1. Chemical Identity
Product Name: Dimethyl-5-Sulfoisophthalate Sodium Salt (SIPM)
CAS number: 3965-55-7
EC number: 223-578-8
Molecular formula: C10H9O7SNa
Molecular weight： 296.23
2. General introduction
SIPM is widely used as the third monomer of cationic dyeable polyester (CDP), while CDP is a kind of modified Dacron. Dacron, chemical name polyethylene terephthalate (PET), is a kind of polyester fiber. Dacron fabrics are very popular in the market because of they are beautiful and easy to wash and dry. However, non-modified Dacron is difficult to dye because of its high crystallization, high orientability and non polar group.
CDP as a kind of modified Dacron is produced by introducing a third monomer SIPM. Since there is sulfonic group in CDP, it has good affinity performance to cationic dyes. So it’s more easily to dye and the dyed fibers have a bright and lasting color. CDP is easy for wool blend, so it is suitable for winter men and women clothing fabrics.
Properties of SIPM:
● Good affinity performance to cationic dyes
● Super dyeability
White powder without impurity
Color (16% EG) Pt-Co
Acid Value (mg KOH/g)
Saponification Value (mg KOH/g)
Volatile Matter, %
4. Packing, transportation and storage
25Kg net in paper-plastic bag; Available in Supersack.
This material is non- dangerous goods for land, air and marine transportation.
They should be kept away from flames or other sources of heat. They should be stored in cool and ventilated area.