Name | 5-Sulfoisophthalic acid monosodium salt |
Synonyms | 5-PPISA 5-SULFOISOPHTHALIC ACID, NA 5-Sodiumsulfoiso-phthalicacid 5-SodiumsulfaBis-Isophthalate SODIUM 5-SULFAFE-3-PHTHALIC ACID 5-SULFOISOPHTHALIC ACID SODIUM SALT 5-sulfonatobenzene-1,3-dicarboxylate sodium 3,5-dicarboxybenzenesulfonate 5-Sulfoisophtalic Acid Monosodium Salt 5-SULFOISOPHTHALIC ACID MONOSODIUM SALT 5-Sulfoisophthalic acid monosodium salt SODIUM 5-SULFO-1,3-BENZENEDICARBOXYLATE kyselina3,5-dikarboxybenzensulfonovasodny 3,5-dicarboxybenzenesulfonic acid sodium salt 3,5-DICARBOXYBENZENESULFONIC ACID SODIUM SALT |
CAS | 6362-79-4 |
EINECS | 228-845-2 |
InChI | InChI=1/C8H6O7S/c9-7(10)4-1-5(8(11)12)3-6(2-4)16(13,14)15/h1-3H,(H,9,10)(H,11,12)(H,13,14,15)/p-3 |
InChIKey | YXTFRJVQOWZDPP-UHFFFAOYSA-M |
Molecular Formula | C8H5NaO7S |
Molar Mass | 268.18 |
Density | 1.87[at 20℃] |
Melting Point | 373 °C |
Water Solubility | 380 g/L |
Appearance | White-like powder |
Color | White to Almost white |
BRN | 4170770 |
pKa | 4.1[at 20 ℃] |
Storage Condition | Sealed in dry,Room Temperature |
MDL | MFCD00007495 |
Physical and Chemical Properties | White powder. |
Use | Used as intermediates and modifiers for pharmaceuticals, pesticides, polyesters |
Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R34 - Causes burns |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S25 - Avoid contact with eyes. S24/25 - Avoid contact with skin and eyes. |
WGK Germany | 2 |
RTECS | DB6030000 |
TSCA | Yes |
HS Code | 29173990 |
LogP | -1.7 at 23℃ |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Overview | dimethyl isophthalate -5-sulfonic acid sodium salt (commonly known as trimer), mainly used for the synthesis of cationic dyeable polyester (CDP) the third monomer, the CDP polyester fiber has good affinity for cationic fuel, the CDP fiber can be dyed under normal pressure, the color is bright, the color is complete, the color fastness is high, and the color is not easy to fade, and has good antistatic property, moisture absorption, Pilling resistance and air permeability, comfortable to wear. However, the production method reported at present is to sulfonate isophthalic acid with different concentrations of fuming sulfuric acid or sulfur trioxide, and then synthesize the product by methanol esterification, soda ash or caustic soda neutralization, refining, however, the reaction caused by sulfur trioxide sulfonation is difficult to control, so that the isophthalic acid occurs coking, and the use of low concentration sulfuric acid sulfonation leads to excessive residual sulfuric acid and eventually produces a large amount of sodium sulfate, and the product is more by-product, the mother liquor (high concentration wastewater) produced in the neutralization process is directly discharged from the system, which is difficult to treat and causes pollution to the environment. |
Application | sodium isophthalate -5-sulfonate is a very important fine chemical products, mainly used as pharmaceuticals, pesticides, intermediates and modifiers for polyesters. |
preparation | , the 4-butanediol was placed in the desiccator and dried at 130 ℃ for 3H, and the purity of terephthalic acid was 85%;2) isophthalic acid and 60% fuming sulfuric acid were mixed in a weight ratio of 1:1, the sulfonation reaction is carried out at 140 ° C. For 10 hours, and isophthalic acid is reacted with SO3 in fuming sulfuric acid to obtain a sulfonation product; 3) the obtained reaction product is put into a polycondensation kettle, and the reaction temperature is controlled to 350 ° C, the polycondensation reaction was carried out under vacuum conditions for 2H; 4) The neutralized materials were centrifuged, the neutralized mother liquor was collected, and then the materials were washed with water and centrifuged to obtain crude dimethyl isophthalate -5-sodium sulfonate, and collect the mother liquor after washing with water; 5) then add 6 times of the weight of isophthalic acid to the crude dimethyl isophthalate -5-sulfonic acid sodium salt and heat up to 90 °c to dissolve, then cool down to 50 °c or less to crystallize, the crystallization mother liquor is collected once; The above Hot Melt crystallization step is then repeated once, and the secondary crystallization mother liquor is collected; Finally, the refined sodium dimethyl isophthalate -5-sulfonate after twice crystallization is dried to obtain a finished product.|
Use | polyester dyeing modifier for the production of modified polyester chips. used as intermediates and modifiers in pharmaceuticals, pesticides and polyesters |