Diethanolamine has a wide range of uses, mainly including the following aspects:

1. Chemical industry: As an acid gas absorbent, it is used for purification of coke gas and other industries, and can be recycled.
As a non-ionic surfactant, emulsifier, polish, lubricant, softener, etc.
As a raw material in organic synthesis, it participates in a variety of chemical reactions.

2. Daily chemical products: As a thickener and foam improver in shampoo and detergent to improve the cleaning effect of the product.
As an emulsifier and pH regulator in cosmetics, it helps the product mix better and remain stable.
3. Medical field: As a topical medication, it is used to treat certain skin diseases such as eczema and psoriasis, and relieves symptoms by inhibiting inflammatory reactions and skin cell proliferation.
As an intermediate or stabilizer, it plays an important role in drug synthesis.

4. Other fields: As an intermediate for the herbicide glyphosate.
As an important corrosion inhibitor, it can be used in boiler water treatment, automobile engine coolant, etc.
Used as a softener in synthetic fiber and leather production.
Used as a complexing agent for silver plating, cadmium plating, lead plating, zinc plating and other metals.

Diethanolamine Chemical Properties

Melting point 28 °C (lit.)
Boiling point 217 °C/150 mmHg (lit.)
density 1.097 g/mL at 25 °C (lit.)
vapor density 3.6 (vs air)
vapor pressure <0.98 atm ( 100 °C)
refractive index n20/D 1.477(lit.)
Fp 280 °F
storage temp. 2-8°C
solubility H2O: 1 M at 20 °C, clear, colorless
form Viscous Liquid or Low Melting Solid
color APHA: ≤15
Specific Gravity 1.09
Odor Mild ammoniacal; faint, fishy; characteristic.
PH 11.0-12.0 (25℃, 1M in H2O)
pka 8.88(at 25℃)
explosive limit 2.1-10.6%(V)
Water Solubility MISCIBLE
Sensitive Hygroscopic
λmax λ: 260 nm Amax: 0.04
λ: 280 nm Amax: 0.02
Merck 14,3107
BRN 605315
Exposure limits TLV-TWA 3 ppm (～13 mg/m3) (ACGIH).
Dielectric constant 2.8（25℃）
Stability: Stable. Incompatible with carbon dioxide, strong acids, strong oxidizing agents. Deliquescent.

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