USE
N,N-dihydroxyethyl-p-methylaniline is a widely used organic intermediate for dyes, medicines and pesticides. The ester group on the terminal amino group gives this type of dye more excellent properties. Since its preparation, it has It has always occupied a certain market. At present, the domestic demand is huge, and there is still a certain market potential abroad. Studying its synthesis and technology has great economic and practical significance.

Synthesis method
N,N-dihydroxyethyl-p-methylaniline can be synthesized by the following steps: add 1000g p-methylaniline and 10g water into a 5L pressure kettle, raise the Chemicalbook temperature to 60℃~65℃, stir for 30 minutes, and add ethylene oxide Add 100g of alkane and keep the temperature at 65-70°C for 4 hours. Then add 100g of ethylene oxide within 4 hours, keep the temperature at 70-75°C, react at 70-80°C for 3 hours after passing through, and cool to 30°C. Add the reaction solution to the distillation kettle and collect the product at 143~148°C (1.3~1.6kPa). The yield is 86% and the product purity is greater than 98%. The front fraction can be recycled to increase the yield. The product is a light yellow solid.

2,2′-(P-TOLYLIMINO)DIETHANOL Chemical Properties
Melting point 49-53 °C (lit.)
Boiling point 338-340 °C (lit.)
density 1.0654 (rough estimate)
vapor pressure 0Pa at 25℃
refractive index 1.5330 (estimate)
Fp >230 °F
storage temp. Inert atmosphere,Room Temperature
solubility soluble in Methanol
form powder to lump to clear liquid
pka 14.33±0.10(Predicted)
color White or Colorles to Yellow to Orange
Water Solubility 19.8g/L at 20℃
BRN 2099156
InChIKey JUVSRZCUMWZBFK-UHFFFAOYSA-N
LogP 2 at 35℃
CAS DataBase Reference 3077-12-1(CAS DataBase Reference)
EPA Substance Registry System Ethanol, 2,2′-[(4-methylphenyl)imino]bis- (3077-12-1)

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