DIMETHYL-5-SULFOISOPHTHALATE SODIUM SALT(SIPM,DMSIP) Synonyms: Dimethyl-5-Sulfoisophthalate Sodium Salt; 1,3 Benzene-Dicarboxylic Acid; 5 Sulfo-1,3-Dimethyl Ester Sodium Salt; DMS; SIPM; DMSIP. CAS Registry Number CAS RNo. is: 3965-55-7 Formula Chemical formula is: C10H9O7SNa Molecular Weight MW is: 296.24 g/mol. To be used for SIPM is mainly used to produce the dyed polyester chip. It is also used in water dispersible resin systems applied in coating and adhesives. It is acting as the third monomer of cation modified polyester (CDPET). It has a good affinity function with cation dyestuff because of the CDPET fiber containing sulfo group, the dyed fiber is bright and lustrous, having a complete range of color and dying deeply. The modified fiber has woolens feeling, it is easily blended with fleece that is necessary for garments manufacturing. GRADES A B Appearance White powder White powder Color (APHA, 16% EG, max) 20 20 Acid value (mg KOH/g, max) 0.4 0.6 Saponification value (mg KOH/g) 376 í- 381 375 í- 381 Sulphate (ppm, max) 100 300 Water content (wt%, max) 0.4 0.4 Iron (ppm, max) 4 5 Absorbance (max) 0.05 0.05. Packing DMSIP is packed in three-in-one kraft bags lined with plastic bags of 25kg net or in flexible container bags of 500 kg net each.
