1) It can be used as intermediate and modifier of medicine, pesticide and polyester

2) Polyester dyeing modifier is used to produce modified polyester chips.

3) Sodiumiso phthalic acid 5-sulfonate (5-ssipa) is usually used to prepare amine free waterborne polyester resin and waterborne polyurethane for various coatings. Generally, water soluble polyester resin with high acid value is obtained by reaction, and then neutralized by amine to obtain water soluble salt. The polyester resin synthesized by 5-ssipa is water-borne polyester, which is attributed to the ionic properties of sodium sulfonate group of 5-ssipa. The structure of aromatic dicarboxylic acid is similar to that of Eastman PIA(refined is ophthalic acid). The aromatic ring structure gives the coating excellent hardness and high gloss. The lithium ion compound similar to 5-ssipais a kind of monomer with higher polarity, which can give the resin stronger water solubility, so the addition amount is smaller. 5-ssipa is a monomer for the synthesis of polyester resin for food packaging adhesive, which has been approved by FDA..