2,5-Thiophenedicarboxylic Acid
Cov qauv qauv
Lub npe tshuaj: 2,5-Thiophenedicarboxylic Acid
Lwm lub npe: 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
Cov mis mos molecular: C6H4O4S
Molecular Luj: 172.16
Numbering System
CAS: 4282-31-9 Nr
PIB: 224-284-2
HS CODE: 2934999090
Cov ntaub ntawv lub cev
Cov tsos mob: dawb mus rau lub teeb yellowish crystal hmoov
Purity: ≥98.0%
Qhov ceev: 1.655 g / cm33
Melting point:> 300 ° C (lit.)
Kub taw tes: 444.6ºCat 760 mmHg
Flashing point: 222.7ºC
Solubility: me ntsis soluble hauv dej
Txoj kev tsim khoom
Adipic acid thiab thionyl chloride sib tov nyob rau hauv qhov hnyav piv ntawm 1: (6-10) thiab refluxed rau 20-60 h nyob rau hauv lub xub ntiag ntawm pyridine catalyst.Cov kuab tshuaj tau evaporated thiab cov residue tau rhuab ntawm 140-160 ℃ rau 3-7 H. Thiophene-2,5-dicarboxylic acid tau txais los ntawm kev kho sodium hydroxide, acid nag lossis daus, pom, decolorization thiab purification.
Daim ntawv thov
Tus neeg sawv cev fluorescent whitening EBF tau npaj los ntawm condensation ntawm cov khoom nrog o-aminophenol.Qhov ci ci no tuaj yeem siv rau nylon, polyester, polypropylene, chloro thiab triacetic acid fibers.Nws yog ib yam khoom uas muaj cov khoom zoo heev.Nws yog tsuas yog siv nyob rau hauv kev npaj ntawm fluorescent whitening tus neeg saib xyuas, feem ntau yog siv nyob rau hauv lub whitening ntawm hluavtaws fiber, EVA, PVC, yas thiab roj hmab, thiab yuav siv tau nyob rau hauv lub whitening ntawm yas zaj duab xis, compression molding cov ntaub ntawv, txhaj tshuaj molding khoom, thiab lwm yam.
Cia
Muab kaw cia rau hauv qhov cua thiab qhov chaw qhuav thiab kom deb ntawm lub teeb.
