食品级硫酸锌价格

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中文名称：食品级硫酸锌
英文名称：Zinc Sulfate Food Grade
分 子 式： ZnSO4.H2O, ZnSO4.7H2O
分 子 量： 179.49(一水)，287.58(七水)
CAS NO：7446-19-7(一水)；7446-20-0(七水)
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。
用　　途： 食品补充剂,动物饲料,媒染剂,木材防腐剂,分析试剂。
包　　装： 内衬聚乙烯塑料袋，外套塑料编织袋，每袋25Kg。
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。
食品级硫酸锌质量指标：

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

1、Chemical Name:  Zinc sulfate2、Molecular Formula : ZnSO4.H2O,  ZnSO4.7H2O3、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.