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Tianjin Yadong chemical dye works??? ?? ??? ?????.
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Tianjin Yadong chemical dye works
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022-63132064 63130890
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China
URL:
www.yadongchem.com
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470
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C10H8O7S2
Nigrosine
C.I. ??? BLACK 5
11099-03-9
1-???
90-15-3
C10H8O
1,5-?????????
81-04-9
C10H8O6S2
??????7
4197-09-5
C20H16N4Na2O9S2
C.I. ?? ?? 15
2429-74-5
C34H29N6NaO16S4
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