Ferrous（Ⅱ） sulfate monohydrate (Ⅰ);
Ferrous（Ⅱ） sulfate heptahydrate (Ⅱ)
Other name：Low iron sulfate, copperas, iron vitriol, xerox, iron fertilizer
CAS No.: 17375-41-6 (Ⅰ); 7782-63-0 (Ⅱ)
EINECS No.: 231-753-5
HS No.: 2833291000
Molecular Formula: FeSO4·H2O (Ⅰ); FeSO4·7H2O (Ⅱ)
Molecular weight：169.92 (Ⅰ); 278.05 (Ⅱ)
1. Appearance: Gray powder (Ⅰ); Turquoise crystal or granule (Ⅱ)
2. Specifications:
2.1 Ferrous（Ⅱ）sulfate heptahydrate
Quality standards：Refer to GB10531–2006
| Item Index | Drying grade |
| Ferrous（Ⅱ）sulfate as FeSO4.7H2O，wt%≥ | 98.0 |
| Iron（Fe）, wt%≥ | 19.7 |
| Titanium dioxide(TiO2), wt%≤ | 0.5 |
| Insoluble Matters, wt%≤ | 0.2 |
| Arsenic（As）, wt%≤ | 0.0005 |
| Heavy metal as Pb, wt%≤ | 0.0020 |
Quality standards：HG2935-2006
| Item Index | powder | granular |
| Ferrous（Ⅱ）sulfate as FeSO4•H2O，wt%≥ | 91.0 | 91.0 |
| Iron（Fe）, wt%≥ | 30.0 | 30.0 |
| Arsenic（As）, wt%≤ | 0.0010 | 0.0010 |
| Heavy metal as Pb, wt%≤ | 0.002 | 0.002 |
4. Uses: Used as pesticide in agriculture, it can control wheat smut, scar of apple and pear scab disease, fruit rot; Also can be used as a fertilizer, can remove the tree moss and lichen.
5. Storage: Stored in cool and ventilated, avoid light place.
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