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Hedong District,tianjin,China China
Molecular formula: Na2S Molecular weight: *8.*4 Property: Flakes, yellow or red color, soluble in water, p
Molecular formula: NaHS Molecular weight: *6. *6 Property: Orange or yellow, bitter taste, easy to be de
連絡先担当者 Ms. susan su
住所 Hedong District, tianjin
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