ZINC SULFATE FOOD GRADE
一、化学名：食品级一水硫酸锌
二、分子式：ZnSO4.H2O, ZnSO4.7H2O
三、分子量：179.49(一水），287.58（七水）
四、CAS：7446-19-7（一水）；7446-20-0（七水）
五、性能：无色晶体,小针状或粒状晶形粉末,无臭,在空气中会风化。溶液对石蕊呈酸性比重1.957(25/4℃),熔点100℃在280℃失去7H2O,溶于水及甘油,不溶于酒精,毒性底。
六、用途：食品补充剂,动物饲料,媒染剂,木材防腐剂,分析试剂。
七、包装：内衬聚乙烯塑料袋，外套塑料编织袋，每袋25Kg。
八、贮存与运输：应贮在干燥，通风清洁的库房中，轻装轻放，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离堆放。
1、Chemical Name: Zinc sulfate
2、Molecular Formula : ZnSO4.H2O, ZnSO4.7H2O
3、Molecular Weight: 179.48(Monohydrate), 287.54(Heptahydrate)
4、CAS: 7446-19-7（H2O）；7446-20-0 (7H2O)
5、Character: It is colorless or white crystalline powder, odorlessness. Efflorescence in air. Acid hydrometer is 1.957(25/4℃) to litmus. Melting point is 100℃. It’s soluble in water and glycerol, insoluble in ethanol and light toxicity, lose crystal water in 280℃.
6、Usage: It is used as food additives, animal feed, printing and dyeing, timber preservative.Used as analytical reagent.
7、Packing: It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.
8、Storage and Transport: It should be stored in a dry and ventilative warehouse; kept away form water and moisture during transport; unloaded with care, so as to avoid damage to bags. Furthermore, it should be stored separately from poisonous substances.
食品级一水硫酸锌质量指标如下所述：
| 质量指标 | Specification | GB25579-2010 | FCC,1996 | ||
| 含量 w/% | ZnSO4.H2O | Content | ZnSO4.H2O | 99.0-100.5 | 98.0-100.5 |
| ZnSO4.7H2O | ZnSO4.7H2O | 99.0-108.7 | 99.0-108.7 | ||
| 砷(As), mg/kg ≤ | As | 0.0003 | —— | ||
| 碱金属和碱土金属盐 w/% ≤ | Alkali metal | 0.50 | 0.5 | ||
| 酸度 | PH | 通过试验 | 正常 | ||
| 硒(Se), mg/kg ≤ | Se | 0.003 | 0.003 | ||
| 汞(Hg), mg/kg ≤ | Hg | 0.0001 | 0.0005 | ||
| 铅(Pb), mg/kg ≤ | Pb | 0.0004 | 0.001 | ||
| 镉(Cd), mg/kg ≤ | Cd | 0.0002 | 0.0005 | ||
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