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Zhengzhou Welcom Tech. Co.,Ltd

Free member Since 2009

Henan, China

We mainly produce and export Dyes Intermediates, welcome to visit our main products as follows: J Acid Chemical Name: 2-Amino-5-Naphthol-7-Sulfonic Acid Appearance: Grey to light brown powder; Molecular Formula: C21H16O9N2S2 M. W: 504.50 Use: Used...

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Tina Tang ( Zhengzhou Welcom Tech. Co.,Ltd )
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