) At 25°C
(e) Supercools easily
(f) Supercooled liquid
(g) At 30°C
(h) Determined by ASTM Method D 93, using the Pensky-Martens Closed Cup

NOTE: These properties are typical of the product, but should not be confused with, or regarded as, sales specifications.


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