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Personne àcontacter Mr. jason
NO.36 Lirang Street, shijiazhuang, Hebei
) Zinc sulphate heptahydrate powder/ fertilizer/industry/feed grade ZnSO4.7H2O: *8% min. Zn: ****2.5% min. As: 0.***5% max. Pb: 0.**1% max. Cd: 0.**1% max. Fe: 0.**5% max. 2) Zinc sulphate monohydrate (**4mm) fertilizer/industry/feed grade ZnSO4.7H2O: *8% min. Zn: *5.5% min. As: 0.***5% max. Pb: 0.**1% max. Cd: 0.**1% max. Fe: 0.*1% max. Insoluble matter in water: 0.*5% max.
