China National Standards

China （Sulphonic GB Standards List

  •  China "（Sulphonic" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 21896-2019 2-Naphthylamine-1，5-disulfonic acid （Sulphonic Tobias acid ）
    2-萘胺-1，5-二磺酸（磺化吐氏酸）    		 China National Standards
    （Sulphonic
    English PDF
    GB/T 21896-2008 2-Naphthylamine-1，5-disulfonic acid （Sulphonic Tobias acid ）
    2-萘胺-1，5-二磺酸（磺化吐氏酸）    		 China National Standards
    （Sulphonic
    English PDF

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