Name: 2,5-thiophene dicarboxylic acid

English name: 2,5-Thiophenedicarboxylic acid

Chemical formula: CH4O4S

Molecular weight: 172.16

CAS Registry Number: 4282-31-9

EINECS accession number: 224-284-2

Appearance and properties: white to light yellow crystal powder

Density: 1.655 g/cm3

Melting point: >300 °C(lit.)

Boiling point: 444.6ºCat 760 mmHg

Flash point: 222.7ºC

use

Condensation of this product with o-aminophenol can produce fluorescent whitening agent EBF. This brightener can be used for nylon, polyester, polypropylene, chlorinated and triacetate fibers, and is a product with excellent performance. Mainly used in the preparation of optical brighteners, mainly used in the whitening of synthetic fibers, EVA, PVC, plastics and rubber, and can be used in the whitening of plastic films, compression molding materials, and injection molding materials.