Viscosity of Diethanolamine at Various Temperatures

Triethanolamine is a viscous and very hygroscopic liquid with a slight ommoniacal odor. 

It bails at 244°C. at 50 mm. (360°C. at 760 mm.) and is entirely soluble in water and alcohols, but only slightly soluble in hydrocarbons. It is a mild, organic base which like ammonia combines with acids and acidic materials. The alkalinity of pure triethanolamine is somewhat less than that of ammonia, its pH being 11.2 in 25% solution. 

With free fatty acidS/ triethanolamine forms soaps in direct molecular proportions. Triethanolamine oleate is a semi-liquid soap capable of forming solutions of marked detergent properties in water or in organic solvents such as gasoline. In water, triethanolamine oleote Is soluble in all proportions in gasoline, more than 2% soap is necessary to effect solution. 

Viscous, pale yellow liquid intermediate in properties between alcohol and ammonia slightly ammoniacal odor excellent penetrating properties forms soaps with fatty acids hygroscopic. Commercial product contains 70-75% triethanolamine, 

Typical ipecifications Sp. gr. L.L240-1.L300 (20/20 C) water not more than 1.0% purity not more than 2.5% monoethanolamine, not more than 15% diethanolamine, not less than 80% triethanolamine equivalent wt. 140-145 color (SOO-mm. tube) not more than 7 yellow and 2 red Lovibond average wt./gal. 9.40 lbs. (20 C). 

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