Appearance: Light yellow to yellow viscous liquid with an amine - like odor
Density: Approximately 1.029 g/cm³
Melting Point: - 28℃
Boiling Point: 238 - 240℃
Flash Point: 125℃ (closed - cup)
Solubility: Miscible with water and ethanol, easily hygroscopic, can absorb carbon dioxide and water from the air, and has good compatibility with epoxy resin. Slightly soluble in ether.
Chemical Properties
Hydroxyethyl ethylenediamine is an organic base compound. Its molecule contains both active amino and hydroxyl groups, which have strong polarity. Its chemical properties are similar to those of ethylenediamine, and it also has the chemical properties of common alcohols. It is multifunctional and can react with inorganic acids, organic acids, and a variety of organic compounds to form salts, undergo ammonolysis, esterification, and condensation reactions, generating a variety of derivative products.
Production Method
The most commonly used method is the ethylene oxide method, in which hydroxyethyl ethylenediamine is obtained by the condensation of ethylenediamine and ethylene oxide in the presence of potassium hydroxide. This method allows the direct contact reaction with the amine without the need for additives. The process flow is short, and the operation is simple. The crude product is easy to purify. However, ethylene oxide is a flammable and explosive gas, so there are certain risks in use, and the side - reaction will produce dihydroxyethyl ethylenediamine.
Uses
Epoxy Resin Curing Agent: It has the characteristics of low toxicity and room - temperature curing. When used in combination with epoxy resin, it is widely used for bonding various metal and non - metal components, preparing anti - corrosion epoxy coatings, casting cable joints, and other mechanical and electrical parts.
Surfactant Raw Material: It can be used to produce various amphoteric imidazoline surfactants for shampoos, bath lotions, and personal and industrial cleaners. It can also produce cationic imidazoline surfactants with good anti - corrosion and anti - rust effects.
Other Fields: It can be used as a raw material for the production of light stabilizers and vulcanization accelerators in the paint and coating industry, a metal ion chelating agent, a lubricant additive, a paper sizing agent, etc. It is also the side - chain of the anti - cancer drug mitoxantrone.
Toxicity
It is of low toxicity. The oral LD?? for rabbits is 3000 mg/kg, and the dermal LD?? for rabbits is > 2000 mg/kg. Its toxicity is 6 - 7 times lower than that of ethylenediamine. Under the same conditions, the possibility of being poisoned by inhaling its vapor into the air through the respiratory tract is 3500 times smaller than that of ethylenediamine, and its irritation to the skin and conjunctiva is also much smaller than that of ethylenediamine.