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OEM/ODM China 2 nitro para cresol - 2,5-Thiophenedicarboxylic Acid – Subang

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  • OEM/ODM China 2 nitro para cresol - 2,5-Thiophenedicarboxylic Acid – Subang

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OEM/ODM China 2 nitro para cresol - 2,5-Thiophenedicarboxylic Acid – Subang Detail:

Structural formula

2

Chemical name:2,5-Thiophenedicarboxylic Acid

Other names: OB acid; ob acid; ob acid; 5-thiophene dicarboxylic acid; 2,5-thiophene diacid; 2,5-dicarboxythiophene; 2,5-thiophene dicarboxylic acid; thiophene-2,5-dicarboxylic acid; 2,5-thiophene dicarboxylic acid; 2,5-thiophene dicarboxylic acid; 2,5-thiophene dicarboxylic acid

Molecular formula: C6H4O4S

molecular weight: 172.16

Numbering System

CAS:  4282-31-9

EINECS : 224-284-2

HS CODE: 2934999090

Physical Data

Appearance: white to light yellowish crystal powder

Purity: ≥98.0%

Density: 1.655 g/cm3

Melting point: >300 °C(lit.)

Boiling point: 444.6ºCat 760 mmHg

Flashing point: 222.7ºC

Solubility: slightly soluble in water

Production Method

Adipic acid and thionyl chloride were mixed in the weight ratio of 1: (6-10) and refluxed for 20-60 h in the presence of pyridine catalyst. The solvent was evaporated and the residue was heated at 140-160 ℃ for 3-7 H. Thiophene-2,5-dicarboxylic acid was obtained by sodium hydroxide treatment, acid precipitation, filtration, decolorization and purification.

Application

The fluorescent whitening agent EBF was prepared by condensation of the product with o-aminophenol. This brightener can be used for nylon, polyester, polypropylene, chloro and triacetic acid fibers. It is a product with excellent properties. It is mainly used in the preparation of fluorescent whitening agent, mainly used in the whitening of synthetic fiber, EVA, PVC, plastic and rubber, and can be used in the whitening of plastic film, compression molding materials, injection molding materials, etc

Storage

Sealed store in ventilated and dry place and keep away from light.

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OEM/ODM China 2 nitro para cresol - 2,5-Thiophenedicarboxylic Acid – Subang detail pictures

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We strive for excellence, services the customers", hopes to be the top cooperation team and dominator business for personnel, suppliers and prospects, realizes benefit share and continual promotion for OEM/ODM China 2 nitro para cresol - 2,5-Thiophenedicarboxylic Acid – Subang , The product will supply to all over the world, such as: Mexico, Norway, Ukraine, We only supply quality products and we believe this is the only way to keep business continue. We can supply custom service too such as Logo, custom size, or custom products etc that can according to customer's requirement.
    • We feel easy to cooperate with this company, the supplier is very responsible, thanks.There will be more in-depth cooperation.
    5 Stars By Tony from Mombasa - 2017.09.22 11:32
    Wide range, good quality, reasonable prices and good service, advanced equipment, excellent talents and continuously strengthened technology forces，a nice business partner.
    5 Stars By Muriel from Dominica - 2017.11.29 11:09
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